| HADOOP-1452 | map output transfers of more than 2^31 bytes output are failing | Blocker | . | Christian Kunz | Owen O'Malley |
| HADOOP-1435 | FileSystem.globPaths should not create a Path from an empty string | Blocker | fs | Hairong Kuang | Hairong Kuang |
| HADOOP-1431 | Map tasks can't timeout for failing to call progress | Blocker | . | Owen O'Malley | Arun C Murthy |
| HADOOP-1427 | Typo in GzipCodec.createInputStream - bufferSize | Blocker | io | Espen Amble Kolstad | Espen Amble Kolstad |
| HADOOP-1411 | AlreadyBeingCreatedException from task retries | Blocker | . | Nigel Daley | Hairong Kuang |
| HADOOP-1407 | Failed tasks not killing job | Blocker | . | Nigel Daley | Arun C Murthy |
| HADOOP-1388 | Possible Null Pointer Dereference in taskdetails.jsp | Major | . | Devaraj Das | Devaraj Das |
| HADOOP-1386 | The constructor of Path should not take an empty string as a parameter | Blocker | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1385 | MD5Hash has a bad hash function | Major | io | Owen O'Malley | Owen O'Malley |
| HADOOP-1369 | Inconsistent synchronization of TaskTracker fields | Blocker | . | Nigel Daley | Owen O'Malley |
| HADOOP-1368 | Inconsistent synchronization of 3 fields in JobInProgress.java | Blocker | . | Nigel Daley | Owen O'Malley |
| HADOOP-1363 | waitForCompletion() calls Thread.sleep() with a lock held | Blocker | . | Nigel Daley | Owen O'Malley |
| HADOOP-1361 | seek calls in 3 io classes ignore result of skipBytes(int) | Blocker | io | Nigel Daley | Hairong Kuang |
| HADOOP-1358 | seek call ignores result of skipBytes(int) | Blocker | . | Nigel Daley | Hairong Kuang |
| HADOOP-1356 | ValueHistogram.addNextValue(Object) ignores return value of String.substring(int, int) | Blocker | . | Nigel Daley | Runping Qi |
| HADOOP-1354 | Null pointer dereference of paths in FsShell.dus(String) | Blocker | fs | Nigel Daley | Hairong Kuang |
| HADOOP-1353 | Null pointer dereference of nodeInfo in FSNamesystem.removeDatanode(DatanodeID) | Blocker | . | Nigel Daley | dhruba borthakur |
| HADOOP-1350 | Shuffle started taking a very long time after the HADOOP-1176 fix | Blocker | . | Devaraj Das | Devaraj Das |
| HADOOP-1345 | Checksum object does not get restored to the old state in retries when handle ChecksumException | Blocker | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1332 | Sporadic unit test failures (TestMiniMRClasspath, TestMiniMRLocalFS, TestMiniMRDFSCaching) | Blocker | . | Nigel Daley | Arun C Murthy |
| HADOOP-1322 | Tasktracker blacklist leads to hung jobs in single-node cluster | Critical | . | Arun C Murthy | Arun C Murthy |
| HADOOP-1312 | heartbeat monitor thread goes away | Blocker | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1310 | Fix unchecked warnings in aggregate code | Major | . | Tom White | Tom White |
| HADOOP-1299 | Once RPC.stopClient has been called, RPC can not be used again | Minor | ipc | stack | stack |
| HADOOP-1297 | datanode sending block reports to namenode once every second | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1294 | Fix unchecked warnings in main Hadoop code under Java 6. | Major | test | Tom White | Tom White |
| HADOOP-1293 | stderr from streaming skipped after first 20 lines. | Minor | . | Koji Noguchi | Koji Noguchi |
| HADOOP-1279 | list of completed jobs purges jobs based on submission not on completion age | Major | . | Alejandro Abdelnur | Arun C Murthy |
| HADOOP-1278 | Fix the per-job tasktracker ‘blacklist’ | Major | . | Arun C Murthy | Arun C Murthy |
| HADOOP-1275 | job notification property in hadoop-default.xml is misspelled | Trivial | . | Alejandro Abdelnur | |
