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Posted to common-commits@hadoop.apache.org by wa...@apache.org on 2016/03/10 04:40:36 UTC
[37/49] hadoop git commit: HADOOP-11791. Update
src/site/markdown/releases to include old versions of Hadoop (aw)
http://git-wip-us.apache.org/repos/asf/hadoop/blob/140a33df/hadoop-common-project/hadoop-common/src/site/markdown/release/0.19.0/CHANGES.0.19.0.md
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+
+<!---
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+-->
+# Apache Hadoop Changelog
+
+## Release 0.19.0 - 2008-11-20
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4430](https://issues.apache.org/jira/browse/HADOOP-4430) | Namenode Web UI capacity report is inconsistent with Balancer | Blocker | . | Suresh Srinivas | Suresh Srinivas |
+| [HADOOP-4293](https://issues.apache.org/jira/browse/HADOOP-4293) | Remove WritableJobConf | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4281](https://issues.apache.org/jira/browse/HADOOP-4281) | Capacity reported in some of the commands is not consistent with the Web UI reported data | Blocker | . | Suresh Srinivas | Suresh Srinivas |
+| [HADOOP-4227](https://issues.apache.org/jira/browse/HADOOP-4227) | Remove the deprecated, unused class ShellCommand. | Minor | fs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4190](https://issues.apache.org/jira/browse/HADOOP-4190) | Changes to JobHistory makes it backward incompatible | Blocker | . | Amar Kamat | Amar Kamat |
+| [HADOOP-4116](https://issues.apache.org/jira/browse/HADOOP-4116) | Balancer should provide better resource management | Blocker | . | Raghu Angadi | Hairong Kuang |
+| [HADOOP-3981](https://issues.apache.org/jira/browse/HADOOP-3981) | Need a distributed file checksum algorithm for HDFS | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3963](https://issues.apache.org/jira/browse/HADOOP-3963) | libhdfs should never exit on its own but rather return errors to the calling application | Minor | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3938](https://issues.apache.org/jira/browse/HADOOP-3938) | Quotas for disk space management | Major | . | Robert Chansler | Raghu Angadi |
+| [HADOOP-3911](https://issues.apache.org/jira/browse/HADOOP-3911) | ' -blocks ' option not being recognized | Minor | fs, util | Koji Noguchi | Lohit Vijayarenu |
+| [HADOOP-3889](https://issues.apache.org/jira/browse/HADOOP-3889) | distcp: Better Error Message should be thrown when accessing source files/directory with no read permission | Minor | . | Peeyush Bishnoi | Tsz Wo Nicholas Sze |
+| [HADOOP-3837](https://issues.apache.org/jira/browse/HADOOP-3837) | hadop streaming does not use progress reporting to detect hung tasks | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-3796](https://issues.apache.org/jira/browse/HADOOP-3796) | fuse-dfs should take rw,ro,trashon,trashoff,protected=blah mount arguments rather than them being compiled in | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3792](https://issues.apache.org/jira/browse/HADOOP-3792) | exit code from "hadoop dfs -test ..." is wrong for Unix shell | Minor | fs | Ben Slusky | Ben Slusky |
+| [HADOOP-3722](https://issues.apache.org/jira/browse/HADOOP-3722) | Provide a unified way to pass jobconf options from bin/hadoop | Minor | conf | Matei Zaharia | Enis Soztutar |
+| [HADOOP-3667](https://issues.apache.org/jira/browse/HADOOP-3667) | Remove deprecated methods in JobConf | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-3652](https://issues.apache.org/jira/browse/HADOOP-3652) | Remove deprecated class OutputFormatBase | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-3595](https://issues.apache.org/jira/browse/HADOOP-3595) | Remove deprecated mapred.combine.once functionality | Major | . | Chris Douglas | Chris Douglas |
+| [HADOOP-3245](https://issues.apache.org/jira/browse/HADOOP-3245) | Provide ability to persist running jobs (extend HADOOP-1876) | Major | . | Devaraj Das | Amar Kamat |
+| [HADOOP-3150](https://issues.apache.org/jira/browse/HADOOP-3150) | Move task file promotion into the task | Major | . | Owen O'Malley | Amareshwari Sriramadasu |
+| [HADOOP-3062](https://issues.apache.org/jira/browse/HADOOP-3062) | Need to capture the metrics for the network ios generate by dfs reads/writes and map/reduce shuffling and break them down by racks | Major | metrics | Runping Qi | Chris Douglas |
+| [HADOOP-2816](https://issues.apache.org/jira/browse/HADOOP-2816) | Cluster summary at name node web has confusing report for space utilization | Major | . | Robert Chansler | Suresh Srinivas |
+| [HADOOP-2325](https://issues.apache.org/jira/browse/HADOOP-2325) | Require Java 6 | Major | build | Doug Cutting | Doug Cutting |
+| [HADOOP-1869](https://issues.apache.org/jira/browse/HADOOP-1869) | access times of HDFS files | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-1700](https://issues.apache.org/jira/browse/HADOOP-1700) | Append to files in HDFS | Major | . | stack | dhruba borthakur |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4406](https://issues.apache.org/jira/browse/HADOOP-4406) | Make TCTLSeparatedProtocol configurable and have DynamicSerDe initialize, initialize the SerDe | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4301](https://issues.apache.org/jira/browse/HADOOP-4301) | Forrest doc for skip bad records feature | Blocker | documentation | Sharad Agarwal | Sharad Agarwal |
+| [HADOOP-4260](https://issues.apache.org/jira/browse/HADOOP-4260) | support show partitions in hive | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4176](https://issues.apache.org/jira/browse/HADOOP-4176) | Implement getFileChecksum(Path) in HftpFileSystem | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4120](https://issues.apache.org/jira/browse/HADOOP-4120) | [Hive] print time taken by query in interactive shell | Minor | . | Raghotham Murthy | Raghotham Murthy |
+| [HADOOP-4106](https://issues.apache.org/jira/browse/HADOOP-4106) | add time, permission and user attribute support to fuse-dfs | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4104](https://issues.apache.org/jira/browse/HADOOP-4104) | add time, permission and user attribute support to libhdfs | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4095](https://issues.apache.org/jira/browse/HADOOP-4095) | [Hive] enhance describe table & partition | Major | . | Prasad Chakka | Namit Jain |
+| [HADOOP-4086](https://issues.apache.org/jira/browse/HADOOP-4086) | Add limit to Hive QL | Major | . | Ashish Thusoo | Namit Jain |
+| [HADOOP-4084](https://issues.apache.org/jira/browse/HADOOP-4084) | Add explain plan capabilities to Hive QL | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4070](https://issues.apache.org/jira/browse/HADOOP-4070) | [Hive] Provide a mechanism for registering UDFs from the query language | Major | . | Tom White | Tom White |
+| [HADOOP-3992](https://issues.apache.org/jira/browse/HADOOP-3992) | Synthetic Load Generator for NameNode testing | Major | . | Robert Chansler | Hairong Kuang |
+| [HADOOP-3941](https://issues.apache.org/jira/browse/HADOOP-3941) | Extend FileSystem API to return file-checksums/file-digests | Major | fs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3939](https://issues.apache.org/jira/browse/HADOOP-3939) | DistCp should support an option for deleting non-existing files. | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3924](https://issues.apache.org/jira/browse/HADOOP-3924) | Add a 'Killed' job status | Critical | . | Alejandro Abdelnur | Subru Krishnan |
+| [HADOOP-3873](https://issues.apache.org/jira/browse/HADOOP-3873) | DistCp should have an option for limiting the number of files/bytes being copied | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3854](https://issues.apache.org/jira/browse/HADOOP-3854) | org.apache.hadoop.http.HttpServer should support user configurable filter | Major | util | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3829](https://issues.apache.org/jira/browse/HADOOP-3829) | Narrown down skipped records based on user acceptable value | Major | . | Sharad Agarwal | Sharad Agarwal |
+| [HADOOP-3828](https://issues.apache.org/jira/browse/HADOOP-3828) | Write skipped records' bytes to DFS | Major | . | Sharad Agarwal | Sharad Agarwal |
+| [HADOOP-3754](https://issues.apache.org/jira/browse/HADOOP-3754) | Support a Thrift Interface to access files/directories in HDFS | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-3746](https://issues.apache.org/jira/browse/HADOOP-3746) | A fair sharing job scheduler | Minor | . | Matei Zaharia | Matei Zaharia |
+| [HADOOP-3730](https://issues.apache.org/jira/browse/HADOOP-3730) | add new JobConf constructor that disables loading default configurations | Major | conf | Alejandro Abdelnur | Alejandro Abdelnur |
+| [HADOOP-3714](https://issues.apache.org/jira/browse/HADOOP-3714) | Bash tab completion support | Trivial | scripts | Chris Smith | Chris Smith |
+| [HADOOP-3702](https://issues.apache.org/jira/browse/HADOOP-3702) | add support for chaining Maps in a single Map and after a Reduce [M\*/RM\*] | Major | . | Alejandro Abdelnur | Alejandro Abdelnur |
+| [HADOOP-3698](https://issues.apache.org/jira/browse/HADOOP-3698) | Implement access control for submitting jobs to queues in the JobTracker | Major | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-3695](https://issues.apache.org/jira/browse/HADOOP-3695) | [HOD] Have an ability to run multiple slaves per node | Major | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli |
+| [HADOOP-3585](https://issues.apache.org/jira/browse/HADOOP-3585) | Hardware Failure Monitoring in large clusters running Hadoop/HDFS | Minor | metrics | Ioannis Koltsidas | Ioannis Koltsidas |
+| [HADOOP-3485](https://issues.apache.org/jira/browse/HADOOP-3485) | fix writes | Minor | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3479](https://issues.apache.org/jira/browse/HADOOP-3479) | Implement configuration items useful for Hadoop resource manager (v1) | Major | conf | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-3445](https://issues.apache.org/jira/browse/HADOOP-3445) | Implementing core scheduler functionality in Resource Manager (V1) for Hadoop | Major | . | Vivek Ratan | Vivek Ratan |
+| [HADOOP-3402](https://issues.apache.org/jira/browse/HADOOP-3402) | Add example code to support run terasort on hadoop | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-3361](https://issues.apache.org/jira/browse/HADOOP-3361) | Implement renames for NativeS3FileSystem | Major | fs/s3 | Tom White | Tom White |
+| [HADOOP-3149](https://issues.apache.org/jira/browse/HADOOP-3149) | supporting multiple outputs for M/R jobs | Major | . | Alejandro Abdelnur | Alejandro Abdelnur |
+| [HADOOP-3019](https://issues.apache.org/jira/browse/HADOOP-3019) | want input sampler & sorted partitioner | Major | . | Doug Cutting | Chris Douglas |
