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From a.@apache.org
Subject [09/51] [partial] hadoop git commit: HADOOP-14364. refresh changelog/release notes with newer Apache Yetus build
Date Fri, 01 Sep 2017 02:08:26 GMT
http://git-wip-us.apache.org/repos/asf/hadoop/blob/19041008/hadoop-common-project/hadoop-common/src/site/markdown/release/2.1.0-beta/RELEASENOTES.2.1.0-beta.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.1.0-beta/RELEASENOTES.2.1.0-beta.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.1.0-beta/RELEASENOTES.2.1.0-beta.md
index 639afd9..5a17ea6 100644
--- a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.1.0-beta/RELEASENOTES.2.1.0-beta.md
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.1.0-beta/RELEASENOTES.2.1.0-beta.md
@@ -23,735 +23,735 @@ These release notes cover new developer and user-facing incompatibilities, impor
 
 ---
 
-* [HADOOP-9832](https://issues.apache.org/jira/browse/HADOOP-9832) | *Blocker* | **Add RPC header to client ping**
+* [MAPREDUCE-3787](https://issues.apache.org/jira/browse/MAPREDUCE-3787) | *Major* | **[Gridmix] Improve STRESS mode**
 
-Client ping will be sent as a RPC header with a reserved callId instead of as a sentinel RPC packet length.
+JobMonitor can now deploy multiple threads for faster job-status polling. Use 'gridmix.job-monitor.thread-count' to set the number of threads. Stress mode now relies on the updates from the job monitor instead of polling for job status. Failures in job submission now get reported to the statistics module and ultimately reported to the user via summary.
 
 
 ---
 
-* [HADOOP-9820](https://issues.apache.org/jira/browse/HADOOP-9820) | *Blocker* | **RPCv9 wire protocol is insufficient to support multiplexing**
+* [MAPREDUCE-2722](https://issues.apache.org/jira/browse/MAPREDUCE-2722) | *Major* | **Gridmix simulated job's map's hdfsBytesRead counter is wrong when compressed input is used**
 
-**WARNING: No release note provided for this incompatible change.**
+Makes Gridmix use the uncompressed input data size while simulating map tasks in the case where compressed input data was used in original job.
 
 
 ---
 
-* [HADOOP-9698](https://issues.apache.org/jira/browse/HADOOP-9698) | *Blocker* | **RPCv9 client must honor server's SASL negotiate response**
+* [MAPREDUCE-3829](https://issues.apache.org/jira/browse/MAPREDUCE-3829) | *Major* | **[Gridmix] Gridmix should give better error message when input-data directory already exists and -generate option is given**
 
-The RPC client now waits for the Server's SASL negotiate response before instantiating its SASL client.
+Makes Gridmix emit out correct error message when the input data directory already exists and -generate option is used. Makes Gridmix exit with proper exit codes when Gridmix fails in args-processing, startup/setup.
 
 
 ---
 
-* [HADOOP-9683](https://issues.apache.org/jira/browse/HADOOP-9683) | *Blocker* | **Wrap IpcConnectionContext in RPC headers**
+* [MAPREDUCE-3953](https://issues.apache.org/jira/browse/MAPREDUCE-3953) | *Major* | **Gridmix throws NPE and does not simulate a job if the trace contains null taskStatus for a task**
 
-Connection context is now sent as a rpc header wrapped protobuf.
+Fixes NPE and makes Gridmix simulate succeeded-jobs-with-failed-tasks. All tasks of such simulated jobs(including the failed ones of original job) will succeed.
 
 
 ---
 
-* [HADOOP-9649](https://issues.apache.org/jira/browse/HADOOP-9649) | *Blocker* | **Promote YARN service life-cycle libraries into Hadoop Common**
+* [MAPREDUCE-3757](https://issues.apache.org/jira/browse/MAPREDUCE-3757) | *Major* | **Rumen Folder is not adjusting the shuffleFinished and sortFinished times of reduce task attempts**
 
-**WARNING: No release note provided for this incompatible change.**
+Fixed the sortFinishTime and shuffleFinishTime adjustments in Rumen Folder.
 
 
 ---
 
-* [HADOOP-9630](https://issues.apache.org/jira/browse/HADOOP-9630) | *Major* | **Remove IpcSerializationType**
+* [MAPREDUCE-4083](https://issues.apache.org/jira/browse/MAPREDUCE-4083) | *Major* | **GridMix emulated job tasks.resource-usage emulator for CPU usage throws NPE when Trace contains cumulativeCpuUsage value of 0 at attempt level**
 
-**WARNING: No release note provided for this incompatible change.**
+Fixes NPE in cpu emulation in Gridmix
 
 
 ---
 
-* [HADOOP-9425](https://issues.apache.org/jira/browse/HADOOP-9425) | *Major* | **Add error codes to rpc-response**
+* [MAPREDUCE-4149](https://issues.apache.org/jira/browse/MAPREDUCE-4149) | *Major* | **Rumen fails to parse certain counter strings**
 
-**WARNING: No release note provided for this incompatible change.**
+Fixes Rumen to parse counter strings containing the special characters "{" and "}".
 
