CommonConfigurationKeysPublic (Apache Hadoop Main 3.2.4 API)

java.lang.Object
- org.apache.hadoop.fs.CommonConfigurationKeysPublic

```
@InterfaceAudience.Public
public class CommonConfigurationKeysPublic
extends Object
```
This class contains constants for configuration keys used in the common code. It includes all publicly documented configuration keys. In general this class should not be used directly (use CommonConfigurationKeys instead)

Field Summary

Fields
Modifier and Type	Field and Description
`static boolean`	`FS_AUTOMATIC_CLOSE_DEFAULT` Default value for FS_AUTOMATIC_CLOSE_KEY
`static String`	`FS_AUTOMATIC_CLOSE_KEY`
`static boolean`	`FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT` Default value for FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY
`static String`	`FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY`
`static String`	`FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED`
`static boolean`	`FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED_DEFAULT` Default value for FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED.
`static String`	`FS_DEFAULT_NAME_DEFAULT` Default value for FS_DEFAULT_NAME_KEY
`static String`	`FS_DEFAULT_NAME_KEY`
`static long`	`FS_DF_INTERVAL_DEFAULT` Default value for FS_DF_INTERVAL_KEY
`static String`	`FS_DF_INTERVAL_KEY`
`static long`	`FS_DU_INTERVAL_DEFAULT` Default value for FS_DU_INTERVAL_KEY
`static String`	`FS_DU_INTERVAL_KEY`
`static String`	`FS_FILE_IMPL_KEY`
`static String`	`FS_FTP_HOST_KEY`
`static String`	`FS_FTP_HOST_PORT_KEY`
`static String`	`FS_GETSPACEUSED_CLASSNAME`
`static long`	`FS_GETSPACEUSED_JITTER_DEFAULT` Default value for FS_GETSPACEUSED_JITTER_KEY
`static String`	`FS_GETSPACEUSED_JITTER_KEY`
`static long`	`FS_LOCAL_BLOCK_SIZE_DEFAULT` Not used anywhere, looks like default value for FS_LOCAL_BLOCK_SIZE
`static String`	`FS_PROTECTED_DIRECTORIES` Directories that cannot be removed unless empty, even by an administrator.
`static long`	`FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT` Default value for FS_TRASH_CHECKPOINT_INTERVAL_KEY
`static String`	`FS_TRASH_CHECKPOINT_INTERVAL_KEY`
`static long`	`FS_TRASH_INTERVAL_DEFAULT` Default value for FS_TRASH_INTERVAL_KEY
`static String`	`FS_TRASH_INTERVAL_KEY`
`static boolean`	`HADOOP_CALLER_CONTEXT_ENABLED_DEFAULT`
`static String`	`HADOOP_CALLER_CONTEXT_ENABLED_KEY`
`static int`	`HADOOP_CALLER_CONTEXT_MAX_SIZE_DEFAULT`
`static String`	`HADOOP_CALLER_CONTEXT_MAX_SIZE_KEY`
`static int`	`HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_DEFAULT`
`static String`	`HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_KEY`
`static String`	`HADOOP_CUSTOM_TAGS` Deprecated. Please use `HADOOP_TAGS_CUSTOM` instead See https://issues.apache.org/jira/browse/HADOOP-15474
`static String`	`HADOOP_HTTP_AUTHENTICATION_TYPE`
`static int`	`HADOOP_HTTP_IDLE_TIMEOUT_MS_DEFAULT`
`static String`	`HADOOP_HTTP_IDLE_TIMEOUT_MS_KEY`
`static String`	`HADOOP_HTTP_LOGS_ENABLED`
`static boolean`	`HADOOP_HTTP_LOGS_ENABLED_DEFAULT` Defalt value for HADOOP_HTTP_LOGS_ENABLED
`static String`	`HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN`
`static int`	`HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN_DEFAULT` Default value for HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN
`static String`	`HADOOP_RPC_PROTECTION`
`static String`	`HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_DEFAULT`
`static String`	`HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY`
`static String`	`HADOOP_SECURITY_AUTH_TO_LOCAL`
`static String`	`HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM`
`static String`	`HADOOP_SECURITY_AUTHENTICATION`
`static String`	`HADOOP_SECURITY_AUTHORIZATION`
`static String`	`HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK`
`static boolean`	`HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK_DEFAULT`
`static String`	`HADOOP_SECURITY_CREDENTIAL_PASSWORD_FILE_KEY`
`static String`	`HADOOP_SECURITY_CREDENTIAL_PROVIDER_PATH`
`static int`	`HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_DEFAULT` Defalt value for HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY
`static String`	`HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY`
`static String`	`HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT`
`static String`	`HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_KEY`
`static String`	`HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_DEFAULT`
`static String`	`HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_KEY`
`static String`	`HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_KEY_PREFIX`
`static String`	`HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY`
`static String`	`HADOOP_SECURITY_CRYPTO_JCEKS_KEY_SERIALFILTER`
`static String`	`HADOOP_SECURITY_DNS_INTERFACE_KEY`
`static String`	`HADOOP_SECURITY_DNS_NAMESERVER_KEY`
`static String`	`HADOOP_SECURITY_GROUP_MAPPING`
`static long`	`HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT`
`static String`	`HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY`