+| [HADOOP-2664](https://issues.apache.org/jira/browse/HADOOP-2664) | lzop-compatible CompresionCodec | Major | io | Chris Douglas | Chris Douglas |
+| [HADOOP-2658](https://issues.apache.org/jira/browse/HADOOP-2658) | Design and Implement a Test Plan to support appends to HDFS files | Blocker | test | dhruba borthakur | dhruba borthakur |
+| [HADOOP-2536](https://issues.apache.org/jira/browse/HADOOP-2536) | MapReduce for MySQL | Minor | . | Fredrik Hedberg | Fredrik Hedberg |
+| [HADOOP-1823](https://issues.apache.org/jira/browse/HADOOP-1823) | want InputFormat for bzip2 files | Major | . | Doug Cutting | |
+| [HADOOP-1480](https://issues.apache.org/jira/browse/HADOOP-1480) | pipes should be able to set user counters | Major | . | Owen O'Malley | Arun C Murthy |
+| [HADOOP-372](https://issues.apache.org/jira/browse/HADOOP-372) | should allow to specify different inputformat classes for different input dirs for Map/Reduce jobs | Major | . | Runping Qi | Chris Smith |
+| [HADOOP-153](https://issues.apache.org/jira/browse/HADOOP-153) | skip records that fail Task | Major | . | Doug Cutting | Sharad Agarwal |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4433](https://issues.apache.org/jira/browse/HADOOP-4433) | Improve data loader for collecting metrics and log files from hadoop and system | Major | . | Eric Yang | Eric Yang |
+| [HADOOP-4431](https://issues.apache.org/jira/browse/HADOOP-4431) | Add versionning/tags to Chukwa Chunk | Major | . | Jerome Boulon | Jerome Boulon |
+| [HADOOP-4424](https://issues.apache.org/jira/browse/HADOOP-4424) | menu layout change for Hadoop documentation | Blocker | documentation | Boris Shkolnik | Boris Shkolnik |
+| [HADOOP-4353](https://issues.apache.org/jira/browse/HADOOP-4353) | enable multi-line query from Hive CLI | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4345](https://issues.apache.org/jira/browse/HADOOP-4345) | Hive: Check that partitioning predicate is present when hive.partition.pruning = strict | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4307](https://issues.apache.org/jira/browse/HADOOP-4307) | add an option to describe table to show extended properties of the table such as serialization/deserialization properties | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4279](https://issues.apache.org/jira/browse/HADOOP-4279) | write the random number generator seed to log in the append-related tests | Blocker | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4252](https://issues.apache.org/jira/browse/HADOOP-4252) | Catch Ctrl-C in Hive CLI so that corresponding hadoop jobs can be killed | Minor | . | Prasad Chakka | Pete Wyckoff |
+| [HADOOP-4231](https://issues.apache.org/jira/browse/HADOOP-4231) | Hive: converting complex objects to JSON failed. | Minor | . | Zheng Shao | Zheng Shao |
+| [HADOOP-4230](https://issues.apache.org/jira/browse/HADOOP-4230) | Hive: GroupBy should not pass the whole row from mapper to reducer | Blocker | . | Zheng Shao | Ashish Thusoo |
+| [HADOOP-4205](https://issues.apache.org/jira/browse/HADOOP-4205) | [Hive] metastore and ql to use the refactored SerDe library | Major | . | Zheng Shao | Zheng Shao |
+| [HADOOP-4194](https://issues.apache.org/jira/browse/HADOOP-4194) | Add JobConf and JobID to job related methods in JobTrackerInstrumentation | Major | . | Mac Yang | Mac Yang |
+| [HADOOP-4181](https://issues.apache.org/jira/browse/HADOOP-4181) | some minor things to make Hadoop friendlier to git | Major | build | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4174](https://issues.apache.org/jira/browse/HADOOP-4174) | Move non-client methods ou of ClientProtocol | Major | . | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-4151](https://issues.apache.org/jira/browse/HADOOP-4151) | Add a memcmp-compatible interface for key types | Minor | . | Chris Douglas | Chris Douglas |
+| [HADOOP-4138](https://issues.apache.org/jira/browse/HADOOP-4138) | [Hive] refactor the SerDe library | Major | . | Zheng Shao | Zheng Shao |
+| [HADOOP-4124](https://issues.apache.org/jira/browse/HADOOP-4124) | Changing priority of a job should be available in CLI and available on the web UI only along with the Kill Job actions | Major | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4117](https://issues.apache.org/jira/browse/HADOOP-4117) | Improve configurability of Hadoop EC2 instances | Major | contrib/cloud | Tom White | Tom White |
+| [HADOOP-4113](https://issues.apache.org/jira/browse/HADOOP-4113) | libhdfs should never exit on its own but rather return errors to the calling application - missing diff files | Minor | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4094](https://issues.apache.org/jira/browse/HADOOP-4094) | [Hive]implement hive-site.xml similar to hadoop-site.xml | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4090](https://issues.apache.org/jira/browse/HADOOP-4090) | The configuration file lists two paths to hadoop directories (bin and conf). Startup should check that these are valid directories and give appropriate messages. | Minor | . | Ashish Thusoo | Raghotham Murthy |
+| [HADOOP-4083](https://issues.apache.org/jira/browse/HADOOP-4083) | change new config attribute queue.name to mapred.job.queue.name | Major | . | Owen O'Malley | Hemanth Yamijala |
+| [HADOOP-4075](https://issues.apache.org/jira/browse/HADOOP-4075) | test-patch.sh should output the ant commands that it runs | Major | build | Nigel Daley | Ramya Sunil |
+| [HADOOP-4062](https://issues.apache.org/jira/browse/HADOOP-4062) | IPC client does not need to be synchronized on the output stream when a connection is closed | Major | ipc | Hairong Kuang | Hairong Kuang |
+| [HADOOP-4053](https://issues.apache.org/jira/browse/HADOOP-4053) | Schedulers need to know when a job has completed | Blocker | . | Vivek Ratan | Amar Kamat |
+| [HADOOP-3975](https://issues.apache.org/jira/browse/HADOOP-3975) | test-patch can report the modifications found in the workspace along with the error message | Minor | test | Hemanth Yamijala | Ramya Sunil |
+| [HADOOP-3965](https://issues.apache.org/jira/browse/HADOOP-3965) | Make DataBlockScanner package private | Major | . | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-3948](https://issues.apache.org/jira/browse/HADOOP-3948) | Separate Namenodes edits and fsimage | Major | . | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3944](https://issues.apache.org/jira/browse/HADOOP-3944) | TupleWritable listed as public class but cannot be used without methods private to the package | Trivial | documentation | Michael Andrews | Chris Douglas |
+| [HADOOP-3943](https://issues.apache.org/jira/browse/HADOOP-3943) | NetworkTopology.pseudoSortByDistance does not need to be a synchronized method | Major | . | Hairong Kuang | Hairong Kuang |
+| [HADOOP-3935](https://issues.apache.org/jira/browse/HADOOP-3935) | Extract classes from DataNode.java | Trivial | . | Johan Oskarsson | Johan Oskarsson |
+| [HADOOP-3930](https://issues.apache.org/jira/browse/HADOOP-3930) | Decide how to integrate scheduler info into CLI and job tracker web page | Major | . | Matei Zaharia | Sreekanth Ramakrishnan |
+| [HADOOP-3908](https://issues.apache.org/jira/browse/HADOOP-3908) | Better error message if llibhdfs.so doesn't exist | Minor | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3905](https://issues.apache.org/jira/browse/HADOOP-3905) | Create a generic interface for edits log. | Major | . | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-3892](https://issues.apache.org/jira/browse/HADOOP-3892) | Include Unix group name in JobConf | Trivial | conf | Matei Zaharia | Matei Zaharia |
+| [HADOOP-3866](https://issues.apache.org/jira/browse/HADOOP-3866) | Improve Hadoop Jobtracker Admin | Major | scripts | craig weisenfluh | craig weisenfluh |
+| [HADOOP-3861](https://issues.apache.org/jira/browse/HADOOP-3861) | Make MapFile.Reader and Writer implement java.io.Closeable | Major | io | Tom White | Tom White |
+| [HADOOP-3860](https://issues.apache.org/jira/browse/HADOOP-3860) | Compare name-node performance when journaling is performed into local hard-drives or nfs. | Major | benchmarks | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-3853](https://issues.apache.org/jira/browse/HADOOP-3853) | Move multiple input format extension to library package | Major | . | Tom White | Tom White |
+| [HADOOP-3852](https://issues.apache.org/jira/browse/HADOOP-3852) | If ShellCommandExecutor had a toString() operator that listed the command run, its error messages may be more meaningful | Minor | util | Steve Loughran | Steve Loughran |
+| [HADOOP-3844](https://issues.apache.org/jira/browse/HADOOP-3844) | include message of local exception in Client call failures | Minor | ipc | Steve Loughran | Steve Loughran |
+| [HADOOP-3805](https://issues.apache.org/jira/browse/HADOOP-3805) | improve fuse-dfs write performance which is 33% slower than hadoop dfs -copyFromLocal | Minor | . | Pete Wyckoff | |
+| [HADOOP-3780](https://issues.apache.org/jira/browse/HADOOP-3780) | JobTracker should synchronously resolve the tasktracker's network location when the tracker registers | Major | . | Amar Kamat | Amar Kamat |
+| [HADOOP-3769](https://issues.apache.org/jira/browse/HADOOP-3769) | expose static SampleMapper and SampleReducer classes of GenericMRLoadGenerator class for gridmix reuse | Major | test | Lingyun Yang | Lingyun Yang |
+| [HADOOP-3759](https://issues.apache.org/jira/browse/HADOOP-3759) | Provide ability to run memory intensive jobs without affecting other running tasks on the nodes | Major | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-3747](https://issues.apache.org/jira/browse/HADOOP-3747) | Add counter support to MultipleOutputs | Minor | . | Alejandro Abdelnur | Alejandro Abdelnur |
+| [HADOOP-3721](https://issues.apache.org/jira/browse/HADOOP-3721) | CompositeRecordReader::next is unnecessarily complex | Major | . | Chris Douglas | Chris Douglas |
+| [HADOOP-3719](https://issues.apache.org/jira/browse/HADOOP-3719) | Chukwa | Major | . | Ari Rabkin | Ari Rabkin |
+| [HADOOP-3694](https://issues.apache.org/jira/browse/HADOOP-3694) | if MiniDFS startup time could be improved, testing time would be reduced | Major | test | Steve Loughran | Doug Cutting |
+| [HADOOP-3684](https://issues.apache.org/jira/browse/HADOOP-3684) | The data\_join should allow the user to implement a customer cloning function | Major | . | Runping Qi | Runping Qi |
+| [HADOOP-3664](https://issues.apache.org/jira/browse/HADOOP-3664) | Remove deprecated methods introduced in changes to validating input paths (HADOOP-3095) | Major | . | Tom White | Tom White |