 
 ---
 
-* [HADOOP-9421](https://issues.apache.org/jira/browse/HADOOP-9421) | *Blocker* | **Convert SASL to use ProtoBuf and provide negotiation capabilities**
+* [MAPREDUCE-4100](https://issues.apache.org/jira/browse/MAPREDUCE-4100) | *Minor* | **Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs**
 
-Raw SASL protocol now uses protobufs wrapped with RPC headers.
-The negotiation sequence incorporates the state of the exchange.
-The server now has the ability to advertise its supported auth types.
+Bug fixed in compression emulation feature for map only jobs.
 
 
 ---
 
-* [HADOOP-9380](https://issues.apache.org/jira/browse/HADOOP-9380) | *Major* | **Add totalLength to rpc response**
+* [MAPREDUCE-4356](https://issues.apache.org/jira/browse/MAPREDUCE-4356) | *Major* | **Provide access to ParsedTask.obtainTaskAttempts()**
 
-**WARNING: No release note provided for this incompatible change.**
+Made the method ParsedTask.obtainTaskAttempts() public.
 
 
 ---
 
-* [HADOOP-9228](https://issues.apache.org/jira/browse/HADOOP-9228) | *Minor* | **FileSystemContractTestBase never verifies that files are files**
+* [HADOOP-8886](https://issues.apache.org/jira/browse/HADOOP-8886) | *Major* | **Remove KFS support**
 
-fixed in HADOOP-9258
+Kosmos FS (KFS) is no longer maintained and Hadoop support has been removed. KFS has been replaced by QFS (HADOOP-8885).
 
 
 ---
 
-* [HADOOP-9227](https://issues.apache.org/jira/browse/HADOOP-9227) | *Trivial* | **FileSystemContractBaseTest doesn't test filesystem's mkdir/isDirectory() logic rigorously enough**
+* [HDFS-4053](https://issues.apache.org/jira/browse/HDFS-4053) | *Major* | **Increase the default block size**
 
-fixed in HADOOP-9258
+The default blocks size prior to this change was 64MB. This jira changes the default block size to 128MB. To go back to previous behavior, please configure the in hdfs-site.xml, the configuration parameter "dfs.blocksize" to 67108864.
 
 
 ---
 
-* [HADOOP-9194](https://issues.apache.org/jira/browse/HADOOP-9194) | *Major* | **RPC Support for QoS**
+* [HADOOP-9163](https://issues.apache.org/jira/browse/HADOOP-9163) | *Major* | **The rpc msg in  ProtobufRpcEngine.proto should be moved out to avoid an extra copy**
 
-Part of the RPC version 9 change. A service class byte is added after the version byte.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HADOOP-9163](https://issues.apache.org/jira/browse/HADOOP-9163) | *Major* | **The rpc msg in  ProtobufRpcEngine.proto should be moved out to avoid an extra copy**
+* [HDFS-4519](https://issues.apache.org/jira/browse/HDFS-4519) | *Major* | **Support override of jsvc binary and log file locations when launching secure datanode.**
+
+With this improvement the following options are available in release 1.2.0 and later on 1.x release stream:
+1. jsvc location can be overridden by setting environment variable JSVC\_HOME. Defaults to jsvc binary packaged within the Hadoop distro.
+2. jsvc log output is directed to the file defined by JSVC\_OUTFILE. Defaults to $HADOOP\_LOG\_DIR/jsvc.out.
+3. jsvc error output is directed to the file defined by JSVC\_ERRFILE file.  Defaults to $HADOOP\_LOG\_DIR/jsvc.err.
+
+With this improvement the following options are available in release 2.0.4 and later on 2.x release stream:
+1. jsvc log output is directed to the file defined by JSVC\_OUTFILE. Defaults to $HADOOP\_LOG\_DIR/jsvc.out.
+2. jsvc error output is directed to the file defined by JSVC\_ERRFILE file.  Defaults to $HADOOP\_LOG\_DIR/jsvc.err.
 
-**WARNING: No release note provided for this incompatible change.**
+For overriding jsvc location on 2.x releases, here is the release notes from HDFS-2303:
+To run secure Datanodes users must install jsvc for their platform and set JSVC\_HOME to point to the location of jsvc in their environment.
 
 
 ---
 
 * [HADOOP-9151](https://issues.apache.org/jira/browse/HADOOP-9151) | *Major* | **Include RPC error info in RpcResponseHeader instead of sending it separately**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HADOOP-8886](https://issues.apache.org/jira/browse/HADOOP-8886) | *Major* | **Remove KFS support**
+* [YARN-396](https://issues.apache.org/jira/browse/YARN-396) | *Major* | **Rationalize AllocateResponse in RM scheduler API**
 
-Kosmos FS (KFS) is no longer maintained and Hadoop support has been removed. KFS has been replaced by QFS (HADOOP-8885).
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HADOOP-8562](https://issues.apache.org/jira/browse/HADOOP-8562) | *Major* | **Enhancements to support Hadoop on Windows Server and Windows Azure environments**
+* [HADOOP-9380](https://issues.apache.org/jira/browse/HADOOP-9380) | *Major* | **Add totalLength to rpc response**
 
