Troubleshooting S3A

Here are some lower level details and hints on troubleshooting and tuning the S3A client.

Logging at lower levels

The AWS SDK and the Apache HTTP components can be configured to log at more detail, as can S3A itself.

Be aware that logging HTTP headers may leak sensitive AWS account information, so should not be shared.

Advanced: network performance

An example of this is covered in HADOOP-13871.

  1. For public data, use curl:

    curl -O
  2. Use nettop to monitor a processes connections.

Consider reducing the connection timeout of the s3a connection.


This may cause the client to react faster to network pauses.