+| [HADOOP-3661](https://issues.apache.org/jira/browse/HADOOP-3661) | Normalize fuse-dfs handling of moving things to trash wrt the way hadoop dfs does it (only when non posix trash flag is enabled in compile) | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3660](https://issues.apache.org/jira/browse/HADOOP-3660) | Add replication factor for injecting blocks in the data node cluster | Major | benchmarks | Sanjay Radia | Sanjay Radia |
+| [HADOOP-3655](https://issues.apache.org/jira/browse/HADOOP-3655) | provide more control options for the junit run | Minor | build | Steve Loughran | Steve Loughran |
+| [HADOOP-3646](https://issues.apache.org/jira/browse/HADOOP-3646) | Providing bzip2 as codec | Major | conf, io | Abdul Qadeer | Abdul Qadeer |
+| [HADOOP-3638](https://issues.apache.org/jira/browse/HADOOP-3638) | Cache the iFile index files in memory to reduce seeks during map output serving | Major | . | Devaraj Das | Jothi Padmanabhan |
+| [HADOOP-3624](https://issues.apache.org/jira/browse/HADOOP-3624) | CreateEditsLog could be improved to create tree directory structure | Minor | test | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3620](https://issues.apache.org/jira/browse/HADOOP-3620) | Namenode should synchronously resolve a datanode's network location when the datanode registers | Major | . | Hairong Kuang | Hairong Kuang |
+| [HADOOP-3617](https://issues.apache.org/jira/browse/HADOOP-3617) | Writes from map serialization include redundant checks for accounting space | Major | . | Chris Douglas | Chris Douglas |
+| [HADOOP-3605](https://issues.apache.org/jira/browse/HADOOP-3605) | Added an abort on unset AWS\_ACCOUNT\_ID to luanch-hadoop-master | Minor | contrib/cloud | Al Hoang | Al Hoang |
+| [HADOOP-3581](https://issues.apache.org/jira/browse/HADOOP-3581) | Prevent memory intensive user tasks from taking down nodes | Major | . | Hemanth Yamijala | Vinod Kumar Vavilapalli |
+| [HADOOP-3577](https://issues.apache.org/jira/browse/HADOOP-3577) | Tools to inject blocks into name node and simulated data nodes for testing | Minor | . | Sanjay Radia | Sanjay Radia |
+| [HADOOP-3563](https://issues.apache.org/jira/browse/HADOOP-3563) | Seperate out datanode and namenode functionality of generation stamp upgrade process | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-3556](https://issues.apache.org/jira/browse/HADOOP-3556) | Substitute the synchronized code in MD5Hash to avoid lock contention. Use ThreadLocal instead. | Major | io | Iván de Prado | Iván de Prado |
+| [HADOOP-3549](https://issues.apache.org/jira/browse/HADOOP-3549) | meaningful errno values in libhdfs | Major | . | Ben Slusky | Ben Slusky |
+| [HADOOP-3514](https://issues.apache.org/jira/browse/HADOOP-3514) | Reduce seeks during shuffle, by inline crcs | Major | . | Devaraj Das | Jothi Padmanabhan |
+| [HADOOP-3498](https://issues.apache.org/jira/browse/HADOOP-3498) | File globbing alternation should be able to span path components | Major | fs | Tom White | Tom White |
+| [HADOOP-3478](https://issues.apache.org/jira/browse/HADOOP-3478) | The algorithm to decide map re-execution on fetch failures can be improved | Major | . | Jothi Padmanabhan | Jothi Padmanabhan |
+| [HADOOP-3446](https://issues.apache.org/jira/browse/HADOOP-3446) | The reduce task should not flush the in memory file system before starting the reducer | Critical | . | Owen O'Malley | Chris Douglas |
+| [HADOOP-3412](https://issues.apache.org/jira/browse/HADOOP-3412) | Refactor the scheduler out of the JobTracker | Minor | . | Brice Arnould | Brice Arnould |
+| [HADOOP-3368](https://issues.apache.org/jira/browse/HADOOP-3368) | Can commons-logging.properties be pulled from hadoop-core? | Major | build | Steve Loughran | Steve Loughran |
+| [HADOOP-3342](https://issues.apache.org/jira/browse/HADOOP-3342) | Better safety of killing jobs via web interface | Minor | . | Daniel Naber | Enis Soztutar |
+| [HADOOP-3341](https://issues.apache.org/jira/browse/HADOOP-3341) | make key-value separators in hadoop streaming fully configurable | Major | . | Zheng Shao | Zheng Shao |
+| [HADOOP-3328](https://issues.apache.org/jira/browse/HADOOP-3328) | DFS write pipeline : only the last datanode needs to verify checksum | Major | . | Raghu Angadi | Raghu Angadi |
+| [HADOOP-3202](https://issues.apache.org/jira/browse/HADOOP-3202) | Deprecate org.apache.hadoop.fs.FileUtil.fullyDelete(FileSystem fs, Path dir) | Major | fs | Tsz Wo Nicholas Sze | Amareshwari Sriramadasu |
+| [HADOOP-3169](https://issues.apache.org/jira/browse/HADOOP-3169) | LeaseChecker daemon should not be started in DFSClient constructor | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-2411](https://issues.apache.org/jira/browse/HADOOP-2411) | Add support for larger EC2 instance types | Major | contrib/cloud | Tom White | Chris K Wensel |
+| [HADOOP-2330](https://issues.apache.org/jira/browse/HADOOP-2330) | Preallocate transaction log to improve namenode transaction logging performance | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-2302](https://issues.apache.org/jira/browse/HADOOP-2302) | Streaming should provide an option for numerical sort of keys | Major | . | Lohit Vijayarenu | Devaraj Das |
+| [HADOOP-2165](https://issues.apache.org/jira/browse/HADOOP-2165) | Augment JobHistory to store tasks' userlogs | Major | . | Arun C Murthy | Vinod Kumar Vavilapalli |
+| [HADOOP-2130](https://issues.apache.org/jira/browse/HADOOP-2130) | Pipes submit job should be Non-blocking | Critical | . | Srikanth Kakani | Arun C Murthy |
+| [HADOOP-1627](https://issues.apache.org/jira/browse/HADOOP-1627) | DFSAdmin incorrectly reports cluster data. | Minor | . | Konstantin Shvachko | Raghu Angadi |
+| [HADOOP-657](https://issues.apache.org/jira/browse/HADOOP-657) | Free temporary space should be modelled better | Major | . | Owen O'Malley | Ari Rabkin |
+| [HADOOP-249](https://issues.apache.org/jira/browse/HADOOP-249) | Improving Map -\> Reduce performance and Task JVM reuse | Major | . | Benjamin Reed | Devaraj Das |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4595](https://issues.apache.org/jira/browse/HADOOP-4595) | JVM Reuse triggers RuntimeException("Invalid state") | Major | . | Aaron Kimball | Devaraj Das |
+| [HADOOP-4552](https://issues.apache.org/jira/browse/HADOOP-4552) | Deadlock in RPC Server | Major | ipc | Raghu Angadi | Raghu Angadi |
+| [HADOOP-4525](https://issues.apache.org/jira/browse/HADOOP-4525) | config ipc.server.tcpnodelay is no loger being respected | Major | ipc | Clint Morgan | Clint Morgan |
+| [HADOOP-4510](https://issues.apache.org/jira/browse/HADOOP-4510) | FileOutputFormat protects getTaskOutputPath | Blocker | . | Chris K Wensel | Chris K Wensel |
+| [HADOOP-4500](https://issues.apache.org/jira/browse/HADOOP-4500) | multifilesplit is using job default filesystem incorrectly | Major | . | Joydeep Sen Sarma | Joydeep Sen Sarma |
+| [HADOOP-4498](https://issues.apache.org/jira/browse/HADOOP-4498) | JobHistory does not escape literal jobName when used in a regex pattern | Blocker | . | Chris K Wensel | Chris K Wensel |
+| [HADOOP-4471](https://issues.apache.org/jira/browse/HADOOP-4471) | Capacity Scheduler should maintain the right ordering of jobs in its running queue | Blocker | . | Vivek Ratan | Amar Kamat |
+| [HADOOP-4466](https://issues.apache.org/jira/browse/HADOOP-4466) | SequenceFileOutputFormat is coupled to WritableComparable and Writable | Blocker | io | Chris K Wensel | Chris K Wensel |
+| [HADOOP-4457](https://issues.apache.org/jira/browse/HADOOP-4457) | Input split logging in history is broken in 0.19 | Blocker | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4455](https://issues.apache.org/jira/browse/HADOOP-4455) | Upload the derby.jar and TestSeDe.jar needed for fixes to 0.19 bugs | Blocker | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4449](https://issues.apache.org/jira/browse/HADOOP-4449) | Minor formatting changes to quota related commands | Trivial | . | Raghu Angadi | Raghu Angadi |
+| [HADOOP-4446](https://issues.apache.org/jira/browse/HADOOP-4446) | Update Scheduling Information display in Web UI | Major | . | Karam Singh | Sreekanth Ramakrishnan |
+| [HADOOP-4439](https://issues.apache.org/jira/browse/HADOOP-4439) | Cleanup memory related resource management | Blocker | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4438](https://issues.apache.org/jira/browse/HADOOP-4438) | Add new/missing dfs commands in forrest | Blocker | documentation | Hemanth Yamijala | Suresh Srinivas |
+| [HADOOP-4427](https://issues.apache.org/jira/browse/HADOOP-4427) | Add new/missing commands in forrest | Blocker | documentation | Sharad Agarwal | Sreekanth Ramakrishnan |
+| [HADOOP-4425](https://issues.apache.org/jira/browse/HADOOP-4425) | Edits log takes much longer to load | Blocker | . | Chris Douglas | Chris Douglas |
+| [HADOOP-4423](https://issues.apache.org/jira/browse/HADOOP-4423) | FSDataset.getStoredBlock(id) should not return corrupted information | Blocker | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4418](https://issues.apache.org/jira/browse/HADOOP-4418) | Update documentation in forrest for Mapred, streaming and pipes | Blocker | documentation | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4410](https://issues.apache.org/jira/browse/HADOOP-4410) | TestMiniMRDebugScript fails on trunk | Blocker | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4405](https://issues.apache.org/jira/browse/HADOOP-4405) | all creation of hadoop dfs queries from with in hive shell | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4404](https://issues.apache.org/jira/browse/HADOOP-4404) | saveFSImage() should remove files from a storage directory that do not correspond to its type. | Blocker | . | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-4400](https://issues.apache.org/jira/browse/HADOOP-4400) | Add "hdfs://" to fs.default.name on quickstart.html | Trivial | documentation | Jeff Hammerbacher | Jeff Hammerbacher |
+| [HADOOP-4393](https://issues.apache.org/jira/browse/HADOOP-4393) | Merge AccessControlException and AccessControlIOException into one exception class | Blocker | fs | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4387](https://issues.apache.org/jira/browse/HADOOP-4387) | TestHDFSFileSystemContract fails on windows | Blocker | test | Raghu Angadi | Raghu Angadi |
+| [HADOOP-4380](https://issues.apache.org/jira/browse/HADOOP-4380) | Make new classes in mapred package private instead of public | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4378](https://issues.apache.org/jira/browse/HADOOP-4378) | TestJobQueueInformation fails regularly | Blocker | test | Tsz Wo Nicholas Sze | Sreekanth Ramakrishnan |
+| [HADOOP-4376](https://issues.apache.org/jira/browse/HADOOP-4376) | Fix line formatting in hadoop-default.xml for hadoop.http.filter.initializers | Blocker | conf | Enis Soztutar | Enis Soztutar |
+| [HADOOP-4373](https://issues.apache.org/jira/browse/HADOOP-4373) | Guaranteed Capacity calculation is not calculated correctly | Blocker | . | Karam Singh | Hemanth Yamijala |