-This umbrella jira makes enhancements to support Hadoop natively on Windows Server and Windows Azure environments.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HADOOP-8470](https://issues.apache.org/jira/browse/HADOOP-8470) | *Major* | **Implementation of 4-layer subclass of NetworkTopology (NetworkTopologyWithNodeGroup)**
+* [HADOOP-9228](https://issues.apache.org/jira/browse/HADOOP-9228) | *Minor* | **FileSystemContractTestBase never verifies that files are files**
 
-This patch should be checked in together (or after) with JIRA Hadoop-8469: https://issues.apache.org/jira/browse/HADOOP-8469
+fixed in HADOOP-9258
 
 
 ---
 
-* [HDFS-5083](https://issues.apache.org/jira/browse/HDFS-5083) | *Blocker* | **Update the HDFS compatibility version range**
+* [HADOOP-9227](https://issues.apache.org/jira/browse/HADOOP-9227) | *Trivial* | **FileSystemContractBaseTest doesn't test filesystem's mkdir/isDirectory() logic rigorously enough**
 
-**WARNING: No release note provided for this incompatible change.**
+fixed in HADOOP-9258
 
 
 ---
 
-* [HDFS-4996](https://issues.apache.org/jira/browse/HDFS-4996) | *Minor* | **ClientProtocol#metaSave can be made idempotent by overwriting the output file instead of appending to it**
+* [YARN-439](https://issues.apache.org/jira/browse/YARN-439) | *Major* | **Flatten NodeHeartbeatResponse**
 
-The dfsadmin -metasave command has been changed to overwrite the output file.  Previously, this command would append to the output file if it already existed.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HDFS-4866](https://issues.apache.org/jira/browse/HDFS-4866) | *Blocker* | **Protocol buffer support cannot compile under C**
+* [YARN-440](https://issues.apache.org/jira/browse/YARN-440) | *Major* | **Flatten RegisterNodeManagerResponse**
 
-The Protocol Buffers definition of the inter-namenode protocol required a change for compatibility with compiled C clients.  This is a backwards-incompatible change.  A namenode prior to this change will not be able to communicate with a namenode after this change.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HDFS-4832](https://issues.apache.org/jira/browse/HDFS-4832) | *Critical* | **Namenode doesn't change the number of missing blocks in safemode when DNs rejoin or leave**
+* [HADOOP-9194](https://issues.apache.org/jira/browse/HADOOP-9194) | *Major* | **RPC Support for QoS**
 
-This change makes name node keep its internal replication queues and data node state updated in manual safe mode. This allows metrics and UI to present up-to-date information while in safe mode. The behavior during start-up safe mode is unchanged.
+Part of the RPC version 9 change. A service class byte is added after the version byte.
 
 
 ---
 
-* [HDFS-4659](https://issues.apache.org/jira/browse/HDFS-4659) | *Major* | **Support setting execution bit for regular files**
+* [YARN-536](https://issues.apache.org/jira/browse/YARN-536) | *Major* | **Remove ContainerStatus, ContainerState from Container api interface as they will not be called by the container object**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HDFS-4519](https://issues.apache.org/jira/browse/HDFS-4519) | *Major* | **Support override of jsvc binary and log file locations when launching secure datanode.**
-
-With this improvement the following options are available in release 1.2.0 and later on 1.x release stream:
-1. jsvc location can be overridden by setting environment variable JSVC\_HOME. Defaults to jsvc binary packaged within the Hadoop distro.
-2. jsvc log output is directed to the file defined by JSVC\_OUTFILE. Defaults to $HADOOP\_LOG\_DIR/jsvc.out.
-3. jsvc error output is directed to the file defined by JSVC\_ERRFILE file.  Defaults to $HADOOP\_LOG\_DIR/jsvc.err.
-
-With this improvement the following options are available in release 2.0.4 and later on 2.x release stream:
-1. jsvc log output is directed to the file defined by JSVC\_OUTFILE. Defaults to $HADOOP\_LOG\_DIR/jsvc.out.
-2. jsvc error output is directed to the file defined by JSVC\_ERRFILE file.  Defaults to $HADOOP\_LOG\_DIR/jsvc.err.
+* [HDFS-1804](https://issues.apache.org/jira/browse/HDFS-1804) | *Minor* | **Add a new block-volume device choosing policy that looks at free space**
 
-For overriding jsvc location on 2.x releases, here is the release notes from HDFS-2303:
-To run secure Datanodes users must install jsvc for their platform and set JSVC\_HOME to point to the location of jsvc in their environment.
+There is now a new option to have the DN take into account available disk space on each volume when choosing where to place a replica when performing an HDFS write. This can be enabled by setting the config "dfs.datanode.fsdataset.volume.choosing.policy" to the value "org.apache.hadoop.hdfs.server.datanode.fsdataset.AvailableSpaceVolumeChoosingPolicy".
 