`static String`	`HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS` Deprecated. use `HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY` instead.
`static long`	`HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS_DEFAULT` Deprecated. use `HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT` instead.
`static String`	`HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD`
`static boolean`	`HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_DEFAULT`
`static String`	`HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS`
`static int`	`HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS_DEFAULT`
`static String`	`HADOOP_SECURITY_GROUPS_CACHE_SECS`
`static long`	`HADOOP_SECURITY_GROUPS_CACHE_SECS_DEFAULT`
`static String`	`HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS`
`static long`	`HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS_DEFAULT`
`static String`	`HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS`
`static long`	`HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS_DEFAULT`
`static String`	`HADOOP_SECURITY_IMPERSONATION_PROVIDER_CLASS` Class to override Impersonation provider
`static String`	`HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN`
`static String`	`HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT` Defalt value for HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY
`static String`	`HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY`
`static int`	`HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_DEFAULT` Defalt value for HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY.
`static String`	`HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY`
`static String`	`HADOOP_SECURITY_KEY_DEFAULT_CIPHER_DEFAULT` Defalt value for HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY.
`static String`	`HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY`
`static String`	`HADOOP_SECURITY_KEY_PROVIDER_PATH`
`static String`	`HADOOP_SECURITY_SASL_PROPS_RESOLVER_CLASS` Class to override Sasl Properties for a connection
`static String`	`HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_DEFAULT`
`static String`	`HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_KEY`
`static String`	`HADOOP_SECURITY_SECURE_RANDOM_IMPL_KEY`
`static String`	`HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS`
`static String`	`HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS_DEFAULT`
`static String`	`HADOOP_SECURITY_SERVICE_USER_NAME_KEY`
`static boolean`	`HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_DEFAULT`
`static String`	`HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_KEY`
`static String`	`HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES`
`static long`	`HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES_DEFAULT`
`static String`	`HADOOP_SOCKS_SERVER_KEY`
`static String`	`HADOOP_SYSTEM_TAGS` Deprecated. Please use `HADOOP_TAGS_SYSTEM` instead See https://issues.apache.org/jira/browse/HADOOP-15474
`static String`	`HADOOP_TAGS_CUSTOM`
`static String`	`HADOOP_TAGS_SYSTEM`
`static String`	`HADOOP_TOKEN_FILES`
`static String`	`HADOOP_UTIL_HASH_TYPE_DEFAULT` Default value for HADOOP_UTIL_HASH_TYPE_KEY
`static String`	`HADOOP_UTIL_HASH_TYPE_KEY`
`static String`	`IO_COMPRESSION_CODEC_LZO_CLASS_KEY` Codec class that implements Lzo compression algorithm
`static int`	`IO_FILE_BUFFER_SIZE_DEFAULT` Default value for IO_FILE_BUFFER_SIZE_KEY
`static String`	`IO_FILE_BUFFER_SIZE_KEY`
`static int`	`IO_MAP_INDEX_INTERVAL_DEFAULT` Default value for IO_MAP_INDEX_INTERVAL_DEFAULT
`static String`	`IO_MAP_INDEX_INTERVAL_KEY`
`static int`	`IO_MAP_INDEX_SKIP_DEFAULT` Default value for IO_MAP_INDEX_SKIP_KEY
`static String`	`IO_MAP_INDEX_SKIP_KEY`
`static float`	`IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT` Default value for IO_MAPFILE_BLOOM_ERROR_RATE_KEY
`static String`	`IO_MAPFILE_BLOOM_ERROR_RATE_KEY`
`static int`	`IO_MAPFILE_BLOOM_SIZE_DEFAULT` Default value for IO_MAPFILE_BLOOM_SIZE_KEY
`static String`	`IO_MAPFILE_BLOOM_SIZE_KEY`
`static int`	`IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT` Default value for IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY
`static String`	`IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY`
`static String`	`IO_SERIALIZATIONS_KEY`
`static boolean`	`IO_SKIP_CHECKSUM_ERRORS_DEFAULT` Default value for IO_SKIP_CHECKSUM_ERRORS_KEY
`static String`	`IO_SKIP_CHECKSUM_ERRORS_KEY`
`static int`	`IO_SORT_FACTOR_DEFAULT` Default value for `IO_SORT_FACTOR_KEY`.
`static String`	`IO_SORT_FACTOR_KEY` Deprecated. Moved to mapreduce, see mapreduce.task.io.sort.factor in mapred-default.xml See https://issues.apache.org/jira/browse/HADOOP-6801 For `SequenceFile.Sorter` control instead, see `SEQ_IO_SORT_FACTOR_KEY`.
`static int`	`IO_SORT_MB_DEFAULT` Default value for `IO_SORT_MB_KEY`.
`static String`	`IO_SORT_MB_KEY` Deprecated. Moved to mapreduce, see mapreduce.task.io.sort.mb in mapred-default.xml See https://issues.apache.org/jira/browse/HADOOP-6801 For `SequenceFile.Sorter` control instead, see `SEQ_IO_SORT_MB_KEY`.