+| [HADOOP-4367](https://issues.apache.org/jira/browse/HADOOP-4367) | Hive: UDAF functions cannot handle NULL values | Major | . | Zheng Shao | Zheng Shao |
+| [HADOOP-4366](https://issues.apache.org/jira/browse/HADOOP-4366) | Provide way to replace existing column names for columnSet tables | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4361](https://issues.apache.org/jira/browse/HADOOP-4361) | Corner cases in killJob from command line | Blocker | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4358](https://issues.apache.org/jira/browse/HADOOP-4358) | NPE from CreateEditsLog | Blocker | test | Chris Douglas | Raghu Angadi |
+| [HADOOP-4356](https://issues.apache.org/jira/browse/HADOOP-4356) | [Hive] for a 2-stage map-reduce job, number of reducers not set correctly | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4355](https://issues.apache.org/jira/browse/HADOOP-4355) | hive 2 case sensitivity issues | Major | . | Zheng Shao | |
+| [HADOOP-4344](https://issues.apache.org/jira/browse/HADOOP-4344) | Hive: Partition pruning causes semantic exception with joins | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4342](https://issues.apache.org/jira/browse/HADOOP-4342) | [hive] bug in partition pruning | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4336](https://issues.apache.org/jira/browse/HADOOP-4336) | fix sampling bug in fractional bucket case | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4335](https://issues.apache.org/jira/browse/HADOOP-4335) | FsShell -ls fails for file systems without owners or groups | Major | scripts | David Phillips | David Phillips |
+| [HADOOP-4333](https://issues.apache.org/jira/browse/HADOOP-4333) | add ability to drop partitions through DDL | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4330](https://issues.apache.org/jira/browse/HADOOP-4330) | Hive: AS clause with subqueries having group bys is not propogated to the outer query block | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4329](https://issues.apache.org/jira/browse/HADOOP-4329) | Hive: [] operator with maps does not work | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4327](https://issues.apache.org/jira/browse/HADOOP-4327) | Create table hive does not set delimeters | Major | . | Edward Capriolo | Namit Jain |
+| [HADOOP-4321](https://issues.apache.org/jira/browse/HADOOP-4321) | Document the capacity scheduler in Forrest | Blocker | documentation | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4320](https://issues.apache.org/jira/browse/HADOOP-4320) | [Hive] TCTLSeparatedProtocol implement maps/lists/sets read/writes | Major | . | Pete Wyckoff | |
+| [HADOOP-4319](https://issues.apache.org/jira/browse/HADOOP-4319) | fuse-dfs dfs\_read function may return less than the requested #of bytes even if EOF not reached | Blocker | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4316](https://issues.apache.org/jira/browse/HADOOP-4316) | [Hive] extra new lines at output | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4315](https://issues.apache.org/jira/browse/HADOOP-4315) | Hive: Cleanup temporary files once the job is done | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4309](https://issues.apache.org/jira/browse/HADOOP-4309) | eclipse-plugin no longer compiles on trunk | Blocker | contrib/eclipse-plugin | Chris Douglas | Chris Douglas |
+| [HADOOP-4303](https://issues.apache.org/jira/browse/HADOOP-4303) | Hive: trim and rtrim UDFs behaviors are reversed | Major | . | Ashish Thusoo | Ashish Thusoo |
+| [HADOOP-4302](https://issues.apache.org/jira/browse/HADOOP-4302) | TestReduceFetch fails intermittently | Blocker | . | Devaraj Das | Chris Douglas |
+| [HADOOP-4299](https://issues.apache.org/jira/browse/HADOOP-4299) | Unable to access a file by a different user in the same group when permissions is set to 770 or when permissions is turned OFF | Blocker | . | Ramya Sunil | Hairong Kuang |
+| [HADOOP-4296](https://issues.apache.org/jira/browse/HADOOP-4296) | Spasm of JobClient failures on successful jobs every once in a while | Blocker | . | Joydeep Sen Sarma | dhruba borthakur |
+| [HADOOP-4294](https://issues.apache.org/jira/browse/HADOOP-4294) | Hive: Parser should pass field schema to SerDe | Major | . | Zheng Shao | |
+| [HADOOP-4288](https://issues.apache.org/jira/browse/HADOOP-4288) | java.lang.NullPointerException is observed in Jobtracker log while call heartbeat | Blocker | . | Karam Singh | Amar Kamat |
+| [HADOOP-4287](https://issues.apache.org/jira/browse/HADOOP-4287) | [mapred] jobqueue\_details.jsp shows negative count of running and waiting reduces with CapacityTaskScheduler. | Blocker | . | Vinod Kumar Vavilapalli | Sreekanth Ramakrishnan |
+| [HADOOP-4282](https://issues.apache.org/jira/browse/HADOOP-4282) | User configurable filter fails to filter accesses to certain directories | Blocker | . | Kan Zhang | Tsz Wo Nicholas Sze |
+| [HADOOP-4280](https://issues.apache.org/jira/browse/HADOOP-4280) | test-libhdfs consistently fails on trunk | Blocker | . | Raghu Angadi | Pete Wyckoff |
+| [HADOOP-4278](https://issues.apache.org/jira/browse/HADOOP-4278) | TestDatanodeDeath failed occasionally | Blocker | . | Tsz Wo Nicholas Sze | dhruba borthakur |
+| [HADOOP-4275](https://issues.apache.org/jira/browse/HADOOP-4275) | New public methods added to the \*ID classes | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4274](https://issues.apache.org/jira/browse/HADOOP-4274) | Capacity scheduler's implementation of getJobs modifies the list of running jobs inadvertently | Blocker | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4273](https://issues.apache.org/jira/browse/HADOOP-4273) | [Hive] job submission exception if input is null | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4272](https://issues.apache.org/jira/browse/HADOOP-4272) | Hive: metadataTypedColumnsetSerDe should check if SERIALIZATION.LIB is old columnsetSerDe | Major | . | Zheng Shao | Prasad Chakka |
+| [HADOOP-4269](https://issues.apache.org/jira/browse/HADOOP-4269) | LineRecordReader.LineReader should use util.LineReader | Major | util | Chris Douglas | Chris Douglas |
+| [HADOOP-4267](https://issues.apache.org/jira/browse/HADOOP-4267) | TestDBJob failed on Linux | Blocker | . | Raghu Angadi | Enis Soztutar |
+| [HADOOP-4266](https://issues.apache.org/jira/browse/HADOOP-4266) | Hive: Support "IS NULL", "IS NOT NULL", and size(x) for map and list | Major | . | Zheng Shao | Zheng Shao |
+| [HADOOP-4265](https://issues.apache.org/jira/browse/HADOOP-4265) | [Hive] error when user specifies the delimiter | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4261](https://issues.apache.org/jira/browse/HADOOP-4261) | Jobs failing in the init stage will never cleanup | Blocker | . | Amar Kamat | Amareshwari Sriramadasu |
+| [HADOOP-4256](https://issues.apache.org/jira/browse/HADOOP-4256) | Remove Completed and Failed Job tables from jobqueue\_details.jsp | Blocker | . | Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
+| [HADOOP-4254](https://issues.apache.org/jira/browse/HADOOP-4254) | Cannot setSpaceQuota to 1TB | Blocker | . | Tsz Wo Nicholas Sze | Raghu Angadi |
+| [HADOOP-4250](https://issues.apache.org/jira/browse/HADOOP-4250) | Remove short names of serdes from Deserializer, Serializer & SerDe interface and relevant code. | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4249](https://issues.apache.org/jira/browse/HADOOP-4249) | Declare hsqldb.jar in eclipse plugin | Blocker | contrib/eclipse-plugin | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4248](https://issues.apache.org/jira/browse/HADOOP-4248) | Remove HADOOP-1230 API from 0.19 | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-4247](https://issues.apache.org/jira/browse/HADOOP-4247) | hadoop jar throwing exception when running examples | Blocker | . | Hemanth Yamijala | Owen O'Malley |
+| [HADOOP-4246](https://issues.apache.org/jira/browse/HADOOP-4246) | Reduce task copy errors may not kill it eventually | Blocker | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4242](https://issues.apache.org/jira/browse/HADOOP-4242) | Remove an extra ";" in FSDirectory | Blocker | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4241](https://issues.apache.org/jira/browse/HADOOP-4241) | -hiveconf config parameters in hive cli should override all config variables | Major | . | Joydeep Sen Sarma | Joydeep Sen Sarma |
+| [HADOOP-4236](https://issues.apache.org/jira/browse/HADOOP-4236) | JobTracker.killJob() fails to kill a job if the job is not yet initialized | Blocker | . | Amar Kamat | Sharad Agarwal |
+| [HADOOP-4232](https://issues.apache.org/jira/browse/HADOOP-4232) | Race condition in JVM reuse when more than one slot becomes free | Blocker | . | Devaraj Das | Devaraj Das |
+| [HADOOP-4225](https://issues.apache.org/jira/browse/HADOOP-4225) | FSEditLog logs modification time instead of access time. | Blocker | . | Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-4213](https://issues.apache.org/jira/browse/HADOOP-4213) | NPE in TestLimitTasksPerJobTaskScheduler | Major | test | Tsz Wo Nicholas Sze | Sreekanth Ramakrishnan |
+| [HADOOP-4209](https://issues.apache.org/jira/browse/HADOOP-4209) | The TaskAttemptID should not have the JobTracker start time | Blocker | . | Owen O'Malley | Amar Kamat |
+| [HADOOP-4200](https://issues.apache.org/jira/browse/HADOOP-4200) | Hadoop-Patch build is failing | Major | build | Ramya Sunil | Ramya Sunil |
+| [HADOOP-4197](https://issues.apache.org/jira/browse/HADOOP-4197) | Need to update DATA\_TRANSFER\_VERSION | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4195](https://issues.apache.org/jira/browse/HADOOP-4195) | SequenceFile.Writer close() uses compressor after returning it to CodecPool. | Major | io | Hong Tang | Arun C Murthy |
+| [HADOOP-4189](https://issues.apache.org/jira/browse/HADOOP-4189) | HADOOP-3245 is incomplete | Blocker | . | Amar Kamat | Amar Kamat |
+| [HADOOP-4183](https://issues.apache.org/jira/browse/HADOOP-4183) | select \* to console issues in Hive | Major | . | Joydeep Sen Sarma | |
+| [HADOOP-4175](https://issues.apache.org/jira/browse/HADOOP-4175) | Incorporate metastore server review comments | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4173](https://issues.apache.org/jira/browse/HADOOP-4173) | TestProcfsBasedProcessTree failing on Windows machine | Major | test, util | Ramya Sunil | Vinod Kumar Vavilapalli |
+| [HADOOP-4169](https://issues.apache.org/jira/browse/HADOOP-4169) | 'compressed' keyword in DDL syntax misleading and does not compress | Major | . | Joydeep Sen Sarma | Joydeep Sen Sarma |
+| [HADOOP-4163](https://issues.apache.org/jira/browse/HADOOP-4163) | If a reducer failed at shuffling stage, the task should fail, not just logging an exception | Blocker | . | Runping Qi | Sharad Agarwal |