 
 ---
 
-* [HDFS-4434](https://issues.apache.org/jira/browse/HDFS-4434) | *Major* | **Provide a mapping from INodeId to INode**
+* [YARN-561](https://issues.apache.org/jira/browse/YARN-561) | *Major* | **Nodemanager should set some key information into the environment of every container that it launches.**
 
-This change adds support for referencing files and directories based on fileID/inodeID using a path /.reserved/.inodes/\<inodeid\>. With this change creating a file or directory /.reserved is not longer allowed. Before upgrading to a release with this change, files /.reserved needs to be renamed to another name.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HDFS-4305](https://issues.apache.org/jira/browse/HDFS-4305) | *Minor* | **Add a configurable limit on number of blocks per file, and min block size**
+* [MAPREDUCE-4737](https://issues.apache.org/jira/browse/MAPREDUCE-4737) | *Major* | ** Hadoop does not close output file / does not call Mapper.cleanup if exception in map**
 
-This change introduces a maximum number of blocks per file, by default one million, and a minimum block size, by default 1MB. These can optionally be changed via the configuration settings "dfs.namenode.fs-limits.max-blocks-per-file" and "dfs.namenode.fs-limits.min-block-size", respectively.
+Ensure that mapreduce APIs are semantically consistent with mapred API w.r.t Mapper.cleanup and Reducer.cleanup; in the sense that cleanup is now called even if there is an error. The old mapred API already ensures that Mapper.close and Reducer.close are invoked during error handling. Note that it is an incompatible change, however end-users can override Mapper.run and Reducer.run to get the old (inconsistent) behaviour.
 
 
 ---
 
-* [HDFS-4053](https://issues.apache.org/jira/browse/HDFS-4053) | *Major* | **Increase the default block size**
+* [HDFS-4305](https://issues.apache.org/jira/browse/HDFS-4305) | *Minor* | **Add a configurable limit on number of blocks per file, and min block size**
 
-The default blocks size prior to this change was 64MB. This jira changes the default block size to 128MB. To go back to previous behavior, please configure the in hdfs-site.xml, the configuration parameter "dfs.blocksize" to 67108864.
+This change introduces a maximum number of blocks per file, by default one million, and a minimum block size, by default 1MB. These can optionally be changed via the configuration settings "dfs.namenode.fs-limits.max-blocks-per-file" and "dfs.namenode.fs-limits.min-block-size", respectively.
 
 
 ---
 
-* [HDFS-2802](https://issues.apache.org/jira/browse/HDFS-2802) | *Major* | **Support for RW/RO snapshots in HDFS**
+* [YARN-579](https://issues.apache.org/jira/browse/YARN-579) | *Major* | **Make ApplicationToken part of Container's token list to help RM-restart**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [HDFS-1804](https://issues.apache.org/jira/browse/HDFS-1804) | *Minor* | **Add a new block-volume device choosing policy that looks at free space**
+* [HDFS-4659](https://issues.apache.org/jira/browse/HDFS-4659) | *Major* | **Support setting execution bit for regular files**
 
-There is now a new option to have the DN take into account available disk space on each volume when choosing where to place a replica when performing an HDFS write. This can be enabled by setting the config "dfs.datanode.fsdataset.volume.choosing.policy" to the value "org.apache.hadoop.hdfs.server.datanode.fsdataset.AvailableSpaceVolumeChoosingPolicy".
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5399](https://issues.apache.org/jira/browse/MAPREDUCE-5399) | *Blocker* | **Unnecessary Configuration instantiation in IFileInputStream slows down merge**
+* [HDFS-4434](https://issues.apache.org/jira/browse/HDFS-4434) | *Major* | **Provide a mapping from INodeId to INode**
 
-Fixes blank Configuration object creation overhead by reusing the Job configuration in InMemoryReader.
+This change adds support for referencing files and directories based on fileID/inodeID using a path /.reserved/.inodes/\<inodeid\>. With this change creating a file or directory /.reserved is not longer allowed. Before upgrading to a release with this change, files /.reserved needs to be renamed to another name.
 
 
 ---
 
-* [MAPREDUCE-5304](https://issues.apache.org/jira/browse/MAPREDUCE-5304) | *Blocker* | **mapreduce.Job killTask/failTask/getTaskCompletionEvents methods have incompatible signature changes**
+* [HADOOP-9425](https://issues.apache.org/jira/browse/HADOOP-9425) | *Major* | **Add error codes to rpc-response**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5300](https://issues.apache.org/jira/browse/MAPREDUCE-5300) | *Major* | **Two function signature changes in filecache.DistributedCache**
+* [YARN-629](https://issues.apache.org/jira/browse/YARN-629) | *Major* | **Make YarnRemoteException not be rooted at IOException**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5237](https://issues.apache.org/jira/browse/MAPREDUCE-5237) | *Major* | **ClusterStatus incompatiblity issues with MR1**
+* [YARN-633](https://issues.apache.org/jira/browse/YARN-633) | *Major* | **Change RMAdminProtocol api to throw IOException and YarnRemoteException**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5234](https://issues.apache.org/jira/browse/MAPREDUCE-5234) | *Major* | **Signature changes for getTaskId of TaskReport in mapred**
+* [YARN-632](https://issues.apache.org/jira/browse/YARN-632) | *Major* | **Change ContainerManager api to throw IOException and YarnRemoteException**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5233](https://issues.apache.org/jira/browse/MAPREDUCE-5233) | *Major* | **Functions are changed or removed from Job in jobcontrol**
+* [YARN-631](https://issues.apache.org/jira/browse/YARN-631) | *Major* | **Change ClientRMProtocol api to throw IOException and YarnRemoteException**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5184](https://issues.apache.org/jira/browse/MAPREDUCE-5184) | *Major* | **Document MR Binary Compatibility vis-a-vis hadoop-1 and hadoop-2**
+* [YARN-630](https://issues.apache.org/jira/browse/YARN-630) | *Major* | **Change AMRMProtocol api to throw IOException and YarnRemoteException**
 