`static int`	`IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT` Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_KEY
`static String`	`IPC_CLIENT_CONNECT_MAX_RETRIES_KEY`
`static int`	`IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT` Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY
`static String`	`IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY`
`static int`	`IPC_CLIENT_CONNECT_RETRY_INTERVAL_DEFAULT` Default value for IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY
`static String`	`IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY`
`static int`	`IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT` Default value for IPC_CLIENT_CONNECT_TIMEOUT_KEY
`static String`	`IPC_CLIENT_CONNECT_TIMEOUT_KEY`
`static int`	`IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT` Default value for IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY
`static String`	`IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY`
`static int`	`IPC_CLIENT_IDLETHRESHOLD_DEFAULT` Default value for IPC_CLIENT_IDLETHRESHOLD_DEFAULT
`static String`	`IPC_CLIENT_IDLETHRESHOLD_KEY`
`static int`	`IPC_CLIENT_KILL_MAX_DEFAULT` Default value for IPC_CLIENT_KILL_MAX_KEY
`static String`	`IPC_CLIENT_KILL_MAX_KEY`
`static String`	`IPC_CLIENT_LOW_LATENCY` Enable low-latency connections from the client
`static boolean`	`IPC_CLIENT_LOW_LATENCY_DEFAULT` Default value of IPC_CLIENT_LOW_LATENCY
`static boolean`	`IPC_CLIENT_TCPNODELAY_DEFAULT` Default value for IPC_CLIENT_TCPNODELAY_KEY
`static String`	`IPC_CLIENT_TCPNODELAY_KEY`
`static int`	`IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT` Default value for IPC_SERVER_LISTEN_QUEUE_SIZE_KEY
`static String`	`IPC_SERVER_LISTEN_QUEUE_SIZE_KEY`
`static String`	`IPC_SERVER_LOG_SLOW_RPC` Logs if a RPC is really slow compared to rest of RPCs.
`static boolean`	`IPC_SERVER_LOG_SLOW_RPC_DEFAULT`
`static int`	`IPC_SERVER_MAX_CONNECTIONS_DEFAULT` Default value for IPC_SERVER_MAX_CONNECTIONS_KEY
`static String`	`IPC_SERVER_MAX_CONNECTIONS_KEY`
`static int`	`IPC_SERVER_PURGE_INTERVAL_MINUTES_DEFAULT`
`static String`	`IPC_SERVER_PURGE_INTERVAL_MINUTES_KEY`
`static boolean`	`IPC_SERVER_TCPNODELAY_DEFAULT` Default value for IPC_SERVER_TCPNODELAY_KEY
`static String`	`IPC_SERVER_TCPNODELAY_KEY`
`static int`	`KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT` Default value for KMS_CLIENT_ENC_KEY_CACHE_EXPIRY (12 hrs)
`static String`	`KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS`
`static String`	`KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK`
`static float`	`KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT` Default value for KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK
`static String`	`KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS`
`static int`	`KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT` Default value for KMS_CLIENT_ENC_KEY_NUM_REFILL_THREADS
`static String`	`KMS_CLIENT_ENC_KEY_CACHE_SIZE`
`static int`	`KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT` Default value for KMS_CLIENT_ENC_KEY_CACHE_SIZE
`static String`	`KMS_CLIENT_FAILOVER_MAX_RETRIES_KEY` Default value is the number of providers specified.
`static int`	`KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_DEFAULT` Default value is 100 ms.
`static String`	`KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_KEY`
`static int`	`KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_DEFAULT` Default value is 2 secs.
`static String`	`KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_KEY`
`static int`	`KMS_CLIENT_TIMEOUT_DEFAULT`
`static String`	`KMS_CLIENT_TIMEOUT_SECONDS`
`static String`	`NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY`
`static String`	`NET_TOPOLOGY_IMPL_KEY`
`static String`	`NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY`
`static String`	`NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY`
`static int`	`NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT` Default value for NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY
`static String`	`NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY`
`static String`	`NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY`
`static int`	`SEQ_IO_SORT_FACTOR_DEFAULT` Default value for `SEQ_IO_SORT_FACTOR_KEY`.
`static String`	`SEQ_IO_SORT_FACTOR_KEY`
`static int`	`SEQ_IO_SORT_MB_DEFAULT` Default value for `SEQ_IO_SORT_MB_KEY`.
`static String`	`SEQ_IO_SORT_MB_KEY`
`static String`	`SERVICE_SHUTDOWN_TIMEOUT` Configuration option for the shutdown hook manager shutdown time: "hadoop.service.shutdown.timeout".
`static long`	`SERVICE_SHUTDOWN_TIMEOUT_DEFAULT` Default shutdown hook timeout: 30L seconds.
`static int`	`TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT` Default value for TFILE_FS_INPUT_BUFFER_SIZE_KEY
`static String`	`TFILE_FS_INPUT_BUFFER_SIZE_KEY`
`static int`	`TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT` Default value for TFILE_FS_OUTPUT_BUFFER_SIZE_KEY
`static String`	`TFILE_FS_OUTPUT_BUFFER_SIZE_KEY`
`static int`	`TFILE_IO_CHUNK_SIZE_DEFAULT` Default value for TFILE_IO_CHUNK_SIZE_DEFAULT
`static String`	`TFILE_IO_CHUNK_SIZE_KEY`