| HADOOP-1272 | Extract InnerClasses from FSNamesystem into separate classes | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1271 | The StreamBaseRecordReader is unable to log record data that's not UTF-8 | Minor | . | Gautam Kowshik | Arun C Murthy |
| HADOOP-1262 | file corruption detected because dfs client does not use replica blocks for checksum file | Major | . | dhruba borthakur | Hairong Kuang |
| HADOOP-1258 | TestCheckpoint test case doesn't wait for MiniDFSCluster to be active | Trivial | test | Nigel Daley | Nigel Daley |
| HADOOP-1256 | Dfs image loading and edits loading creates multiple instances of DatanodeDescriptor for the same datanode | Major | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1255 | Name-node falls into infinite loop trying to remove a dead node. | Blocker | . | Konstantin Shvachko | Hairong Kuang |
| HADOOP-1253 | ConcurrentModificationException and NPE in JobControl | Minor | . | Johan Oskarsson | Johan Oskarsson |
| HADOOP-1252 | Disk problems should be handled better by the MR framework | Major | . | Devaraj Das | Devaraj Das |
| HADOOP-1244 | stop-dfs.sh incorrectly specifies slaves file for stopping datanode | Minor | . | Michael Bieniosek | dhruba borthakur |
| HADOOP-1243 | ClientProtocol.versionID should be 11 | Major | . | Konstantin Shvachko | dhruba borthakur |
| HADOOP-1242 | dfs upgrade/downgrade problems | Blocker | . | Owen O'Malley | Konstantin Shvachko |
| HADOOP-1241 | Null PointerException in processReport when namenode is restarted | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1239 | Classes in src/test/testjar need package name | Trivial | test | Jim Kellerman | Jim Kellerman |
| HADOOP-1238 | maps_running metric is only updated at the end of the task | Minor | metrics | Michael Bieniosek | David Bowen |
| HADOOP-1224 | “Browse the filesystem” link pointing to a dead data-node | Major | . | Konstantin Shvachko | Enis Soztutar |
| HADOOP-1219 | Spurious progress messages should be discarded after a task is done | Major | . | Devaraj Das | Devaraj Das |
| HADOOP-1218 | In TaskTracker the access to RunningJob object is not synchronized in one place | Major | . | Devaraj Das | Devaraj Das |
| HADOOP-1211 | Remove deprecated constructor and unused static members in DataNode class | Major | . | Konstantin Shvachko | Konstantin Shvachko |
| HADOOP-1205 | The open method of FSNamesystem should be synchronized | Blocker | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1204 | Re-factor InputFormat/RecordReader related classes | Major | . | Runping Qi | Runping Qi |
| HADOOP-1203 | UpgradeUtilities should use MiniDFSCluster to start and stop NameNode/DataNodes | Major | test | Nigel Daley | Nigel Daley |
| HADOOP-1200 | Datanode should periodically do a disk check | Blocker | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1198 | ipc.client.timeout of 2000ms for test cases seems too small; causes too many timeouts and leads to hung test cases | Major | test | Arun C Murthy | Arun C Murthy |
| HADOOP-1189 | Still seeing some unexpected ‘No space left on device’ exceptions | Major | . | Raghu Angadi | Raghu Angadi |
| HADOOP-1187 | DFS Scalability: avoid scanning entire list of datanodes in getAdditionalBlocks | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1184 | Decommission fails if a block that needs replication has only one replica | Major | . | dhruba borthakur | |
| HADOOP-1178 | NullPointer Exception in org.apache.hadoop.dfs.NameNode.isDir on namenode restart | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1176 | Reduce hang on huge map output | Major | . | Hairong Kuang | Arun C Murthy |