-Document MR Binary Compatibility vis-a-vis hadoop-1 and hadoop-2 for end-users.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5176](https://issues.apache.org/jira/browse/MAPREDUCE-5176) | *Major* | **Preemptable annotations (to support preemption in MR)**
+* [MAPREDUCE-4067](https://issues.apache.org/jira/browse/MAPREDUCE-4067) | *Critical* | **Replace YarnRemoteException with IOException in MRv2 APIs**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-5156](https://issues.apache.org/jira/browse/MAPREDUCE-5156) | *Blocker* | **Hadoop-examples-1.x.x.jar cannot run on Yarn**
+* [YARN-615](https://issues.apache.org/jira/browse/YARN-615) | *Major* | **ContainerLaunchContext.containerTokens should simply be called tokens**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4942](https://issues.apache.org/jira/browse/MAPREDUCE-4942) | *Major* | **mapreduce.Job has a bunch of methods that throw InterruptedException so its incompatible with MR1**
+* [MAPREDUCE-5234](https://issues.apache.org/jira/browse/MAPREDUCE-5234) | *Major* | **Signature changes for getTaskId of TaskReport in mapred**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4737](https://issues.apache.org/jira/browse/MAPREDUCE-4737) | *Major* | ** Hadoop does not close output file / does not call Mapper.cleanup if exception in map**
+* [MAPREDUCE-5156](https://issues.apache.org/jira/browse/MAPREDUCE-5156) | *Blocker* | **Hadoop-examples-1.x.x.jar cannot run on Yarn**
 
-Ensure that mapreduce APIs are semantically consistent with mapred API w.r.t Mapper.cleanup and Reducer.cleanup; in the sense that cleanup is now called even if there is an error. The old mapred API already ensures that Mapper.close and Reducer.close are invoked during error handling. Note that it is an incompatible change, however end-users can override Mapper.run and Reducer.run to get the old (inconsistent) behaviour.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4356](https://issues.apache.org/jira/browse/MAPREDUCE-4356) | *Major* | **Provide access to ParsedTask.obtainTaskAttempts()**
+* [MAPREDUCE-5233](https://issues.apache.org/jira/browse/MAPREDUCE-5233) | *Major* | **Functions are changed or removed from Job in jobcontrol**
 
-Made the method ParsedTask.obtainTaskAttempts() public.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4149](https://issues.apache.org/jira/browse/MAPREDUCE-4149) | *Major* | **Rumen fails to parse certain counter strings**
+* [HADOOP-8562](https://issues.apache.org/jira/browse/HADOOP-8562) | *Major* | **Enhancements to support Hadoop on Windows Server and Windows Azure environments**
 
-Fixes Rumen to parse counter strings containing the special characters "{" and "}".
+This umbrella jira makes enhancements to support Hadoop natively on Windows Server and Windows Azure environments.
 
 
 ---
 
-* [MAPREDUCE-4100](https://issues.apache.org/jira/browse/MAPREDUCE-4100) | *Minor* | **Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs**
+* [YARN-571](https://issues.apache.org/jira/browse/YARN-571) | *Major* | **User should not be part of ContainerLaunchContext**
 
-Bug fixed in compression emulation feature for map only jobs.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4083](https://issues.apache.org/jira/browse/MAPREDUCE-4083) | *Major* | **GridMix emulated job tasks.resource-usage emulator for CPU usage throws NPE when Trace contains cumulativeCpuUsage value of 0 at attempt level**
+* [MAPREDUCE-5237](https://issues.apache.org/jira/browse/MAPREDUCE-5237) | *Major* | **ClusterStatus incompatiblity issues with MR1**
 
-Fixes NPE in cpu emulation in Gridmix
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-4067](https://issues.apache.org/jira/browse/MAPREDUCE-4067) | *Critical* | **Replace YarnRemoteException with IOException in MRv2 APIs**
+* [YARN-716](https://issues.apache.org/jira/browse/YARN-716) | *Major* | **Make ApplicationID immutable**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-3953](https://issues.apache.org/jira/browse/MAPREDUCE-3953) | *Major* | **Gridmix throws NPE and does not simulate a job if the trace contains null taskStatus for a task**
+* [YARN-684](https://issues.apache.org/jira/browse/YARN-684) | *Major* | **ContainerManager.startContainer needs to only have ContainerTokenIdentifier instead of the whole Container**
 
-Fixes NPE and makes Gridmix simulate succeeded-jobs-with-failed-tasks. All tasks of such simulated jobs(including the failed ones of original job) will succeed.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-3829](https://issues.apache.org/jira/browse/MAPREDUCE-3829) | *Major* | **[Gridmix] Gridmix should give better error message when input-data directory already exists and -generate option is given**
+* [MAPREDUCE-5176](https://issues.apache.org/jira/browse/MAPREDUCE-5176) | *Major* | **Preemptable annotations (to support preemption in MR)**
 