Constructor Summary

Constructors
Constructor and Description

CommonConfigurationKeysPublic()

Constructors
Constructor and Description
`CommonConfigurationKeysPublic()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY
```
public static final String NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT
```
public static final int NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT
```
    Default value for NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY
    
    See Also:
    
    Constant Field Values
  - FS_DEFAULT_NAME_KEY
```
public static final String FS_DEFAULT_NAME_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_DEFAULT_NAME_DEFAULT
```
public static final String FS_DEFAULT_NAME_DEFAULT
```
    Default value for FS_DEFAULT_NAME_KEY
    
    See Also:
    
    Constant Field Values
  - FS_DF_INTERVAL_KEY
```
public static final String FS_DF_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_DF_INTERVAL_DEFAULT
```
public static final long FS_DF_INTERVAL_DEFAULT
```
    Default value for FS_DF_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - FS_DU_INTERVAL_KEY
```
public static final String FS_DU_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_DU_INTERVAL_DEFAULT
```
public static final long FS_DU_INTERVAL_DEFAULT
```
    Default value for FS_DU_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - FS_GETSPACEUSED_CLASSNAME
```
public static final String FS_GETSPACEUSED_CLASSNAME
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_GETSPACEUSED_JITTER_KEY
```
public static final String FS_GETSPACEUSED_JITTER_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_GETSPACEUSED_JITTER_DEFAULT
```
public static final long FS_GETSPACEUSED_JITTER_DEFAULT
```
    Default value for FS_GETSPACEUSED_JITTER_KEY
    
    See Also:
    
    Constant Field Values
  - FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY
```
public static final String FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT
```
public static final boolean FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT
```
    Default value for FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY
    
    See Also:
    
    Constant Field Values
  - NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY
```
public static final String NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY
```
public static final String NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - NET_TOPOLOGY_IMPL_KEY
```
public static final String NET_TOPOLOGY_IMPL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY
```
public static final String NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY
```
public static final String NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY
```
    See Also:
    
    Constant Field Values
  - FS_TRASH_CHECKPOINT_INTERVAL_KEY
```
public static final String FS_TRASH_CHECKPOINT_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT
```
public static final long FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT
```
    Default value for FS_TRASH_CHECKPOINT_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - FS_PROTECTED_DIRECTORIES
```
public static final String FS_PROTECTED_DIRECTORIES
```
    Directories that cannot be removed unless empty, even by an administrator.
    
    See Also:
    
    Constant Field Values
  - FS_LOCAL_BLOCK_SIZE_DEFAULT
```
public static final long FS_LOCAL_BLOCK_SIZE_DEFAULT
```
    Not used anywhere, looks like default value for FS_LOCAL_BLOCK_SIZE
    
    See Also:
    
    Constant Field Values
  - FS_AUTOMATIC_CLOSE_KEY
```
public static final String FS_AUTOMATIC_CLOSE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_AUTOMATIC_CLOSE_DEFAULT
```
public static final boolean FS_AUTOMATIC_CLOSE_DEFAULT
```
    Default value for FS_AUTOMATIC_CLOSE_KEY
    
    See Also:
    
    Constant Field Values
  - FS_FILE_IMPL_KEY
```
public static final String FS_FILE_IMPL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_FTP_HOST_KEY
```
public static final String FS_FTP_HOST_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_FTP_HOST_PORT_KEY
```
public static final String FS_FTP_HOST_PORT_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_TRASH_INTERVAL_KEY
```
public static final String FS_TRASH_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_TRASH_INTERVAL_DEFAULT
```
public static final long FS_TRASH_INTERVAL_DEFAULT
```
    Default value for FS_TRASH_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED
```
public static final String FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED
```
    See Also:
    
    core-default.xml, Constant Field Values
  - FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED_DEFAULT
```
public static final boolean FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED_DEFAULT
```
    Default value for FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED.
    
    See Also:
    
    Constant Field Values
  - IO_MAPFILE_BLOOM_SIZE_KEY
```
public static final String IO_MAPFILE_BLOOM_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_MAPFILE_BLOOM_SIZE_DEFAULT
```
public static final int IO_MAPFILE_BLOOM_SIZE_DEFAULT
```
    Default value for IO_MAPFILE_BLOOM_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_MAPFILE_BLOOM_ERROR_RATE_KEY
```
public static final String IO_MAPFILE_BLOOM_ERROR_RATE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT
```
public static final float IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT
```
    Default value for IO_MAPFILE_BLOOM_ERROR_RATE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZO_CLASS_KEY
```
public static final String IO_COMPRESSION_CODEC_LZO_CLASS_KEY
```
    Codec class that implements Lzo compression algorithm
    
    See Also:
    
    Constant Field Values
  - IO_MAP_INDEX_INTERVAL_KEY
```
public static final String IO_MAP_INDEX_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_MAP_INDEX_INTERVAL_DEFAULT
```
public static final int IO_MAP_INDEX_INTERVAL_DEFAULT
```
    Default value for IO_MAP_INDEX_INTERVAL_DEFAULT
    