+| [HADOOP-4155](https://issues.apache.org/jira/browse/HADOOP-4155) | JobHisotry::JOBTRACKER\_START\_TIME is not initialized properly | Major | . | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-4154](https://issues.apache.org/jira/browse/HADOOP-4154) | Fix javac warning in WritableUtils | Minor | io | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4149](https://issues.apache.org/jira/browse/HADOOP-4149) | JobQueueJobInProgressListener.jobUpdated() might not work as expected | Blocker | . | Amar Kamat | Amar Kamat |
+| [HADOOP-4147](https://issues.apache.org/jira/browse/HADOOP-4147) | Remove JobWithTaskContext from JobInProgress | Trivial | . | Amar Kamat | Amareshwari Sriramadasu |
+| [HADOOP-4146](https://issues.apache.org/jira/browse/HADOOP-4146) | [Hive] null pointer exception on a join | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4139](https://issues.apache.org/jira/browse/HADOOP-4139) | [Hive] multi group by statement is not optimized | Major | . | Namit Jain | Namit Jain |
+| [HADOOP-4135](https://issues.apache.org/jira/browse/HADOOP-4135) | change max length of database columns for metastore to 767 | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4133](https://issues.apache.org/jira/browse/HADOOP-4133) | remove derby.log files form repository and also change the location where these files get created | Minor | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4129](https://issues.apache.org/jira/browse/HADOOP-4129) | Memory limits of TaskTracker and Tasks should be in kiloBytes. | Blocker | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
+| [HADOOP-4125](https://issues.apache.org/jira/browse/HADOOP-4125) | Reduce cleanup tip web ui is does not show attempts | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4121](https://issues.apache.org/jira/browse/HADOOP-4121) | HistoryViewer initialization failure should log exception trace | Trivial | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-4112](https://issues.apache.org/jira/browse/HADOOP-4112) | Got ArrayOutOfBound exception while analyzing the job history | Major | . | Amar Kamat | Amareshwari Sriramadasu |
+| [HADOOP-4100](https://issues.apache.org/jira/browse/HADOOP-4100) | Scheduler.assignTasks should not be dealing with cleanupTask | Major | . | Devaraj Das | Amareshwari Sriramadasu |
+| [HADOOP-4099](https://issues.apache.org/jira/browse/HADOOP-4099) | HFTP interface compatibility with older releases broken | Blocker | fs | Kan Zhang | dhruba borthakur |
+| [HADOOP-4097](https://issues.apache.org/jira/browse/HADOOP-4097) | Hive interaction with speculative execution is broken | Critical | . | Joydeep Sen Sarma | Joydeep Sen Sarma |
+| [HADOOP-4093](https://issues.apache.org/jira/browse/HADOOP-4093) | [Hive]unify Table.getCols() & get\_fields() | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4089](https://issues.apache.org/jira/browse/HADOOP-4089) | Check if the tmp file used in the CLI exists before using it. | Major | . | Ashish Thusoo | |
+| [HADOOP-4087](https://issues.apache.org/jira/browse/HADOOP-4087) | Make Hive metastore server to work for PHP & Python clients | Major | . | Prasad Chakka | Prasad Chakka |
+| [HADOOP-4078](https://issues.apache.org/jira/browse/HADOOP-4078) | TestKosmosFileSystem fails on trunk | Blocker | fs | Amareshwari Sriramadasu | Lohit Vijayarenu |
+| [HADOOP-4077](https://issues.apache.org/jira/browse/HADOOP-4077) | Access permissions for setting access times and modification times for files | Blocker | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-4071](https://issues.apache.org/jira/browse/HADOOP-4071) | FSNameSystem.isReplicationInProgress should add an underReplicated block to the neededReplication queue using method "add" not "update" | Major | . | Hairong Kuang | Hairong Kuang |
+| [HADOOP-4054](https://issues.apache.org/jira/browse/HADOOP-4054) | During edit log loading, an underconstruction file's lease gets removed twice | Major | . | Hairong Kuang | Hairong Kuang |
+| [HADOOP-4050](https://issues.apache.org/jira/browse/HADOOP-4050) | TestFairScheduler failed on Linux | Major | . | Tsz Wo Nicholas Sze | Matei Zaharia |
+| [HADOOP-4036](https://issues.apache.org/jira/browse/HADOOP-4036) | Increment InterTrackerProtocol version number due to changes in HADOOP-3759 | Major | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4030](https://issues.apache.org/jira/browse/HADOOP-4030) | LzopCodec shouldn't be in the default list of codecs i.e. io.compression.codecs | Major | io | Arun C Murthy | Arun C Murthy |
+| [HADOOP-4027](https://issues.apache.org/jira/browse/HADOOP-4027) | When streaming utility is run without specifying mapper/reducer/input/output options, it returns 0. | Major | . | Ramya Sunil | |
+| [HADOOP-4023](https://issues.apache.org/jira/browse/HADOOP-4023) | javadoc warnings: incorrect references | Major | documentation | Tsz Wo Nicholas Sze | Owen O'Malley |
+| [HADOOP-4018](https://issues.apache.org/jira/browse/HADOOP-4018) | limit memory usage in jobtracker | Major | . | dhruba borthakur | dhruba borthakur |
+| [HADOOP-4014](https://issues.apache.org/jira/browse/HADOOP-4014) | DFS upgrade fails on Windows | Blocker | fs | NOMURA Yoshihide | Konstantin Shvachko |
+| [HADOOP-3991](https://issues.apache.org/jira/browse/HADOOP-3991) | updates to hadoop-ec2-env.sh for 0.18.0 | Minor | contrib/cloud | Karl Anderson | Tom White |
+| [HADOOP-3985](https://issues.apache.org/jira/browse/HADOOP-3985) | TestHDFSServerPorts fails on trunk | Major | . | Amar Kamat | Hairong Kuang |
+| [HADOOP-3970](https://issues.apache.org/jira/browse/HADOOP-3970) | Counters written to the job history cannot be recovered back | Major | . | Amar Kamat | Amar Kamat |
+| [HADOOP-3968](https://issues.apache.org/jira/browse/HADOOP-3968) | test-libhdfs fails on trunk | Major | . | Lohit Vijayarenu | Pete Wyckoff |
+| [HADOOP-3964](https://issues.apache.org/jira/browse/HADOOP-3964) | javadoc warnings by failmon | Major | build | Tsz Wo Nicholas Sze | dhruba borthakur |
+| [HADOOP-3962](https://issues.apache.org/jira/browse/HADOOP-3962) | Shell command "fs -count" should support paths with different file systsms | Major | fs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3961](https://issues.apache.org/jira/browse/HADOOP-3961) | resource estimation works badly in some cases | Blocker | . | Ari Rabkin | Ari Rabkin |
+| [HADOOP-3959](https://issues.apache.org/jira/browse/HADOOP-3959) | [HOD] --resource\_manager.options is not passed to qsub | Major | contrib/hod | Craig Macdonald | Vinod Kumar Vavilapalli |
+| [HADOOP-3958](https://issues.apache.org/jira/browse/HADOOP-3958) | TestMapRed ignores failures of the test case | Major | test | Owen O'Malley | Owen O'Malley |
+| [HADOOP-3957](https://issues.apache.org/jira/browse/HADOOP-3957) | Fix javac warnings in DistCp and the corresponding tests | Minor | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3954](https://issues.apache.org/jira/browse/HADOOP-3954) | Skip records enabled as default. | Critical | . | Koji Noguchi | Sharad Agarwal |
+| [HADOOP-3952](https://issues.apache.org/jira/browse/HADOOP-3952) | TestDataJoin references dfs.MiniDFSCluster instead of hdfs.MiniDFSCluster | Major | test | Owen O'Malley | Owen O'Malley |
+| [HADOOP-3951](https://issues.apache.org/jira/browse/HADOOP-3951) | The package name used in FSNamesystem is incorrect | Trivial | . | Tsz Wo Nicholas Sze | Chris Douglas |
+| [HADOOP-3950](https://issues.apache.org/jira/browse/HADOOP-3950) | TestMapRed and TestMiniMRDFSSort failed on trunk | Major | test | Tsz Wo Nicholas Sze | Enis Soztutar |
+| [HADOOP-3949](https://issues.apache.org/jira/browse/HADOOP-3949) | javadoc warnings: Multiple sources of package comments found for package | Major | build, documentation | Tsz Wo Nicholas Sze | Jerome Boulon |
+| [HADOOP-3946](https://issues.apache.org/jira/browse/HADOOP-3946) | TestMapRed fails on trunk | Blocker | test | Amareshwari Sriramadasu | Tom White |
+| [HADOOP-3937](https://issues.apache.org/jira/browse/HADOOP-3937) | Job history may get disabled due to overly long job names | Major | . | Matei Zaharia | Matei Zaharia |
+| [HADOOP-3933](https://issues.apache.org/jira/browse/HADOOP-3933) | DataNode's BlockSender sends more data than necessary | Minor | . | Ning Li | Ning Li |
+| [HADOOP-3919](https://issues.apache.org/jira/browse/HADOOP-3919) | hadoop conf got slightly mangled by 3772 | Minor | . | Ari Rabkin | Ari Rabkin |
+| [HADOOP-3910](https://issues.apache.org/jira/browse/HADOOP-3910) | Are ClusterTestDFSNamespaceLogging and ClusterTestDFS still valid tests? | Minor | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3907](https://issues.apache.org/jira/browse/HADOOP-3907) | INodeDirectoryWithQuota should be in its own .java file | Minor | . | Steve Loughran | Tsz Wo Nicholas Sze |
+| [HADOOP-3904](https://issues.apache.org/jira/browse/HADOOP-3904) | A few tests still using old hdfs package name | Minor | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3875](https://issues.apache.org/jira/browse/HADOOP-3875) | Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide next heartbeat time | Major | . | Arun C Murthy | Arun C Murthy |
+| [HADOOP-3864](https://issues.apache.org/jira/browse/HADOOP-3864) | JobTracker lockup due to JobInProgress.initTasks taking significant time for large jobs on large clusters | Critical | . | Arun C Murthy | Arun C Murthy |
+| [HADOOP-3863](https://issues.apache.org/jira/browse/HADOOP-3863) | Use a thread-local rather than static ENCODER/DECODER variables in Text for synchronization | Critical | . | Arun C Murthy | Arun C Murthy |
+| [HADOOP-3851](https://issues.apache.org/jira/browse/HADOOP-3851) | spelling error in FSNamesystemMetrics log message | Trivial | . | Steve Loughran | Steve Loughran |
+| [HADOOP-3848](https://issues.apache.org/jira/browse/HADOOP-3848) | TaskTracker.localizeJob calls getSystemDir for each task rather than caching it | Major | . | Arun C Murthy | Arun C Murthy |
+| [HADOOP-3846](https://issues.apache.org/jira/browse/HADOOP-3846) | CreateEditsLog used for benchmark misses creating parent directories | Minor | benchmarks | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3836](https://issues.apache.org/jira/browse/HADOOP-3836) | TestMultipleOutputs will fail if it is ran more than one times | Major | test | Tsz Wo Nicholas Sze | Alejandro Abdelnur |
+| [HADOOP-3831](https://issues.apache.org/jira/browse/HADOOP-3831) | slow-reading dfs clients do not recover from datanode-write-timeouts | Major | . | Christian Kunz | Raghu Angadi |
+| [HADOOP-3820](https://issues.apache.org/jira/browse/HADOOP-3820) | gridmix-env has a syntax error, and wrongly defines USE\_REAL\_DATASET by default | Major | benchmarks | Arun C Murthy | Arun C Murthy |
+| [HADOOP-3819](https://issues.apache.org/jira/browse/HADOOP-3819) | can not get svn revision # at build time if locale is not english | Minor | build | Rong-En Fan | Rong-En Fan |