-Makes Gridmix emit out correct error message when the input data directory already exists and -generate option is used. Makes Gridmix exit with proper exit codes when Gridmix fails in args-processing, startup/setup.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-3787](https://issues.apache.org/jira/browse/MAPREDUCE-3787) | *Major* | **[Gridmix] Improve STRESS mode**
+* [YARN-735](https://issues.apache.org/jira/browse/YARN-735) | *Major* | **Make ApplicationAttemptID, ContainerID, NodeID immutable**
 
-JobMonitor can now deploy multiple threads for faster job-status polling. Use 'gridmix.job-monitor.thread-count' to set the number of threads. Stress mode now relies on the updates from the job monitor instead of polling for job status. Failures in job submission now get reported to the statistics module and ultimately reported to the user via summary.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-3757](https://issues.apache.org/jira/browse/MAPREDUCE-3757) | *Major* | **Rumen Folder is not adjusting the shuffleFinished and sortFinished times of reduce task attempts**
+* [YARN-749](https://issues.apache.org/jira/browse/YARN-749) | *Major* | **Rename ResourceRequest (get,set)HostName to (get,set)ResourceName**
 
-Fixed the sortFinishTime and shuffleFinishTime adjustments in Rumen Folder.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [MAPREDUCE-2722](https://issues.apache.org/jira/browse/MAPREDUCE-2722) | *Major* | **Gridmix simulated job's map's hdfsBytesRead counter is wrong when compressed input is used**
+* [YARN-720](https://issues.apache.org/jira/browse/YARN-720) | *Major* | **container-log4j.properties should not refer to mapreduce properties**
 
-Makes Gridmix use the uncompressed input data size while simulating map tasks in the case where compressed input data was used in original job.
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-1056](https://issues.apache.org/jira/browse/YARN-1056) | *Trivial* | **Fix configs yarn.resourcemanager.resourcemanager.connect.{max.wait.secs\|retry\_interval.secs}**
+* [HADOOP-8470](https://issues.apache.org/jira/browse/HADOOP-8470) | *Major* | **Implementation of 4-layer subclass of NetworkTopology (NetworkTopologyWithNodeGroup)**
 
-**WARNING: No release note provided for this incompatible change.**
+This patch should be checked in together (or after) with JIRA Hadoop-8469: https://issues.apache.org/jira/browse/HADOOP-8469
 
 
 ---
 
-* [YARN-926](https://issues.apache.org/jira/browse/YARN-926) | *Blocker* | **ContainerManagerProtcol APIs should take in requests for multiple containers**
+* [MAPREDUCE-5300](https://issues.apache.org/jira/browse/MAPREDUCE-5300) | *Major* | **Two function signature changes in filecache.DistributedCache**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-918](https://issues.apache.org/jira/browse/YARN-918) | *Blocker* | **ApplicationMasterProtocol doesn't need ApplicationAttemptId in the payload after YARN-701**
+* [YARN-748](https://issues.apache.org/jira/browse/YARN-748) | *Major* | **Move BuilderUtils from yarn-common to yarn-server-common**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-869](https://issues.apache.org/jira/browse/YARN-869) | *Blocker* | **ResourceManagerAdministrationProtocol should neither be public(yet) nor in yarn.api**
+* [YARN-635](https://issues.apache.org/jira/browse/YARN-635) | *Major* | **Rename YarnRemoteException to YarnException**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-851](https://issues.apache.org/jira/browse/YARN-851) | *Major* | **Share NMTokens using NMTokenCache (api-based) instead of memory based approach which is used currently.**
+* [YARN-755](https://issues.apache.org/jira/browse/YARN-755) | *Major* | **Rename AllocateResponse.reboot to AllocateResponse.resync**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-841](https://issues.apache.org/jira/browse/YARN-841) | *Major* | **Annotate and document AuxService APIs**
+* [YARN-756](https://issues.apache.org/jira/browse/YARN-756) | *Major* | **Move PreemptionContainer/PremptionContract/PreemptionMessage/StrictPreemptionContract/PreemptionResourceRequest to api.records**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-840](https://issues.apache.org/jira/browse/YARN-840) | *Major* | **Move ProtoUtils to  yarn.api.records.pb.impl**
+* [YARN-753](https://issues.apache.org/jira/browse/YARN-753) | *Major* | **Add individual factory method for api protocol records**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-837](https://issues.apache.org/jira/browse/YARN-837) | *Major* | **ClusterInfo.java doesn't seem to belong to org.apache.hadoop.yarn**
+* [YARN-724](https://issues.apache.org/jira/browse/YARN-724) | *Major* | **Move ProtoBase from api.records to api.records.impl.pb**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-834](https://issues.apache.org/jira/browse/YARN-834) | *Blocker* | **Review/fix annotations for yarn-client module and clearly differentiate \*Async apis**
+* [HDFS-4832](https://issues.apache.org/jira/browse/HDFS-4832) | *Critical* | **Namenode doesn't change the number of missing blocks in safemode when DNs rejoin or leave**
 
-**WARNING: No release note provided for this incompatible change.**
+This change makes name node keep its internal replication queues and data node state updated in manual safe mode. This allows metrics and UI to present up-to-date information while in safe mode. The behavior during start-up safe mode is unchanged.
 