    See Also:
    
    Constant Field Values
  - IO_MAP_INDEX_SKIP_KEY
```
public static final String IO_MAP_INDEX_SKIP_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_MAP_INDEX_SKIP_DEFAULT
```
public static final int IO_MAP_INDEX_SKIP_DEFAULT
```
    Default value for IO_MAP_INDEX_SKIP_KEY
    
    See Also:
    
    Constant Field Values
  - IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY
```
public static final String IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT
```
public static final int IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT
```
    Default value for IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_FILE_BUFFER_SIZE_KEY
```
public static final String IO_FILE_BUFFER_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_FILE_BUFFER_SIZE_DEFAULT
```
public static final int IO_FILE_BUFFER_SIZE_DEFAULT
```
    Default value for IO_FILE_BUFFER_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_SKIP_CHECKSUM_ERRORS_KEY
```
public static final String IO_SKIP_CHECKSUM_ERRORS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IO_SKIP_CHECKSUM_ERRORS_DEFAULT
```
public static final boolean IO_SKIP_CHECKSUM_ERRORS_DEFAULT
```
    Default value for IO_SKIP_CHECKSUM_ERRORS_KEY
    
    See Also:
    
    Constant Field Values
  - IO_SORT_MB_KEY
```
public static final String IO_SORT_MB_KEY
```
    Deprecated. Moved to mapreduce, see mapreduce.task.io.sort.mb in mapred-default.xml See https://issues.apache.org/jira/browse/HADOOP-6801 For SequenceFile.Sorter control instead, see SEQ_IO_SORT_MB_KEY.
    
    See Also:
    
    Constant Field Values
  - IO_SORT_MB_DEFAULT
```
public static final int IO_SORT_MB_DEFAULT
```
    Default value for IO_SORT_MB_KEY.
    
    See Also:
    
    Constant Field Values
  - IO_SORT_FACTOR_KEY
```
public static final String IO_SORT_FACTOR_KEY
```
    Deprecated. Moved to mapreduce, see mapreduce.task.io.sort.factor in mapred-default.xml See https://issues.apache.org/jira/browse/HADOOP-6801 For SequenceFile.Sorter control instead, see SEQ_IO_SORT_FACTOR_KEY.
    
    See Also:
    
    Constant Field Values
  - IO_SORT_FACTOR_DEFAULT
```
public static final int IO_SORT_FACTOR_DEFAULT
```
    Default value for IO_SORT_FACTOR_KEY.
    
    See Also:
    
    Constant Field Values
  - SEQ_IO_SORT_MB_KEY
```
public static final String SEQ_IO_SORT_MB_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - SEQ_IO_SORT_MB_DEFAULT
```
public static final int SEQ_IO_SORT_MB_DEFAULT
```
    Default value for SEQ_IO_SORT_MB_KEY.
    
    See Also:
    
    Constant Field Values
  - SEQ_IO_SORT_FACTOR_KEY
```
public static final String SEQ_IO_SORT_FACTOR_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - SEQ_IO_SORT_FACTOR_DEFAULT
```
public static final int SEQ_IO_SORT_FACTOR_DEFAULT
```
    Default value for SEQ_IO_SORT_FACTOR_KEY.
    
    See Also:
    
    Constant Field Values
  - IO_SERIALIZATIONS_KEY
```
public static final String IO_SERIALIZATIONS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - TFILE_IO_CHUNK_SIZE_KEY
```
public static final String TFILE_IO_CHUNK_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - TFILE_IO_CHUNK_SIZE_DEFAULT
```
public static final int TFILE_IO_CHUNK_SIZE_DEFAULT
```
    Default value for TFILE_IO_CHUNK_SIZE_DEFAULT
    
    See Also:
    
    Constant Field Values
  - TFILE_FS_INPUT_BUFFER_SIZE_KEY
```
public static final String TFILE_FS_INPUT_BUFFER_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT
```
public static final int TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT
```
    Default value for TFILE_FS_INPUT_BUFFER_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - TFILE_FS_OUTPUT_BUFFER_SIZE_KEY
```
public static final String TFILE_FS_OUTPUT_BUFFER_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT
```
public static final int TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT
```
    Default value for TFILE_FS_OUTPUT_BUFFER_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_ENABLED_KEY
```
public static final String HADOOP_CALLER_CONTEXT_ENABLED_KEY
```
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_ENABLED_DEFAULT
```
public static final boolean HADOOP_CALLER_CONTEXT_ENABLED_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_MAX_SIZE_KEY
```
public static final String HADOOP_CALLER_CONTEXT_MAX_SIZE_KEY
```
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_MAX_SIZE_DEFAULT
```
public static final int HADOOP_CALLER_CONTEXT_MAX_SIZE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_KEY
```
public static final String HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_KEY
```
    See Also:
    
