| HADOOP-849 | randomwriter fails with ‘java.lang.OutOfMemoryError: Java heap space’ in the ‘reduce’ task | Major | . | Arun C Murthy | Devaraj Das |
| HADOOP-846 | Progress report is not sent during the intermediate sorts in the map phase | Major | . | Devaraj Das | Devaraj Das |
| HADOOP-844 | Metrics messages are sent on a fixed-delay schedule instead of a fixed-rate schedule | Minor | metrics | David Bowen | |
| HADOOP-841 | native hadoop libraries don't build properly with 64-bit OS and a 32-bit jvm | Major | build | Arun C Murthy | Arun C Murthy |
| HADOOP-840 | the task tracker is getting blocked by long deletes of local files | Major | . | Owen O'Malley | Mahadev konar |
| HADOOP-838 | TaskRunner.run() doesn't pass along the ‘java.library.path’ to the child (task) jvm | Major | . | Arun C Murthy | Arun C Murthy |
| HADOOP-836 | unit tests fail on windows (/C:/cygwin/... is invalid) | Major | . | Owen O'Malley | Owen O'Malley |
| HADOOP-835 | conf not set for the default Codec when initializing a Reader for a record-compressed sequence file | Major | io | Hairong Kuang | Hairong Kuang |
| HADOOP-829 | Separate the datanode contents that is written to the fsimage vs the contents used in over-the-wire communication | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-825 | If the default file system is set using the new uri syntax, the namenode will not start | Major | . | Owen O'Malley | Owen O'Malley |
| HADOOP-824 | DFSShell should become FSShell | Major | . | Doug Cutting | |
| HADOOP-823 | DataNode will not start up if any directories from dfs.data.dir are missing | Major | . | Bryan Pendleton | Sameer Paranjpye |
| HADOOP-818 | ant clean test-contrib doesn't work | Major | . | Owen O'Malley | Owen O'Malley |
| HADOOP-814 | Increase dfs scalability by optimizing locking on namenode. | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-813 | map tasks lost during sort | Major | . | Owen O'Malley | Devaraj Das |
| HADOOP-802 | mapred.speculative.execution description in hadoop-defauls.xml is not complete | Trivial | conf | Nigel Daley | Nigel Daley |
| HADOOP-794 | JobTracker crashes with ArithmeticException | Major | . | Nigel Daley | Owen O'Malley |
| HADOOP-792 | Invalid dfs -mv can trash your entire dfs | Major | . | Chris Schneider | |
| HADOOP-786 | PhasedFileSystem should use debug level log for ignored exception. | Trivial | . | Sanjay Dahiya | Sanjay Dahiya |
| HADOOP-782 | TaskTracker.java:killOverflowingTasks & TaskTracker.java:markUnresponsiveTasks only put the tip in tasksToCleanup queue, they don't update the runningJobs | Major | . | Arun C Murthy | Arun C Murthy |
| HADOOP-777 | the tasktracker hostname is not fully qualified | Minor | . | Mahadev konar | Mahadev konar |
| HADOOP-774 | Datanodes fails to heartbeat when a directory with a large number of blocks is deleted | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-770 | When JobTracker gets restarted, Job Tracker History doesn't show the jobs that were running. (incomplete jobs) | Minor | . | Koji Noguchi | Sanjay Dahiya |
| HADOOP-764 | The memory consumption of processReport() in the namenode can be reduced | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-752 | Possible locking issues in HDFS Namenode | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-745 | NameNode throws FileNotFoundException: Parent path does not exist on startup | Major | . | Nigel Daley | dhruba borthakur |
| HADOOP-738 | dfs get or copyToLocal should not copy crc file | Major | . | Milind Bhandarkar | Milind Bhandarkar |
| HADOOP-737 | TaskTracker's job cleanup loop should check for finished job before deleting local directories | Critical | . | Sanjay Dahiya | Arun C Murthy |
| HADOOP-700 | bin/hadoop includes in classpath all jar files in HADOOP_HOME | Major | scripts | Nigel Daley | Doug Cutting |
| HADOOP-673 | the task execution environment should have a current working directory that is task specific | Major | . | Owen O'Malley | Mahadev konar |
| HADOOP-629 | none of the rpc servers check the protcol name for validity | Major | ipc | Owen O'Malley | Owen O'Malley |
| HADOOP-628 | hadoop hdfs -cat replaces some characters with question marks. | Major | . | arkady borkovsky | Wendy Chien |
| HADOOP-596 | TaskTracker taskstatus's phase doesnt get updated on phase transition causing wrong values displayed in WI | Major | . | Sanjay Dahiya | Sanjay Dahiya |
| HADOOP-546 | Task tracker doesnt generate job.xml in jobcache for some tasks ( possibly for only rescheduled tasks) | Critical | . | Sanjay Dahiya | Arun C Murthy |