+| [HADOOP-3816](https://issues.apache.org/jira/browse/HADOOP-3816) | KFS changes for faster directory listing | Minor | fs | Sriram Rao | Sriram Rao |
+| [HADOOP-3814](https://issues.apache.org/jira/browse/HADOOP-3814) | [HOD] Remove dfs.client.buffer.dir generation, as this is removed in Hadoop 0.19. | Blocker | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli |
+| [HADOOP-3795](https://issues.apache.org/jira/browse/HADOOP-3795) | NameNode does not save image if different dfs.name.dir have different checkpoint stamps | Major | . | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3785](https://issues.apache.org/jira/browse/HADOOP-3785) | FileSystem cache should be case-insensitive | Major | fs | Doug Cutting | Bill de hOra |
+| [HADOOP-3783](https://issues.apache.org/jira/browse/HADOOP-3783) | "deprecated filesystem name" warning on EC2 | Minor | contrib/cloud | Stuart Sierra | Tom White |
+| [HADOOP-3778](https://issues.apache.org/jira/browse/HADOOP-3778) | seek(long) in DFSInputStream should catch socket exception for retry later | Minor | . | Luo Ning | Luo Ning |
+| [HADOOP-3777](https://issues.apache.org/jira/browse/HADOOP-3777) | Failure to load native lzo libraries causes job failure | Major | . | Chris Douglas | Chris Douglas |
+| [HADOOP-3776](https://issues.apache.org/jira/browse/HADOOP-3776) | NPE in NameNode with unknown blocks | Blocker | . | Raghu Angadi | Raghu Angadi |
+| [HADOOP-3773](https://issues.apache.org/jira/browse/HADOOP-3773) | Setting the conf twice in Pipes Submitter | Trivial | . | Koji Noguchi | Koji Noguchi |
+| [HADOOP-3756](https://issues.apache.org/jira/browse/HADOOP-3756) | dfs.client.buffer.dir isn't used in hdfs, but it's still in conf/hadoop-default.xml | Trivial | . | Michael Bieniosek | Raghu Angadi |
+| [HADOOP-3732](https://issues.apache.org/jira/browse/HADOOP-3732) | Block scanner should read block information during initialization. | Blocker | . | Konstantin Shvachko | Raghu Angadi |
+| [HADOOP-3728](https://issues.apache.org/jira/browse/HADOOP-3728) | Cannot run more than one instance of examples.SleepJob at the same time. | Minor | . | Brice Arnould | Brice Arnould |
+| [HADOOP-3726](https://issues.apache.org/jira/browse/HADOOP-3726) | TestCLI loses exception details on setup/teardown | Minor | test | Steve Loughran | Steve Loughran |
+| [HADOOP-3725](https://issues.apache.org/jira/browse/HADOOP-3725) | TestMiniMRMapRedDebugScript loses exception details | Minor | test | Steve Loughran | Steve Loughran |
+| [HADOOP-3723](https://issues.apache.org/jira/browse/HADOOP-3723) | libhdfs only accepts O\_WRONLY and O\_RDONLY so does not accept things like O\_WRONLY \| O\_CREAT | Minor | . | Pete Wyckoff | Pi Song |
+| [HADOOP-3720](https://issues.apache.org/jira/browse/HADOOP-3720) | dfsadmin -refreshNodes should re-read the config file. | Major | . | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3711](https://issues.apache.org/jira/browse/HADOOP-3711) | Streaming input is not parsed properly to find the separator | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-3705](https://issues.apache.org/jira/browse/HADOOP-3705) | CompositeInputFormat is unable to parse InputFormat classes with names containing '\_' or '$' | Major | . | Jingkei Ly | Chris Douglas |
+| [HADOOP-3658](https://issues.apache.org/jira/browse/HADOOP-3658) | Incorrect destination IP logged for receiving blocks | Minor | . | Koji Noguchi | Chris Douglas |
+| [HADOOP-3643](https://issues.apache.org/jira/browse/HADOOP-3643) | jobtasks.jsp when called for running tasks should ignore completed TIPs | Major | . | Amar Kamat | Amar Kamat |
+| [HADOOP-3640](https://issues.apache.org/jira/browse/HADOOP-3640) | NativeS3FsInputStream read() method for reading a single byte is incorrect | Major | fs/s3 | Tom White | Tom White |
+| [HADOOP-3623](https://issues.apache.org/jira/browse/HADOOP-3623) | LeaseManager needs refactoring. | Major | . | Konstantin Shvachko | Tsz Wo Nicholas Sze |
+| [HADOOP-3592](https://issues.apache.org/jira/browse/HADOOP-3592) | org.apache.hadoop.fs.FileUtil.copy() will leak input streams if the destination can't be opened | Minor | fs | Steve Loughran | Bill de hOra |
+| [HADOOP-3570](https://issues.apache.org/jira/browse/HADOOP-3570) | Including user specified jar files in the client side classpath path in Hadoop 0.17 streaming | Major | . | Suhas Gogate | Sharad Agarwal |
+| [HADOOP-3560](https://issues.apache.org/jira/browse/HADOOP-3560) | Archvies sometimes create empty part files. | Blocker | . | Mahadev konar | Mahadev konar |
+| [HADOOP-3543](https://issues.apache.org/jira/browse/HADOOP-3543) | Need to increment the year field for the copyright notice | Trivial | documentation | Chris Douglas | Chris Douglas |
+| [HADOOP-3542](https://issues.apache.org/jira/browse/HADOOP-3542) | Hadoop archives should not create \_logs file in the final archive directory. | Blocker | . | Mahadev konar | Mahadev konar |
+| [HADOOP-3528](https://issues.apache.org/jira/browse/HADOOP-3528) | Metrics FilesCreated and files\_deleted metrics do not match. | Blocker | metrics | Lohit Vijayarenu | Lohit Vijayarenu |
+| [HADOOP-3506](https://issues.apache.org/jira/browse/HADOOP-3506) | Occasional NPE in Jets3tFileSystemStore | Major | fs/s3 | Robert | Tom White |
+| [HADOOP-3488](https://issues.apache.org/jira/browse/HADOOP-3488) | the rsync command in hadoop-daemon.sh also rsync the logs folder from the master, what deletes the datanode / tasktracker log files. | Critical | scripts | Stefan Groschupf | Craig Macdonald |
+| [HADOOP-3319](https://issues.apache.org/jira/browse/HADOOP-3319) | [HOD]checknodes prints errors messages on stdout | Major | contrib/hod | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
+| [HADOOP-3155](https://issues.apache.org/jira/browse/HADOOP-3155) | reducers stuck at shuffling | Blocker | . | Runping Qi | dhruba borthakur |
+| [HADOOP-3131](https://issues.apache.org/jira/browse/HADOOP-3131) | enabling BLOCK compression for map outputs breaks the reduce progress counters | Major | . | Colin Evans | Matei Zaharia |
+| [HADOOP-3076](https://issues.apache.org/jira/browse/HADOOP-3076) | [HOD] If a cluster directory is specified as a relative path, an existing script.exitcode file will not be deleted. | Blocker | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli |
+| [HADOOP-2403](https://issues.apache.org/jira/browse/HADOOP-2403) | JobHistory log files contain data that cannot be parsed by org.apache.hadoop.mapred.JobHistory | Critical | . | Runping Qi | Amareshwari Sriramadasu |
+| [HADOOP-2168](https://issues.apache.org/jira/browse/HADOOP-2168) | Pipes with a C++ record reader does not update progress in the map until it is 100% | Major | . | Owen O'Malley | Arun C Murthy |
+| [HADOOP-1945](https://issues.apache.org/jira/browse/HADOOP-1945) | pipes examples aren't in the release | Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-9](https://issues.apache.org/jira/browse/HADOOP-9) | mapred.local.dir temp dir. space allocation limited by smallest area | Minor | . | Paul Baclace | Ari Rabkin |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4464](https://issues.apache.org/jira/browse/HADOOP-4464) | Separate testClientTriggeredLeaseRecovery() out from TestFileCreation | Blocker | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4426](https://issues.apache.org/jira/browse/HADOOP-4426) | TestCapacityScheduler is broken | Blocker | . | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-4390](https://issues.apache.org/jira/browse/HADOOP-4390) | Hive: test for case sensitivity in serde2 thrift serde | Minor | . | Zheng Shao | |
+| [HADOOP-4259](https://issues.apache.org/jira/browse/HADOOP-4259) | findbugs should run over the tools.jar also | Minor | test | Owen O'Malley | Chris Douglas |
+| [HADOOP-4237](https://issues.apache.org/jira/browse/HADOOP-4237) | TestStreamingBadRecords.testNarrowDown fails intermittently | Minor | test | Sharad Agarwal | Sharad Agarwal |
+| [HADOOP-4069](https://issues.apache.org/jira/browse/HADOOP-4069) | TestKosmosFileSystem can fail when run through ant test on systems shared by users | Minor | fs | Hemanth Yamijala | Lohit Vijayarenu |
+| [HADOOP-4056](https://issues.apache.org/jira/browse/HADOOP-4056) | Unit test for DynamicSerDe | Minor | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3966](https://issues.apache.org/jira/browse/HADOOP-3966) | Place the new findbugs warnings introduced by the patch in the /tmp directory when "ant test-patch" is run. | Minor | test | Ramya Sunil | Ramya Sunil |
+| [HADOOP-3790](https://issues.apache.org/jira/browse/HADOOP-3790) | Add more unit tests to test appending to files in HDFS | Blocker | test | dhruba borthakur | Tsz Wo Nicholas Sze |
+| [HADOOP-3587](https://issues.apache.org/jira/browse/HADOOP-3587) | contrib/data\_join needs unit tests | Major | test | Chris Douglas | Chris Douglas |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-4354](https://issues.apache.org/jira/browse/HADOOP-4354) | Separate TestDatanodeDeath.testDatanodeDeath() into 4 tests | Blocker | test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4186](https://issues.apache.org/jira/browse/HADOOP-4186) | Move LineRecordReader.LineReader class to util package | Major | . | Tom White | Tom White |
+| [HADOOP-4184](https://issues.apache.org/jira/browse/HADOOP-4184) | Fix simple module dependencies between core, hdfs and mapred | Major | . | Tom White | Tom White |
+| [HADOOP-3824](https://issues.apache.org/jira/browse/HADOOP-3824) | Refactor org.apache.hadoop.mapred.StatusHttpServer | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-3601](https://issues.apache.org/jira/browse/HADOOP-3601) | Hive as a contrib project | Minor | . | Joydeep Sen Sarma | Ashish Thusoo |
+| [HADOOP-4105](https://issues.apache.org/jira/browse/HADOOP-4105) | libhdfs wiki is very out-of-date and contains mostly broken links | Minor | documentation | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-4076](https://issues.apache.org/jira/browse/HADOOP-4076) | fuse-dfs REAME lists wrong ant flags and is not specific in some place | Major | . | Pete Wyckoff | Pete Wyckoff |
+| [HADOOP-3942](https://issues.apache.org/jira/browse/HADOOP-3942) | Update DistCp documentation | Blocker | documentation | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-3791](https://issues.apache.org/jira/browse/HADOOP-3791) | Use generics in ReflectionUtils | Trivial | . | Chris Smith | Chris Smith |
+
+
http://git-wip-us.apache.org/repos/asf/hadoop/blob/140a33df/hadoop-common-project/hadoop-common/src/site/markdown/release/0.19.0/RELEASENOTES.0.19.0.md
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+
+<!---
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+-->
+# Apache Hadoop 0.19.0 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, features, and major improvements.