    Constant Field Values
  - HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_DEFAULT
```
public static final int HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY
```
public static final String IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT
```
public static final int IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT
```
    Default value for IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_TIMEOUT_KEY
```
public static final String IPC_CLIENT_CONNECT_TIMEOUT_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT
```
public static final int IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT
```
    Default value for IPC_CLIENT_CONNECT_TIMEOUT_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_KEY
```
public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT
```
public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT
```
    Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY
```
public static final String IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_CONNECT_RETRY_INTERVAL_DEFAULT
```
public static final int IPC_CLIENT_CONNECT_RETRY_INTERVAL_DEFAULT
```
    Default value for IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY
```
public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT
```
public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT
```
    Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_TCPNODELAY_KEY
```
public static final String IPC_CLIENT_TCPNODELAY_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_TCPNODELAY_DEFAULT
```
public static final boolean IPC_CLIENT_TCPNODELAY_DEFAULT
```
    Default value for IPC_CLIENT_TCPNODELAY_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_LOW_LATENCY
```
public static final String IPC_CLIENT_LOW_LATENCY
```
    Enable low-latency connections from the client
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_LOW_LATENCY_DEFAULT
```
public static final boolean IPC_CLIENT_LOW_LATENCY_DEFAULT
```
    Default value of IPC_CLIENT_LOW_LATENCY
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_LISTEN_QUEUE_SIZE_KEY
```
public static final String IPC_SERVER_LISTEN_QUEUE_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT
```
public static final int IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT
```
    Default value for IPC_SERVER_LISTEN_QUEUE_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_KILL_MAX_KEY
```
public static final String IPC_CLIENT_KILL_MAX_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_KILL_MAX_DEFAULT
```
public static final int IPC_CLIENT_KILL_MAX_DEFAULT
```
    Default value for IPC_CLIENT_KILL_MAX_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_IDLETHRESHOLD_KEY
```
public static final String IPC_CLIENT_IDLETHRESHOLD_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_CLIENT_IDLETHRESHOLD_DEFAULT
```
public static final int IPC_CLIENT_IDLETHRESHOLD_DEFAULT
```
    Default value for IPC_CLIENT_IDLETHRESHOLD_DEFAULT
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_TCPNODELAY_KEY
```
public static final String IPC_SERVER_TCPNODELAY_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_SERVER_TCPNODELAY_DEFAULT
```
public static final boolean IPC_SERVER_TCPNODELAY_DEFAULT
```
    Default value for IPC_SERVER_TCPNODELAY_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_MAX_CONNECTIONS_KEY
```
public static final String IPC_SERVER_MAX_CONNECTIONS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - IPC_SERVER_MAX_CONNECTIONS_DEFAULT
```
public static final int IPC_SERVER_MAX_CONNECTIONS_DEFAULT
```
    Default value for IPC_SERVER_MAX_CONNECTIONS_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_LOG_SLOW_RPC
```
public static final String IPC_SERVER_LOG_SLOW_RPC
```
    Logs if a RPC is really slow compared to rest of RPCs.
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_LOG_SLOW_RPC_DEFAULT
```
public static final boolean IPC_SERVER_LOG_SLOW_RPC_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_SERVER_PURGE_INTERVAL_MINUTES_KEY
```
public static final String IPC_SERVER_PURGE_INTERVAL_MINUTES_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_SERVER_PURGE_INTERVAL_MINUTES_DEFAULT
```
public static final int IPC_SERVER_PURGE_INTERVAL_MINUTES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY
```
public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_DEFAULT
```
public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SOCKS_SERVER_KEY
```
public static final String HADOOP_SOCKS_SERVER_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_UTIL_HASH_TYPE_KEY
```
public static final String HADOOP_UTIL_HASH_TYPE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_UTIL_HASH_TYPE_DEFAULT
```
public static final String HADOOP_UTIL_HASH_TYPE_DEFAULT
```
    Default value for HADOOP_UTIL_HASH_TYPE_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_GROUP_MAPPING
```
public static final String HADOOP_SECURITY_GROUP_MAPPING
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_SECS
```
public static final String HADOOP_SECURITY_GROUPS_CACHE_SECS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_SECS_DEFAULT
```
public static final long HADOOP_SECURITY_GROUPS_CACHE_SECS_DEFAULT
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS
```
public static final String HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS_DEFAULT
```
public static final long HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS_DEFAULT
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS
```
public static final String HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS_DEFAULT
```
public static final long HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD
```
public static final String HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_DEFAULT
```
public static final boolean HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_DEFAULT
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS
```
public static final String HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS_DEFAULT
```
public static final int HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS_DEFAULT
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY
```
public static final String HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS
```
public static final String HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS
```
    Deprecated. use HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY instead.
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT
```
public static final long HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS_DEFAULT
```
public static final long HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS_DEFAULT
```
    Deprecated. use HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT instead.
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_AUTHENTICATION
```
public static final String HADOOP_SECURITY_AUTHENTICATION
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_AUTHORIZATION
```
public static final String HADOOP_SECURITY_AUTHORIZATION
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN
```
public static final String HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SERVICE_USER_NAME_KEY
```
public static final String HADOOP_SECURITY_SERVICE_USER_NAME_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_AUTH_TO_LOCAL
```
public static final String HADOOP_SECURITY_AUTH_TO_LOCAL
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM
```
public static final String HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_DNS_INTERFACE_KEY
```
public static final String HADOOP_SECURITY_DNS_INTERFACE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_DNS_NAMESERVER_KEY
```
public static final String HADOOP_SECURITY_DNS_NAMESERVER_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_TOKEN_FILES
```
public static final String HADOOP_TOKEN_FILES
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_HTTP_AUTHENTICATION_TYPE
```
public static final String HADOOP_HTTP_AUTHENTICATION_TYPE
```
    See Also:
    
    Constant Field Values
  - HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN
```
public static final String HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN_DEFAULT
```
public static final int HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN_DEFAULT
```
    Default value for HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN
    
