| HADOOP-6925 | BZip2Codec incorrectly implements read() | Critical | io | Todd Lipcon | Todd Lipcon | 
| HADOOP-6833 | IPC leaks call parameters when exceptions thrown | Blocker | . | Todd Lipcon | Todd Lipcon | 
| MAPREDUCE-1897 | trunk build broken on compile-mapred-test | Major | test | Greg Roelofs | Konstantin Boudnik | 
| MAPREDUCE-2032 | TestJobOutputCommitter fails in ant test run | Major | task | Amareshwari Sriramadasu | Dick King | 
| HDFS-1363 | startFileInternal should return the last block of the file opened for append as an under-construction block | Major | . | Konstantin Shvachko | Konstantin Shvachko | 
| HDFS-1411 | The startup command of the Backup Node is “bin/hdfs namenode -backup” | Minor | documentation | Ching-Shen Chen | Ching-Shen Chen | 
| MAPREDUCE-1280 | Eclipse Plugin does not work with Eclipse Ganymede (3.4) | Major | . | Aaron Kimball | Alex Kozlov | 
| HDFS-1413 | Broken links to HDFS Wiki in hdfs site and documentation. | Major | documentation | Konstantin Shvachko | Konstantin Shvachko | 
| MAPREDUCE-1984 | herriot TestCluster fails because exclusion is not there | Major | . | Balaji Rajagopalan | Balaji Rajagopalan | 
| HADOOP-6971 | Clover build doesn’t generate per-test coverage | Major | build, test | Konstantin Boudnik | Konstantin Boudnik | 
| HDFS-1420 | Clover build doesn’t generate per-test coverage | Major | build, test | Konstantin Boudnik | Konstantin Boudnik | 
| MAPREDUCE-2090 | Clover build doesn’t generate per-test coverage | Major | build, test | Konstantin Boudnik | Konstantin Boudnik | 
| HADOOP-6969 | CHANGES.txt does not reflect the release of version 0.21.0. | Major | . | Konstantin Shvachko | Tom White | 
| HDFS-1416 | CHANGES.txt does not reflect the release version 0.21.0. | Major | . | Konstantin Shvachko | Tom White | 
| MAPREDUCE-2086 | CHANGES.txt does not reflect the release of version 0.21.0. | Major | . | Konstantin Shvachko | Tom White | 
| HADOOP-6993 | Broken link on cluster setup page of docs | Major | documentation | Aaron T. Myers | Eli Collins | 
| HDFS-1444 | Test related code of build.xml is error-prone and needs to be re-aligned. | Minor | build | Konstantin Boudnik | Konstantin Boudnik | 
| HDFS-1452 | ant compile-contrib is broken | Major | contrib/hdfsproxy | Jakob Homan | Konstantin Boudnik | 
| MAPREDUCE-2134 | ant binary-system is broken in mapreduce project. | Major | build | Vinay Kumar Thota | Konstantin Boudnik | 
| HDFS-1474 | ant binary-system is broken | Major | build | Konstantin Boudnik | Konstantin Boudnik | 
| HADOOP-6954 | Sources JARs are not correctly published to the Maven repository | Major | build | Tom White | Tom White | 
| HADOOP-7052 | misspelling of threshold in conf/log4j.properties | Major | conf | Jingguo Yao | Jingguo Yao | 
| HADOOP-7053 | wrong FSNamesystem Audit logging setting in conf/log4j.properties | Minor | conf | Jingguo Yao | Jingguo Yao | 
| HDFS-1377 | Quota bug for partial blocks allows quotas to be violated | Blocker | namenode | Eli Collins | Eli Collins | 
| HDFS-1206 | TestFiHFlush fails intermittently | Major | test | Tsz Wo Nicholas Sze | Konstantin Boudnik | 
| MAPREDUCE-2223 | TestMRCLI might fail on Ubuntu with default /etc/hosts | Minor | test | Konstantin Boudnik | Konstantin Boudnik | 
| HDFS-1548 | Fault-injection tests are executed multiple times if invoked with run-test-hdfs-fault-inject target | Major | build, test | Konstantin Boudnik | Konstantin Boudnik | 
| HDFS-1552 | Remove java5 dependencies from build | Major | build | Konstantin Boudnik | Konstantin Boudnik | 
| MAPREDUCE-2228 | Remove java5 dependencies from build | Major | build | Konstantin Boudnik | Konstantin Boudnik | 
| MAPREDUCE-1929 | Allow artifacts to be published to the staging Apache Nexus Maven Repository | Blocker | build | Tom White | Tom White | 
| HDFS-996 | JUnit tests should never depend on anything in conf | Blocker | test | Konstantin Boudnik | Konstantin Boudnik | 
| HADOOP-7120 | 200 new Findbugs warnings | Major | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-1598 | ListPathsServlet excludes .*.crc files | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-1612 | HDFS Design Documentation is outdated | Minor | documentation | Joe Crobak | Joe Crobak | 
| HADOOP-7162 | FsShell: call srcFs.listStatus(src) twice | Minor | fs | Alexey Diomin | Alexey Diomin | 
| HDFS-1665 | Balancer sleeps inadequately | Minor | balancer & mover | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-1728 | SecondaryNameNode.checkpointSize is in byte but not MB. | Minor | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-1750 | fs -ls hftp://file not working | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HADOOP-7174 | null is displayed in the console,if the src path is invalid while doing copyToLocal operation from commandLine | Minor | fs | Uma Maheswara Rao G | Uma Maheswara Rao G | 
| HADOOP-7194 | Potential Resource leak in IOUtils.java | Major | io | Devaraj K | Devaraj K | 
| HADOOP-7019 | Refactor build targets to enable faster cross project dev cycles. | Major | build | Owen O’Malley | Luke Lu | 
| HDFS-1189 | Quota counts missed between clear quota and set quota | Major | namenode | Kang Xiao | John George | 
| MAPREDUCE-2317 | HadoopArchives throwing NullPointerException while creating hadoop archives (.har files) | Minor | harchive | Devaraj K | Devaraj K | 
| HADOOP-7183 | WritableComparator.get should not cache comparator objects | Blocker | . | Todd Lipcon | Tom White | 
| HADOOP-7215 | RPC clients must connect over a network interface corresponding to the host name in the client’s kerberos principal key | Blocker | security | Suresh Srinivas | Suresh Srinivas |