| HADOOP-6576 | TestStreamingStatus is failing on 0.20 branch | Major | . | Chris Douglas | Todd Lipcon |
| HADOOP-6575 | Tests do not run on 0.20 branch | Major | . | Chris Douglas | Chris Douglas |
| HADOOP-6524 | Contrib tests are failing Clover'ed build | Major | build | Konstantin Boudnik | Konstantin Boudnik |
| HADOOP-6506 | Failing tests prevent the rest of test targets from execution. | Major | build | Konstantin Boudnik | Konstantin Boudnik |
| HADOOP-6498 | IPC client bug may cause rpc call hang | Blocker | ipc | Ruyue Ma | Ruyue Ma |
| HADOOP-6460 | Namenode runs of out of memory due to memory leak in ipc Server | Blocker | . | Suresh Srinivas | Suresh Srinivas |
| HADOOP-6428 | HttpServer sleeps with negative values | Major | . | Tsz Wo Nicholas Sze | Konstantin Boudnik |
| HADOOP-6315 | GzipCodec should not represent BuiltInZlibInflater as decompressorType | Major | io | Aaron Kimball | Aaron Kimball |
| HADOOP-6269 | Missing synchronization for defaultResources in Configuration.addResource | Major | conf | Todd Lipcon | Sreekanth Ramakrishnan |
| HADOOP-6231 | Allow caching of filesystem instances to be disabled on a per-instance basis | Major | fs | Tom White | Ben Slusky |
| HADOOP-6097 | Multiple bugs w/ Hadoop archives | Major | fs | Ben Slusky | Ben Slusky |
| HADOOP-5759 | IllegalArgumentException when CombineFileInputFormat is used as job InputFormat | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
| HADOOP-5623 | Streaming: process provided status messages are overwritten every 10 seoncds | Major | . | Rick Cox | Rick Cox |
| HADOOP-5612 | Some c++ scripts are not chmodded before ant execution | Major | build | Todd Lipcon | Todd Lipcon |
| HADOOP-5611 | C++ libraries do not build on Debian Lenny | Critical | . | Todd Lipcon | Todd Lipcon |
| HDFS-927 | DFSInputStream retries too many times for new block locations | Critical | hdfs-client | Todd Lipcon | Todd Lipcon |
| HDFS-872 | DFSClient 0.20.1 is incompatible with HDFS 0.20.2 | Major | datanode, hdfs-client | Bassam Tabbara | Todd Lipcon |
| HDFS-781 | Metrics PendingDeletionBlocks is not decremented | Blocker | namenode | Suresh Srinivas | Suresh Srinivas |
| HDFS-761 | Failure to process rename operation from edits log due to quota verification | Major | namenode | Suresh Srinivas | Suresh Srinivas |
| HDFS-745 | TestFsck timeout on 0.20. | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
| HDFS-732 | HDFS files are ending up truncated | Blocker | hdfs-client | Christian Kunz | Tsz Wo Nicholas Sze |
| HDFS-723 | Deadlock in DFSClient#DFSOutputStream | Blocker | . | Hairong Kuang | Hairong Kuang |
| HDFS-677 | Rename failure due to quota results in deletion of src directory | Blocker | namenode | Suresh Srinivas | Suresh Srinivas |
| HDFS-596 | Memory leak in libhdfs: hdfsFreeFileInfo() in libhdfs does not free memory for mOwner and mGroup | Blocker | fuse-dfs | Zhang Bingjun | Zhang Bingjun |
| HDFS-579 | HADOOP-3792 update of DfsTask incomplete | Major | hdfs-client | Christian Kunz | Christian Kunz |
| HDFS-187 | TestStartup fails if hdfs is running in the same machine | Major | test | Tsz Wo Nicholas Sze | Todd Lipcon |
| HDFS-185 | Chown , chgrp , chmod operations allowed when namenode is in safemode . | Major | . | Ravi Phulari | Ravi Phulari |
| HDFS-101 | DFS write pipeline : DFSClient sometimes does not detect second datanode failure | Blocker | datanode | Raghu Angadi | Hairong Kuang |
| MAPREDUCE-1251 | c++ utils doesn't compile | Major | . | Eli Collins | Eli Collins |
| MAPREDUCE-1182 | Reducers fail with OutOfMemoryError while copying Map outputs | Blocker | . | Chandra Prakash Bhagtani | Chandra Prakash Bhagtani |
| MAPREDUCE-1163 | hdfsJniHelper.h: Yahoo! specific paths are encoded | Trivial | . | Allen Wittenauer | Allen Wittenauer |
| MAPREDUCE-1147 | Map output records counter missing for map-only jobs in new API | Blocker | . | Chris Douglas | Amar Kamat |
| MAPREDUCE-1070 | Deadlock in FairSchedulerServlet | Major | . | Todd Lipcon | Todd Lipcon |
| MAPREDUCE-1068 | In hadoop-0.20.0 streaming job do not throw proper verbose error message if file is not present | Major | contrib/streaming | Peeyush Bishnoi | Amareshwari Sriramadasu |
| MAPREDUCE-1010 | Adding tests for changes in archives. | Minor | harchive | Mahadev konar | Mahadev konar |
| MAPREDUCE-979 | JobConf.getMemoryFor{Map|Reduce}Task doesn't fallback to newer config knobs when mapred.taskmaxvmem is set to DISABLED_MEMORY_LIMIT of -1 | Blocker | jobtracker, tasktracker | Arun C Murthy | Sreekanth Ramakrishnan |
| MAPREDUCE-826 | harchive doesn't use ToolRunner / harchive returns 0 even if the job fails with exception | Trivial | harchive | Koji Noguchi | Koji Noguchi |
| MAPREDUCE-617 | Streaming should not throw java.lang.RuntimeException and ERROR while displaying help | Minor | contrib/streaming | Karam Singh | |
| MAPREDUCE-433 | TestReduceFetch failed. | Major | . | Tsz Wo Nicholas Sze | Chris Douglas |
| MAPREDUCE-112 | Reduce Input Records and Reduce Output Records counters are not being set when using the new Mapreduce reducer API | Blocker | . | Jothi Padmanabhan | Jothi Padmanabhan |