| HADOOP-1170 | Very high CPU usage on data nodes because of FSDataset.checkDataDir() on every connect | Major | . | Igor Bolotin | |
| HADOOP-1169 | CopyFiles skips src files of s3 urls | Minor | util | stack | |
| HADOOP-1164 | TestReplicationPolicy doesn't use port 0 for the NameNode | Major | test | Owen O'Malley | Owen O'Malley |
| HADOOP-1163 | Ganglia metrics reporting is misconfigured | Minor | metrics | Michael Bieniosek | |
| HADOOP-1160 | DistributedFileSystem doesn't close the RawDistributedFileSystem on close. | Blocker | . | Owen O'Malley | Hairong Kuang |
| HADOOP-1156 | NullPointerException in MiniDFSCluster | Major | . | Konstantin Shvachko | Hairong Kuang |
| HADOOP-1154 | streaming hang. (PipeMapRed$MROutputThread gone) | Major | . | Koji Noguchi | Koji Noguchi |
| HADOOP-1153 | DataNode and FSNamesystem don't shutdown cleanly | Major | . | Nigel Daley | Konstantin Shvachko |
| HADOOP-1152 | Reduce task hang failing in MapOutputCopier.copyOutput | Major | . | Koji Noguchi | Tahir Hashmi |
| HADOOP-1151 | streaming PipeMapRed prints system info to stderr | Trivial | . | Koji Noguchi | Koji Noguchi |
| HADOOP-1149 | DFS Scalability: high cpu usage in addStoredBlock | Major | . | dhruba borthakur | Raghu Angadi |
| HADOOP-1146 | “Reduce input records” counter name is misleading | Major | . | David Bowen | David Bowen |
| HADOOP-1137 | StatusHttpServer assumes that resources for /static are in files | Major | . | Benjamin Reed | |
| HADOOP-1136 | exception in UnderReplicatedBlocks:add when ther are more replicas of a block than required | Major | . | dhruba borthakur | Hairong Kuang |
| HADOOP-1122 | Divide-by-zero exception in chooseTarget | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1114 | bin/hadoop script clobbers CLASSPATH | Minor | scripts | Michael Bieniosek | Doug Cutting |
| HADOOP-1110 | JobTracker WebUI “Map input records” a little off. | Trivial | . | Koji Noguchi | David Bowen |
| HADOOP-1093 | NNBench generates millions of NotReplicatedYetException in Namenode log | Major | . | Nigel Daley | dhruba borthakur |
| HADOOP-1090 | In SortValidator, the check for whether a file belongs to sort-input or sort-output dir is weak | Major | . | Devaraj Das | Arun C Murthy |
| HADOOP-1085 | Remove ‘port rolling’ from Mini{DFS|MR}Cluster | Major | test | Arun C Murthy | Arun C Murthy |
| HADOOP-1081 | JAVA_PLATFORM with spaces (i.e. Mac OS X-ppc-32) breaks bin/hadoop script | Major | scripts | Andrzej Bialecki | |
| HADOOP-1073 | DFS Scalability: high CPU usage in choosing replication targets and file open | Major | . | dhruba borthakur | Hairong Kuang |
| HADOOP-1071 | RPC$VersionMismatch exception is not fatal to JobTracker | Major | . | Nigel Daley | Tahir Hashmi |
| HADOOP-1064 | dfsclient logging messages should have appropriate log levels | Major | . | dhruba borthakur | dhruba borthakur |
| HADOOP-1063 | MiniDFSCluster exists a race condition that lead to data node resources are not properly released | Major | test | Hairong Kuang | Hairong Kuang |
| HADOOP-1061 | S3 listSubPaths bug | Critical | fs | Mike Smith | |
| HADOOP-1050 | Do not count lost tasktracker against the job | Major | . | Arun C Murthy | Arun C Murthy |
| HADOOP-1047 | TestReplication fails because DFS does not guarantee all the replicas are placed when a file is closed | Major | . | Hairong Kuang | Hairong Kuang |
| HADOOP-1011 | ConcurrentModificationException in JobHistory | Major | . | Nigel Daley | Tahir Hashmi |
| HADOOP-1001 | the output of the map is not type checked against the specified types | Major | . | Owen O'Malley | Tahir Hashmi |
| HADOOP-672 | dfs shell enhancements | Minor | . | Yoram Arnon | dhruba borthakur |