    See Also:
    
    Constant Field Values
  - HADOOP_RPC_PROTECTION
```
public static final String HADOOP_RPC_PROTECTION
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SASL_PROPS_RESOLVER_CLASS
```
public static final String HADOOP_SECURITY_SASL_PROPS_RESOLVER_CLASS
```
    Class to override Sasl Properties for a connection
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_KEY_PREFIX
```
public static final String HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_KEY_PREFIX
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_KEY
```
public static final String HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_KEY
```
  - HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_DEFAULT
```
public static final String HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_DEFAULT
```
  - HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_KEY
```
public static final String HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT
```
public static final String HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY
```
public static final String HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CRYPTO_JCEKS_KEY_SERIALFILTER
```
public static final String HADOOP_SECURITY_CRYPTO_JCEKS_KEY_SERIALFILTER
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY
```
public static final String HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_DEFAULT
```
public static final int HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_DEFAULT
```
    Defalt value for HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_IMPERSONATION_PROVIDER_CLASS
```
public static final String HADOOP_SECURITY_IMPERSONATION_PROVIDER_CLASS
```
    Class to override Impersonation provider
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_KEY_PROVIDER_PATH
```
public static final String HADOOP_SECURITY_KEY_PROVIDER_PATH
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY
```
public static final String HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_DEFAULT
```
public static final int HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_DEFAULT
```
    Defalt value for HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY.
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY
```
public static final String HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_KEY_DEFAULT_CIPHER_DEFAULT
```
public static final String HADOOP_SECURITY_KEY_DEFAULT_CIPHER_DEFAULT
```
    Defalt value for HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY.
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_SIZE
```
public static final String KMS_CLIENT_ENC_KEY_CACHE_SIZE
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT
```
public static final int KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT
```
    Default value for KMS_CLIENT_ENC_KEY_CACHE_SIZE
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK
```
public static final String KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT
```
public static final float KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT
```
    Default value for KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS
```
public static final String KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT
```
public static final int KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT
```
    Default value for KMS_CLIENT_ENC_KEY_NUM_REFILL_THREADS
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS
```
public static final String KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT
```
public static final int KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT
```
    Default value for KMS_CLIENT_ENC_KEY_CACHE_EXPIRY (12 hrs)
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_TIMEOUT_SECONDS
```
public static final String KMS_CLIENT_TIMEOUT_SECONDS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_TIMEOUT_DEFAULT
```
public static final int KMS_CLIENT_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_FAILOVER_MAX_RETRIES_KEY
```
public static final String KMS_CLIENT_FAILOVER_MAX_RETRIES_KEY
```
    Default value is the number of providers specified.
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_KEY
```
public static final String KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_DEFAULT
```
public static final int KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_DEFAULT
```
    Default value is 100 ms.
    
    See Also:
    
    Constant Field Values
  - KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_KEY
```
public static final String KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_DEFAULT
```
public static final int KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_DEFAULT
```
    Default value is 2 secs.
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY
```
public static final String HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT
```
public static final String HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT
```
    Defalt value for HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SECURE_RANDOM_IMPL_KEY
```
public static final String HADOOP_SECURITY_SECURE_RANDOM_IMPL_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_KEY
```
public static final String HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_DEFAULT
```
public static final String HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_KEY
```
public static final String HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_DEFAULT
```
public static final boolean HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES
```
public static final String HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES_DEFAULT
```
public static final long HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_HTTP_LOGS_ENABLED
```
public static final String HADOOP_HTTP_LOGS_ENABLED
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_HTTP_LOGS_ENABLED_DEFAULT
```
public static final boolean HADOOP_HTTP_LOGS_ENABLED_DEFAULT
```
    Defalt value for HADOOP_HTTP_LOGS_ENABLED
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_CREDENTIAL_PROVIDER_PATH
```
public static final String HADOOP_SECURITY_CREDENTIAL_PROVIDER_PATH
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK
```
public static final String HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK_DEFAULT
```
public static final boolean HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_CREDENTIAL_PASSWORD_FILE_KEY
```
public static final String HADOOP_SECURITY_CREDENTIAL_PASSWORD_FILE_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS
```
public static final String HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS_DEFAULT
```
public static final String HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS_DEFAULT
```
  - HADOOP_SYSTEM_TAGS
```
public static final String HADOOP_SYSTEM_TAGS
```
    Deprecated. Please use HADOOP_TAGS_SYSTEM instead See https://issues.apache.org/jira/browse/HADOOP-15474
    