+
+
+---
+
+* [HADOOP-4466](https://issues.apache.org/jira/browse/HADOOP-4466) | *Blocker* | **SequenceFileOutputFormat is coupled to WritableComparable and Writable**
+
+Ensure that SequenceFileOutputFormat isn't tied to Writables and can be used with other Serialization frameworks.
+
+
+---
+
+* [HADOOP-4433](https://issues.apache.org/jira/browse/HADOOP-4433) | *Major* | **Improve data loader for collecting metrics and log files from hadoop and system**
+
+- Added startup and shutdown script
+- Added torque metrics data loader
+- Improve handling of Exec Plugin
+- Added Test cases for File Tailing Adaptors
+- Added Test cases for Start streaming at specific offset
+
+
+---
+
+* [HADOOP-4430](https://issues.apache.org/jira/browse/HADOOP-4430) | *Blocker* | **Namenode Web UI capacity report is inconsistent with Balancer**
+
+Changed reporting in the NameNode Web UI to more closely reflect the behavior of the re-balancer. Removed no longer used config parameter dfs.datanode.du.pct from hadoop-default.xml.
+
+
+---
+
+* [HADOOP-4293](https://issues.apache.org/jira/browse/HADOOP-4293) | *Major* | **Remove WritableJobConf**
+
+Made Configuration Writable and rename the old write method to writeXml.
+
+
+---
+
+* [HADOOP-4281](https://issues.apache.org/jira/browse/HADOOP-4281) | *Blocker* | **Capacity reported in some of the commands is not consistent with the Web UI reported data**
+
+Changed command "hadoop dfsadmin -report" to be consistent with Web UI for both Namenode and Datanode reports. "Total raw bytes" is changed to "Configured Capacity". "Present Capacity" is newly added to indicate the present capacity of the DFS. "Remaining raw bytes" is changed to "DFS Remaining". "Used raw bytes" is changed to "DFS Used". "% used" is changed to "DFS Used%". Applications that parse command output should be reviewed.
+
+
+---
+
+* [HADOOP-4227](https://issues.apache.org/jira/browse/HADOOP-4227) | *Minor* | **Remove the deprecated, unused class ShellCommand.**
+
+Removed the deprecated class org.apache.hadoop.fs.ShellCommand.
+
+
+---
+
+* [HADOOP-4205](https://issues.apache.org/jira/browse/HADOOP-4205) | *Major* | **[Hive] metastore and ql to use the refactored SerDe library**
+
+Improved Hive metastore and ql to use the refactored SerDe library.
+
+
+---
+
+* [HADOOP-4190](https://issues.apache.org/jira/browse/HADOOP-4190) | *Blocker* | **Changes to JobHistory makes it backward incompatible**
+
+Changed job history format to add a dot at end of each line.
+
+
+---
+
+* [HADOOP-4176](https://issues.apache.org/jira/browse/HADOOP-4176) | *Major* | **Implement getFileChecksum(Path) in HftpFileSystem**
+
+Implemented getFileChecksum(Path) in HftpFileSystemfor distcp support.
+
+
+---
+
+* [HADOOP-4138](https://issues.apache.org/jira/browse/HADOOP-4138) | *Major* | **[Hive] refactor the SerDe library**
+
+Introduced new SerDe library for src/contrib/hive.
+
+
+---
+
+* [HADOOP-4117](https://issues.apache.org/jira/browse/HADOOP-4117) | *Major* | **Improve configurability of Hadoop EC2 instances**
+
+Changed scripts to pass initialization script for EC2 instances at boot time (as EC2 user data) rather than embedding initialization information in the EC2 image. This change makes it easy to customize the hadoop-site.xml file for your cluster before launch, by editing the hadoop-ec2-init-remote.sh script, or by setting the environment variable USER\_DATA\_FILE in hadoop-ec2-env.sh to run a script of your choice.
+
+
+---
+
+* [HADOOP-4116](https://issues.apache.org/jira/browse/HADOOP-4116) | *Blocker* | **Balancer should provide better resource management**
+
+Changed DataNode protocol version without impact to clients other than to compel use of current version of client application.
+
+
+---
+
+* [HADOOP-4106](https://issues.apache.org/jira/browse/HADOOP-4106) | *Major* | **add time, permission and user attribute support to fuse-dfs**
+
+Added time, permission and user attribute support to libhdfs.
+
+
+---
+
+* [HADOOP-4086](https://issues.apache.org/jira/browse/HADOOP-4086) | *Major* | **Add limit to Hive QL**
+
+Added LIMIT to Hive query language.
+
+
+---
+
+* [HADOOP-4084](https://issues.apache.org/jira/browse/HADOOP-4084) | *Major* | **Add explain plan capabilities to Hive QL**
+
+Introduced "EXPLAIN" plan for Hive.
+
+
+---
+
+* [HADOOP-4018](https://issues.apache.org/jira/browse/HADOOP-4018) | *Major* | **limit memory usage in jobtracker**
+
+Introduced new configuration parameter mapred.max.tasks.per.job to specifie the maximum number of tasks per job.
+
+
+---
+
+* [HADOOP-3992](https://issues.apache.org/jira/browse/HADOOP-3992) | *Major* | **Synthetic Load Generator for NameNode testing**
+
+Added a synthetic load generation facility to the test directory.
+
+
+---
+
+* [HADOOP-3981](https://issues.apache.org/jira/browse/HADOOP-3981) | *Major* | **Need a distributed file checksum algorithm for HDFS**
+
+Implemented MD5-of-xxxMD5-of-yyyCRC32 which is a distributed file checksum algorithm for HDFS, where xxx is the number of CRCs per block and yyy is the number of bytes per CRC.
+
+Changed DistCp to use file checksum for comparing files if both source and destination FileSystem(s) support getFileChecksum(...).
+
+
+---
+
+* [HADOOP-3970](https://issues.apache.org/jira/browse/HADOOP-3970) | *Major* | **Counters written to the job history cannot be recovered back**
+
+Added getEscapedCompactString() and fromEscapedCompactString() to Counters.java to represent counters as Strings and to reconstruct the counters from the Strings.
+
+
+---
+
+* [HADOOP-3963](https://issues.apache.org/jira/browse/HADOOP-3963) | *Minor* | **libhdfs should never exit on its own but rather return errors to the calling application**
+
+Modified libhdfs to return NULL or error code when unrecoverable error occurs rather than exiting itself.
+
+
+---
+
+* [HADOOP-3941](https://issues.apache.org/jira/browse/HADOOP-3941) | *Major* | **Extend FileSystem API to return file-checksums/file-digests**
+
+Added new FileSystem APIs: FileChecksum and FileSystem.getFileChecksum(Path).
+
+
+---
+
+* [HADOOP-3939](https://issues.apache.org/jira/browse/HADOOP-3939) | *Major* | **DistCp should support an option for deleting non-existing files.**
+
+Added a new option -delete to DistCp so that if the files/directories exist in dst but not in src will be deleted. It uses FsShell to do delete, so that it will use trash if the trash is enable.
+
+
+---
+
+* [HADOOP-3938](https://issues.apache.org/jira/browse/HADOOP-3938) | *Major* | **Quotas for disk space management**
+
+Introducted byte space quotas for directories. The count shell command modified to report both name and byte quotas.
+
+
+---
+
+* [HADOOP-3930](https://issues.apache.org/jira/browse/HADOOP-3930) | *Major* | **Decide how to integrate scheduler info into CLI and job tracker web page**
+
+Changed TaskScheduler to expose API for Web UI and Command Line Tool.
+
+
+---
+
+* [HADOOP-3911](https://issues.apache.org/jira/browse/HADOOP-3911) | *Minor* | **' -blocks ' option not being recognized**
+
+Added a check to fsck options to make sure -files is not the first option so as to resolve conflicts with GenericOptionsParser.
+
+
+---
+
+* [HADOOP-3908](https://issues.apache.org/jira/browse/HADOOP-3908) | *Minor* | **Better error message if llibhdfs.so doesn't exist**
+
+Improved Fuse-dfs better error message if llibhdfs.so doesn't exist.
+
+
+---
+
+* [HADOOP-3889](https://issues.apache.org/jira/browse/HADOOP-3889) | *Minor* | **distcp: Better Error Message should be thrown when accessing source files/directory with no read permission**
+
+Changed DistCp error messages when there is a RemoteException. Changed the corresponding return value from -999 to -3.
+
+
+---
+
+* [HADOOP-3873](https://issues.apache.org/jira/browse/HADOOP-3873) | *Major* | **DistCp should have an option for limiting the number of files/bytes being copied**
+
+Added two new options -filelimit \<n\> and -sizelimit \<n\> to DistCp for limiting the total number of files and the total size in bytes, respectively.
+
+
+---
+
+* [HADOOP-3854](https://issues.apache.org/jira/browse/HADOOP-3854) | *Major* | **org.apache.hadoop.http.HttpServer should support user configurable filter**
+
+Added a configuration property hadoop.http.filter.initializers and a class org.apache.hadoop.http.FilterInitializer for supporting servlet filter. Cluster administrator could possibly configure customized filters for their web site.
+
+
+---
+
+* [HADOOP-3837](https://issues.apache.org/jira/browse/HADOOP-3837) | *Major* | **hadop streaming does not use progress reporting to detect hung tasks**
+
+Changed streaming tasks to adhere to task timeout value specified in the job configuration.
+
+
+---
+
+* [HADOOP-3829](https://issues.apache.org/jira/browse/HADOOP-3829) | *Major* | **Narrown down skipped records based on user acceptable value**
+
+Introduced new config parameter org.apache.hadoop.mapred.SkipBadRecords.setMapperMaxSkipRecords to set range of records to be skipped in the neighborhood of a failed record.
+
+
+---
+
+* [HADOOP-3828](https://issues.apache.org/jira/browse/HADOOP-3828) | *Major* | **Write skipped records' bytes to DFS**
+
+Skipped records can optionally be written to the HDFS. Refer org.apache.hadoop.mapred.SkipBadRecords.setSkipOutputPath for setting the output path.
+
+
+---
+
+* [HADOOP-3796](https://issues.apache.org/jira/browse/HADOOP-3796) | *Major* | **fuse-dfs should take rw,ro,trashon,trashoff,protected=blah mount arguments rather than them being compiled in**
+
+Changed Fuse configuration to use mount options.
+
+
+---
+
+* [HADOOP-3792](https://issues.apache.org/jira/browse/HADOOP-3792) | *Minor* | **exit code from "hadoop dfs -test ..." is wrong for Unix shell**
+
+Changed exit code from hadoop.fs.FsShell -test to match the usual Unix convention.
+
+
+---
+
+* [HADOOP-3746](https://issues.apache.org/jira/browse/HADOOP-3746) | *Minor* | **A fair sharing job scheduler**
+
+Introduced Fair Scheduler.
+
+
+---
+
+* [HADOOP-3730](https://issues.apache.org/jira/browse/HADOOP-3730) | *Major* | **add new JobConf constructor that disables loading default configurations**
+
+ Added a JobConf constructor that disables loading default configurations so as to take all default values from the JobTracker's configuration.
+
+
+---
+
+* [HADOOP-3722](https://issues.apache.org/jira/browse/HADOOP-3722) | *Minor* | **Provide a unified way to pass jobconf options from bin/hadoop**
+
+Changed streaming StreamJob and Submitter to implement Tool and Configurable, and to use GenericOptionsParser arguments -fs, -jt, -conf, -D, -libjars, -files, and -archives. Deprecated -jobconf, -cacheArchive, -dfs, -cacheArchive, -additionalconfspec, from streaming and pipes in favor of the generic options. Removed from streaming -config, -mapred.job.tracker, and -cluster.
+
+
+---
+
+* [HADOOP-3719](https://issues.apache.org/jira/browse/HADOOP-3719) | *Major* | **Chukwa**
+
+Introduced Chukwa data collection and analysis framework.
+
+
+---
+
+* [HADOOP-3714](https://issues.apache.org/jira/browse/HADOOP-3714) | *Trivial* | **Bash tab completion support**
+
+Adds a new contrib, bash-tab-completion, which enables bash tab completion for the bin/hadoop script. See the README file in the contrib directory for the installation.
+
+
+---
+
+* [HADOOP-3702](https://issues.apache.org/jira/browse/HADOOP-3702) | *Major* | **add support for chaining Maps in a single Map and after a Reduce [M\*/RM\*]**
+
+Introduced ChainMapper and the ChainReducer classes to allow composing chains of Maps and Reduces in a single Map/Reduce job, something like MAP+ REDUCE MAP*.
+
+
+---
+
+* [HADOOP-3695](https://issues.apache.org/jira/browse/HADOOP-3695) | *Major* | **[HOD] Have an ability to run multiple slaves per node**
+
+Added an ability in HOD to start multiple workers (TaskTrackers and/or DataNodes) per node to assist testing and simulation of scale. A configuration variable ringmaster.workers\_per\_ring was added to specify the number of workers to start.
+
+
+---
+
+* [HADOOP-3684](https://issues.apache.org/jira/browse/HADOOP-3684) | *Major* | **The data\_join should allow the user to implement a customer cloning function**
+
+Allowed user to overwrite clone function in a subclass of TaggedMapOutput class.
+
+
+---
+
+* [HADOOP-3667](https://issues.apache.org/jira/browse/HADOOP-3667) | *Major* | **Remove deprecated methods in JobConf**
+
+Removed the following deprecated methods from JobConf:
+ addInputPath(Path)
+ getInputPaths()
+ getMapOutputCompressionType()
+ getOutputPath()
+ getSystemDir()
+ setInputPath(Path)
+ setMapOutputCompressionType(CompressionType style)
+ setOutputPath(Path)
+
+
+---
+
+* [HADOOP-3652](https://issues.apache.org/jira/browse/HADOOP-3652) | *Major* | **Remove deprecated class OutputFormatBase**
+
+Removed deprecated org.apache.hadoop.mapred.OutputFormatBase.
+
+
+---
+
+* [HADOOP-3646](https://issues.apache.org/jira/browse/HADOOP-3646) | *Major* | **Providing bzip2 as codec**
+
+Introduced support for bzip2 compressed files.
+
+
+---
+
+* [HADOOP-3601](https://issues.apache.org/jira/browse/HADOOP-3601) | *Minor* | **Hive as a contrib project**
+
+Introduced Hive Data Warehouse built on top of Hadoop that enables structuring Hadoop files as tables and partitions and allows users to query this data through a SQL like language using a command line interface.
+
+
+---
+
+* [HADOOP-3595](https://issues.apache.org/jira/browse/HADOOP-3595) | *Major* | **Remove deprecated mapred.combine.once functionality**
+
+ Removed deprecated methods for mapred.combine.once functionality.
+
+
+---
+
+* [HADOOP-3585](https://issues.apache.org/jira/browse/HADOOP-3585) | *Minor* | **Hardware Failure Monitoring in large clusters running Hadoop/HDFS**
+
+Added FailMon as a contrib project for hardware failure monitoring and analysis, under /src/contrib/failmon. Created User Manual and Quick Start Guide.
+
+
+---
+
+* [HADOOP-3581](https://issues.apache.org/jira/browse/HADOOP-3581) | *Major* | **Prevent memory intensive user tasks from taking down nodes**
+
+Added the ability to kill process trees transgressing memory limits. TaskTracker uses the configuration parameters introduced in HADOOP-3759. In addition, mapred.tasktracker.taskmemorymanager.monitoring-interval specifies the interval for which TT waits between cycles of monitoring tasks' memory usage, and mapred.tasktracker.procfsbasedprocesstree.sleeptime-before-sigkill specifies the time TT waits for sending a SIGKILL to a process-tree that has overrun memory limits, after it has been sent a SIGTERM.
+
+
+---
+
+* [HADOOP-3549](https://issues.apache.org/jira/browse/HADOOP-3549) | *Major* | **meaningful errno values in libhdfs**
+
+Improved error reporting for libhdfs so permission problems now return EACCES.
+
+
+---
+
+* [HADOOP-3498](https://issues.apache.org/jira/browse/HADOOP-3498) | *Major* | **File globbing alternation should be able to span path components**
+
+Extended file globbing alternation to cross path components. For example, {/a/b,/c/d} expands to a path that matches the files /a/b and /c/d.
+
+
+---
+
+* [HADOOP-3485](https://issues.apache.org/jira/browse/HADOOP-3485) | *Minor* | **fix writes**
+
+Introduce write support for Fuse; requires Linux kernel 2.6.15 or better.
+
+
+---
+
+* [HADOOP-3478](https://issues.apache.org/jira/browse/HADOOP-3478) | *Major* | **The algorithm to decide map re-execution on fetch failures can be improved**
+
+Changed reducers to fetch maps in the same order for a given host to speed up identification of the faulty maps; reducers still randomize the host selection to distribute load.
+
+
+---
+
+* [HADOOP-3445](https://issues.apache.org/jira/browse/HADOOP-3445) | *Major* | **Implementing core scheduler functionality in Resource Manager (V1) for Hadoop**
+
+Introduced Capacity Task Scheduler.
+
+
+---
+
+* [HADOOP-3412](https://issues.apache.org/jira/browse/HADOOP-3412) | *Minor* | **Refactor the scheduler out of the JobTracker**
+
+Added the ability to chose between many schedulers, and to limit the number of running tasks per job.
+
+
+---
+
+* [HADOOP-3245](https://issues.apache.org/jira/browse/HADOOP-3245) | *Major* | **Provide ability to persist running jobs (extend HADOOP-1876)**
+
+Introduced recovery of jobs when JobTracker restarts. This facility is off by default. Introduced config parameters mapred.jobtracker.restart.recover, mapred.jobtracker.job.history.block.size, and mapred.jobtracker.job.history.buffer.size.
+
+
+---
+
+* [HADOOP-3150](https://issues.apache.org/jira/browse/HADOOP-3150) | *Major* | **Move task file promotion into the task**
+
+Moved task file promotion to the Task. When the task has finished, it will do a commit and is declared SUCCEDED. Job cleanup is done by a separate task. Job is declared SUCCEDED/FAILED after the cleanup task has finished. Added public classes org.apache.hadoop.mapred.JobContext, TaskAttemptContext, OutputCommitter and FileOutputCommiitter. Added public APIs: public OutputCommitter getOutputCommitter() and
+public void setOutputCommitter(Class\<? extends OutputCommitter\> theClass) in org.apache.hadoop.mapred.JobConf
+
+
+---
+
+* [HADOOP-3149](https://issues.apache.org/jira/browse/HADOOP-3149) | *Major* | **supporting multiple outputs for M/R jobs**
+
+Introduced MultipleOutputs class so Map/Reduce jobs can write data to different output files. Each output can use a different OutputFormat. Outpufiles are created within the job output directory. FileOutputFormat.getPathForCustomFile() creates a filename under the outputdir that is named with the task ID and task type (i.e. myfile-r-00001).
+
+
+---
+
+* [HADOOP-3062](https://issues.apache.org/jira/browse/HADOOP-3062) | *Major* | **Need to capture the metrics for the network ios generate by dfs reads/writes and map/reduce shuffling and break them down by racks**
+
+Introduced additional log records for data transfers.
+
+
+---
+
+* [HADOOP-3019](https://issues.apache.org/jira/browse/HADOOP-3019) | *Major* | **want input sampler & sorted partitioner**
+
+Added a partitioner that effects a total order of output data, and an input sampler for generating the partition keyset for TotalOrderPartitioner for when the map's input keytype and distribution approximates its output.
+
+
+---
+
+* [HADOOP-2816](https://issues.apache.org/jira/browse/HADOOP-2816) | *Major* | **Cluster summary at name node web has confusing report for space utilization**
+
+Improved space reporting for NameNode Web UI. Applications that parse the Web UI output should be reviewed.
+
+
+---
+
+* [HADOOP-2664](https://issues.apache.org/jira/browse/HADOOP-2664) | *Major* | **lzop-compatible CompresionCodec**
+
+Introduced LZOP codec.
+
+
+---
+
+* [HADOOP-2411](https://issues.apache.org/jira/browse/HADOOP-2411) | *Major* | **Add support for larger EC2 instance types**
+
+Added support for c1.* instance types and associated kernels for EC2.
+
+
+---
+
+* [HADOOP-2325](https://issues.apache.org/jira/browse/HADOOP-2325) | *Major* | **Require Java 6**
+
+Hadoop now requires Java 6.
+
+
+---
+
+* [HADOOP-2302](https://issues.apache.org/jira/browse/HADOOP-2302) | *Major* | ** Streaming should provide an option for numerical sort of keys**
+
+Introduced numerical key comparison for streaming.
+
+
+---
+
+* [HADOOP-1869](https://issues.apache.org/jira/browse/HADOOP-1869) | *Major* | **access times of HDFS files**
+
+Added HDFS file access times. By default, access times will be precise to the most recent hour boundary. A configuration parameter dfs.access.time.precision (milliseconds) is used to control this precision. Setting a value of 0 will disable persisting access times for HDFS files.
+
+
+---
+
+* [HADOOP-1823](https://issues.apache.org/jira/browse/HADOOP-1823) | *Major* | **want InputFormat for bzip2 files**
+
+bzip2 provided as codec in 0.19.0 https://issues.apache.org/jira/browse/HADOOP-3646
+
+
+---
+
+* [HADOOP-1700](https://issues.apache.org/jira/browse/HADOOP-1700) | *Major* | **Append to files in HDFS**
+
+Introduced append operation for HDFS files.
+
+
+---
+
+* [HADOOP-249](https://issues.apache.org/jira/browse/HADOOP-249) | *Major* | **Improving Map -\> Reduce performance and Task JVM reuse**
+
+Enabled task JVMs to be reused via the job config mapred.job.reuse.jvm.num.tasks.
+
+
+---
+
+* [HADOOP-153](https://issues.apache.org/jira/browse/HADOOP-153) | *Major* | **skip records that fail Task**
+
+Introduced record skipping where tasks fail on certain records. (org.apache.hadoop.mapred.SkipBadRecords)
+
+
+