|  HADOOP-5192  | 
 Block reciever should not remove a finalized block when block replication fails  | 
  Blocker  | 
 .  | 
 Hairong Kuang  | 
 Hairong Kuang  | 
|  HADOOP-5134  | 
 FSNamesystem#commitBlockSynchronization adds under-construction block locations to blocksMap  | 
  Blocker  | 
 .  | 
 Hairong Kuang  | 
 dhruba borthakur  | 
|  HADOOP-5412  | 
 TestInjectionForSimulatedStorage occasionally fails on timeout  | 
  Major  | 
 .  | 
 Hairong Kuang  | 
 Hairong Kuang  | 
|  HADOOP-5311  | 
 Write pipeline recovery fails  | 
  Blocker  | 
 .  | 
 Hairong Kuang  | 
 dhruba borthakur  | 
|  HADOOP-5465  | 
 Blocks remain under-replicated  | 
  Blocker  | 
 .  | 
 Hairong Kuang  | 
 Hairong Kuang  | 
|  HADOOP-5557  | 
 Two minor problems in TestOverReplicatedBlocks  | 
  Minor  | 
 test  | 
 Tsz Wo Nicholas Sze  | 
 Tsz Wo Nicholas Sze  | 
|  HADOOP-5644  | 
 Namnode is stuck in safe mode  | 
  Major  | 
 .  | 
 Suresh Srinivas  | 
 Suresh Srinivas  | 
|  HADOOP-6017  | 
 NameNode and SecondaryNameNode fail to restart because of abnormal filenames.  | 
  Blocker  | 
 .  | 
 Raghu Angadi  | 
 Tsz Wo Nicholas Sze  |