    See Also:
    
    Constant Field Values
  - HADOOP_CUSTOM_TAGS
```
public static final String HADOOP_CUSTOM_TAGS
```
    Deprecated. Please use HADOOP_TAGS_CUSTOM instead See https://issues.apache.org/jira/browse/HADOOP-15474
    
    See Also:
    
    Constant Field Values
  - HADOOP_TAGS_SYSTEM
```
public static final String HADOOP_TAGS_SYSTEM
```
    See Also:
    
    Constant Field Values
  - HADOOP_TAGS_CUSTOM
```
public static final String HADOOP_TAGS_CUSTOM
```
    See Also:
    
    Constant Field Values
  - SERVICE_SHUTDOWN_TIMEOUT
```
public static final String SERVICE_SHUTDOWN_TIMEOUT
```
    Configuration option for the shutdown hook manager shutdown time: "hadoop.service.shutdown.timeout".
    
    See Also:
    
    Constant Field Values
  - SERVICE_SHUTDOWN_TIMEOUT_DEFAULT
```
public static final long SERVICE_SHUTDOWN_TIMEOUT_DEFAULT
```
    Default shutdown hook timeout: 30L seconds.
    
    See Also:
    
    Constant Field Values
  - HADOOP_HTTP_IDLE_TIMEOUT_MS_KEY
```
public static final String HADOOP_HTTP_IDLE_TIMEOUT_MS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_HTTP_IDLE_TIMEOUT_MS_DEFAULT
```
public static final int HADOOP_HTTP_IDLE_TIMEOUT_MS_DEFAULT
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - CommonConfigurationKeysPublic
```
public CommonConfigurationKeysPublic()
```

Class CommonConfigurationKeysPublic

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY

NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT

FS_DEFAULT_NAME_KEY

FS_DEFAULT_NAME_DEFAULT

FS_DF_INTERVAL_KEY

FS_DF_INTERVAL_DEFAULT

FS_DU_INTERVAL_KEY

FS_DU_INTERVAL_DEFAULT

FS_GETSPACEUSED_CLASSNAME

FS_GETSPACEUSED_JITTER_KEY

FS_GETSPACEUSED_JITTER_DEFAULT

FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY

FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT

NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY

NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY

NET_TOPOLOGY_IMPL_KEY

NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY

NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY

FS_TRASH_CHECKPOINT_INTERVAL_KEY

FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT

FS_PROTECTED_DIRECTORIES

FS_LOCAL_BLOCK_SIZE_DEFAULT

FS_AUTOMATIC_CLOSE_KEY

FS_AUTOMATIC_CLOSE_DEFAULT

FS_FILE_IMPL_KEY

FS_FTP_HOST_KEY

FS_FTP_HOST_PORT_KEY

FS_TRASH_INTERVAL_KEY

FS_TRASH_INTERVAL_DEFAULT

FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED

FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED_DEFAULT

IO_MAPFILE_BLOOM_SIZE_KEY

IO_MAPFILE_BLOOM_SIZE_DEFAULT

IO_MAPFILE_BLOOM_ERROR_RATE_KEY

IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT

IO_COMPRESSION_CODEC_LZO_CLASS_KEY

IO_MAP_INDEX_INTERVAL_KEY

IO_MAP_INDEX_INTERVAL_DEFAULT

IO_MAP_INDEX_SKIP_KEY

IO_MAP_INDEX_SKIP_DEFAULT

IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY

IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT

IO_FILE_BUFFER_SIZE_KEY

IO_FILE_BUFFER_SIZE_DEFAULT

IO_SKIP_CHECKSUM_ERRORS_KEY

IO_SKIP_CHECKSUM_ERRORS_DEFAULT

IO_SORT_MB_KEY

IO_SORT_MB_DEFAULT

IO_SORT_FACTOR_KEY

IO_SORT_FACTOR_DEFAULT

SEQ_IO_SORT_MB_KEY

SEQ_IO_SORT_MB_DEFAULT

SEQ_IO_SORT_FACTOR_KEY

SEQ_IO_SORT_FACTOR_DEFAULT

IO_SERIALIZATIONS_KEY

TFILE_IO_CHUNK_SIZE_KEY

TFILE_IO_CHUNK_SIZE_DEFAULT

TFILE_FS_INPUT_BUFFER_SIZE_KEY

TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT

TFILE_FS_OUTPUT_BUFFER_SIZE_KEY

TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT

HADOOP_CALLER_CONTEXT_ENABLED_KEY

HADOOP_CALLER_CONTEXT_ENABLED_DEFAULT

HADOOP_CALLER_CONTEXT_MAX_SIZE_KEY

HADOOP_CALLER_CONTEXT_MAX_SIZE_DEFAULT

HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_KEY

HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_DEFAULT

IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY

IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT

IPC_CLIENT_CONNECT_TIMEOUT_KEY

IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT

IPC_CLIENT_CONNECT_MAX_RETRIES_KEY

IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT

IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY