| HADOOP-5665 | Namenode could not be formatted because the “whoami” program could not be run. | Major | . | Evelyn Sylvia | |
| HADOOP-5268 | Using MultipleOutputFormat and setting reducers to 0 causes org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException and job to fail | Major | . | Thibaut | |
| HADOOP-5193 | SecondaryNameNode does not rollImage because of incorrect calculation of edits modification time. | Major | . | Konstantin Shvachko | Konstantin Shvachko |
| HADOOP-5192 | Block reciever should not remove a finalized block when block replication fails | Blocker | . | Hairong Kuang | Hairong Kuang |
| HADOOP-5166 | JobTracker fails to restart if recovery and ACLs are enabled | Blocker | . | Karam Singh | Amar Kamat |
| HADOOP-5161 | Accepted sockets do not get placed in DataXceiverServer#childSockets | Major | . | Hairong Kuang | Hairong Kuang |
| HADOOP-5156 | TestHeartbeatHandling uses MiniDFSCluster.getNamesystem() which does not exist in branch 0.20 | Major | test | Konstantin Shvachko | Hairong Kuang |
| HADOOP-5134 | FSNamesystem#commitBlockSynchronization adds under-construction block locations to blocksMap | Blocker | . | Hairong Kuang | dhruba borthakur |
| HADOOP-5067 | Failed/Killed attempts column in jobdetails.jsp does not show the number of failed/killed attempts correctly | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
| HADOOP-5009 | DataNode#shutdown sometimes leaves data block scanner verification log unclosed | Major | . | Hairong Kuang | Hairong Kuang |
| HADOOP-5008 | TestReplication#testPendingReplicationRetry leaves an opened fd unclosed | Major | test | Hairong Kuang | Hairong Kuang |
| HADOOP-5002 | 2 core tests TestFileOutputFormat and TestHarFileSystem are failing in branch 19 | Blocker | . | Ravi Gummadi | Amareshwari Sriramadasu |
| HADOOP-4992 | TestCustomOutputCommitter fails on hadoop-0.19 | Blocker | . | Amar Kamat | Amareshwari Sriramadasu |
| HADOOP-4983 | Job counters sometimes go down as tasks run without task failures | Critical | . | Owen O'Malley | Amareshwari Sriramadasu |
| HADOOP-4982 | TestFsck does not run in Eclipse. | Major | test | Konstantin Shvachko | Konstantin Shvachko |
| HADOOP-4967 | Inconsistent state in JVM manager | Major | . | Amareshwari Sriramadasu | Devaraj Das |
| HADOOP-4966 | Setup tasks are not removed from JobTracker's taskIdToTIPMap even after the job completes | Major | . | Amar Kamat | Amareshwari Sriramadasu |
| HADOOP-4965 | DFSClient should log instead of printing into std err. | Major | test | Konstantin Shvachko | Konstantin Shvachko |
| HADOOP-4955 | Make DBOutputFormat us column names from setOutput(...) | Major | . | Kevin Peterson | Kevin Peterson |
| HADOOP-4943 | fair share scheduler does not utilize all slots if the task trackers are configured heterogeneously | Major | . | Zheng Shao | Zheng Shao |
| HADOOP-4924 | Race condition in re-init of TaskTracker | Blocker | . | Devaraj Das | Devaraj Das |
| HADOOP-4918 | Fix bzip2 work with SequenceFile | Major | io | Zheng Shao | Zheng Shao |
| HADOOP-4906 | TaskTracker running out of memory after running several tasks | Blocker | . | Arun C Murthy | Sharad Agarwal |
| HADOOP-4862 | A spurious IOException log on DataNode is not completely removed | Blocker | . | Raghu Angadi | Raghu Angadi |
| HADOOP-4847 | OutputCommitter is loaded in the TaskTracker in localizeConfiguration | Blocker | . | Owen O'Malley | Amareshwari Sriramadasu |
| HADOOP-4836 | Minor typos in documentation and comments | Trivial | documentation | Jordà Polo | Jordà Polo |
| HADOOP-4821 | Usage description in the Quotas guide documentations are incorrect | Minor | documentation | Boris Shkolnik | Boris Shkolnik |
| HADOOP-4797 | RPC Server can leave a lot of direct buffers | Blocker | ipc | Raghu Angadi | Raghu Angadi |
| HADOOP-4760 | HDFS streams should not throw exceptions when closed twice | Major | fs, fs/s3 | Alejandro Abdelnur | Enis Soztutar |
| HADOOP-4759 | HADOOP-4654 to be fixed for branches >= 0.19 | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
| HADOOP-4731 | Job is not removed from the waiting jobs queue upon completion. | Major | . | Hemanth Yamijala | Amar Kamat |
| HADOOP-4727 | Groups do not work for fuse-dfs out of the box on 0.19.0 | Blocker | . | Brian Bockelman | Brian Bockelman |
| HADOOP-4720 | docs/api does not contain the hdfs directory after building | Major | build | Ramya Sunil | |
| HADOOP-4697 | KFS::getBlockLocations() fails with files having multiple blocks | Major | fs | Lohit Vijayarenu | Sriram Rao |
| HADOOP-4635 | Memory leak ? | Blocker | . | Marc-Olivier Fleury | Pete Wyckoff |
| HADOOP-4632 | TestJobHistoryVersion should not create directory in current dir. | Major | . | Amareshwari Sriramadasu | Amar Kamat |
| HADOOP-4616 | assertion makes fuse-dfs exit when reading incomplete data | Blocker | . | Marc-Olivier Fleury | Pete Wyckoff |
| HADOOP-4508 | FSDataOutputStream.getPos() == 0when appending to existing file and should be file length | Major | fs | Pete Wyckoff | dhruba borthakur |
| HADOOP-4494 | libhdfs does not call FileSystem.append when O_APPEND passed to hdfsOpenFile | Major | . | Pete Wyckoff | Pete Wyckoff |
| HADOOP-4420 | JobTracker.killJob() doesn't check for the JobID being valid | Minor | . | Steve Loughran | Aaron Kimball |