 
 ---
 
-* [YARN-831](https://issues.apache.org/jira/browse/YARN-831) | *Blocker* | **Remove resource min from GetNewApplicationResponse**
+* [YARN-777](https://issues.apache.org/jira/browse/YARN-777) | *Major* | **Remove unreferenced objects from proto**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-829](https://issues.apache.org/jira/browse/YARN-829) | *Major* | **Rename RMTokenSelector to be RMDelegationTokenSelector**
+* [YARN-642](https://issues.apache.org/jira/browse/YARN-642) | *Major* | **Fix up /nodes REST API to have 1 param and be consistent with the Java API**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-828](https://issues.apache.org/jira/browse/YARN-828) | *Major* | **Remove YarnVersionAnnotation**
+* [HADOOP-9630](https://issues.apache.org/jira/browse/HADOOP-9630) | *Major* | **Remove IpcSerializationType**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-826](https://issues.apache.org/jira/browse/YARN-826) | *Major* | **Move Clock/SystemClock to util package**
+* [MAPREDUCE-5304](https://issues.apache.org/jira/browse/MAPREDUCE-5304) | *Blocker* | **mapreduce.Job killTask/failTask/getTaskCompletionEvents methods have incompatible signature changes**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-824](https://issues.apache.org/jira/browse/YARN-824) | *Major* | **Add  static factory to yarn client lib interface and change it to abstract class**
+* [YARN-530](https://issues.apache.org/jira/browse/YARN-530) | *Major* | **Define Service model strictly, implement AbstractService for robust subclassing, migrate yarn-common services**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-823](https://issues.apache.org/jira/browse/YARN-823) | *Major* | **Move RMAdmin from yarn.client to yarn.client.cli and rename as RMAdminCLI**
+* [YARN-746](https://issues.apache.org/jira/browse/YARN-746) | *Major* | **rename Service.register() and Service.unregister() to registerServiceListener() & unregisterServiceListener() respectively**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-822](https://issues.apache.org/jira/browse/YARN-822) | *Major* | **Rename ApplicationToken to AMRMToken**
+* [YARN-792](https://issues.apache.org/jira/browse/YARN-792) | *Major* | **Move NodeHealthStatus from yarn.api.record to yarn.server.api.record**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-821](https://issues.apache.org/jira/browse/YARN-821) | *Major* | **Rename FinishApplicationMasterRequest.setFinishApplicationStatus to setFinalApplicationStatus to be consistent with getter**
+* [YARN-806](https://issues.apache.org/jira/browse/YARN-806) | *Major* | **Move ContainerExitStatus from yarn.api to yarn.api.records**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-806](https://issues.apache.org/jira/browse/YARN-806) | *Major* | **Move ContainerExitStatus from yarn.api to yarn.api.records**
+* [MAPREDUCE-4942](https://issues.apache.org/jira/browse/MAPREDUCE-4942) | *Major* | **mapreduce.Job has a bunch of methods that throw InterruptedException so its incompatible with MR1**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-792](https://issues.apache.org/jira/browse/YARN-792) | *Major* | **Move NodeHealthStatus from yarn.api.record to yarn.server.api.record**
+* [HDFS-4866](https://issues.apache.org/jira/browse/HDFS-4866) | *Blocker* | **Protocol buffer support cannot compile under C**
 
-**WARNING: No release note provided for this incompatible change.**
+The Protocol Buffers definition of the inter-namenode protocol required a change for compatibility with compiled C clients.  This is a backwards-incompatible change.  A namenode prior to this change will not be able to communicate with a namenode after this change.
 
 
 ---
 
-* [YARN-791](https://issues.apache.org/jira/browse/YARN-791) | *Blocker* | **Ensure that RM RPC APIs that return nodes are consistent with /nodes REST API**
+* [YARN-821](https://issues.apache.org/jira/browse/YARN-821) | *Major* | **Rename FinishApplicationMasterRequest.setFinishApplicationStatus to setFinalApplicationStatus to be consistent with getter**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
 * [YARN-787](https://issues.apache.org/jira/browse/YARN-787) | *Blocker* | **Remove resource min from Yarn client API**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-777](https://issues.apache.org/jira/browse/YARN-777) | *Major* | **Remove unreferenced objects from proto**
+* [MAPREDUCE-5184](https://issues.apache.org/jira/browse/MAPREDUCE-5184) | *Major* | **Document MR Binary Compatibility vis-a-vis hadoop-1 and hadoop-2**
 
-**WARNING: No release note provided for this incompatible change.**
+Document MR Binary Compatibility vis-a-vis hadoop-1 and hadoop-2 for end-users.
 
 
 ---
 
-* [YARN-756](https://issues.apache.org/jira/browse/YARN-756) | *Major* | **Move PreemptionContainer/PremptionContract/PreemptionMessage/StrictPreemptionContract/PreemptionResourceRequest to api.records**
+* [YARN-829](https://issues.apache.org/jira/browse/YARN-829) | *Major* | **Rename RMTokenSelector to be RMDelegationTokenSelector**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-755](https://issues.apache.org/jira/browse/YARN-755) | *Major* | **Rename AllocateResponse.reboot to AllocateResponse.resync**
+* [YARN-828](https://issues.apache.org/jira/browse/YARN-828) | *Major* | **Remove YarnVersionAnnotation**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-753](https://issues.apache.org/jira/browse/YARN-753) | *Major* | **Add individual factory method for api protocol records**
+* [YARN-823](https://issues.apache.org/jira/browse/YARN-823) | *Major* | **Move RMAdmin from yarn.client to yarn.client.cli and rename as RMAdminCLI**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-749](https://issues.apache.org/jira/browse/YARN-749) | *Major* | **Rename ResourceRequest (get,set)HostName to (get,set)ResourceName**
+* [YARN-387](https://issues.apache.org/jira/browse/YARN-387) | *Blocker* | **Fix inconsistent protocol naming**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-748](https://issues.apache.org/jira/browse/YARN-748) | *Major* | **Move BuilderUtils from yarn-common to yarn-server-common**
+* [YARN-831](https://issues.apache.org/jira/browse/YARN-831) | *Blocker* | **Remove resource min from GetNewApplicationResponse**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-746](https://issues.apache.org/jira/browse/YARN-746) | *Major* | **rename Service.register() and Service.unregister() to registerServiceListener() & unregisterServiceListener() respectively**
+* [YARN-824](https://issues.apache.org/jira/browse/YARN-824) | *Major* | **Add  static factory to yarn client lib interface and change it to abstract class**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-735](https://issues.apache.org/jira/browse/YARN-735) | *Major* | **Make ApplicationAttemptID, ContainerID, NodeID immutable**
+* [YARN-826](https://issues.apache.org/jira/browse/YARN-826) | *Major* | **Move Clock/SystemClock to util package**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-724](https://issues.apache.org/jira/browse/YARN-724) | *Major* | **Move ProtoBase from api.records to api.records.impl.pb**
+* [HADOOP-9649](https://issues.apache.org/jira/browse/HADOOP-9649) | *Blocker* | **Promote YARN service life-cycle libraries into Hadoop Common**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-720](https://issues.apache.org/jira/browse/YARN-720) | *Major* | **container-log4j.properties should not refer to mapreduce properties**
+* [YARN-837](https://issues.apache.org/jira/browse/YARN-837) | *Major* | **ClusterInfo.java doesn't seem to belong to org.apache.hadoop.yarn**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-716](https://issues.apache.org/jira/browse/YARN-716) | *Major* | **Make ApplicationID immutable**
+* [YARN-822](https://issues.apache.org/jira/browse/YARN-822) | *Major* | **Rename ApplicationToken to AMRMToken**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-701](https://issues.apache.org/jira/browse/YARN-701) | *Blocker* | **ApplicationTokens should be used irrespective of kerberos**
+* [YARN-610](https://issues.apache.org/jira/browse/YARN-610) | *Blocker* | **ClientToken (ClientToAMToken) should not be set in the environment**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-694](https://issues.apache.org/jira/browse/YARN-694) | *Major* | **Start using NMTokens to authenticate all communication with NM**
+* [YARN-834](https://issues.apache.org/jira/browse/YARN-834) | *Blocker* | **Review/fix annotations for yarn-client module and clearly differentiate \*Async apis**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-684](https://issues.apache.org/jira/browse/YARN-684) | *Major* | **ContainerManager.startContainer needs to only have ContainerTokenIdentifier instead of the whole Container**
+* [YARN-840](https://issues.apache.org/jira/browse/YARN-840) | *Major* | **Move ProtoUtils to  yarn.api.records.pb.impl**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-642](https://issues.apache.org/jira/browse/YARN-642) | *Major* | **Fix up /nodes REST API to have 1 param and be consistent with the Java API**
+* [YARN-841](https://issues.apache.org/jira/browse/YARN-841) | *Major* | **Annotate and document AuxService APIs**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-635](https://issues.apache.org/jira/browse/YARN-635) | *Major* | **Rename YarnRemoteException to YarnException**
+* [YARN-694](https://issues.apache.org/jira/browse/YARN-694) | *Major* | **Start using NMTokens to authenticate all communication with NM**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-633](https://issues.apache.org/jira/browse/YARN-633) | *Major* | **Change RMAdminProtocol api to throw IOException and YarnRemoteException**
+* [YARN-553](https://issues.apache.org/jira/browse/YARN-553) | *Minor* | **Have YarnClient generate a directly usable ApplicationSubmissionContext**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-632](https://issues.apache.org/jira/browse/YARN-632) | *Major* | **Change ContainerManager api to throw IOException and YarnRemoteException**
+* [YARN-851](https://issues.apache.org/jira/browse/YARN-851) | *Major* | **Share NMTokens using NMTokenCache (api-based) instead of memory based approach which is used currently.**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-631](https://issues.apache.org/jira/browse/YARN-631) | *Major* | **Change ClientRMProtocol api to throw IOException and YarnRemoteException**
+* [HADOOP-9421](https://issues.apache.org/jira/browse/HADOOP-9421) | *Blocker* | **Convert SASL to use ProtoBuf and provide negotiation capabilities**
 
-**WARNING: No release note provided for this incompatible change.**
+Raw SASL protocol now uses protobufs wrapped with RPC headers.
+The negotiation sequence incorporates the state of the exchange.
+The server now has the ability to advertise its supported auth types.
 
 
 ---
 
-* [YARN-630](https://issues.apache.org/jira/browse/YARN-630) | *Major* | **Change AMRMProtocol api to throw IOException and YarnRemoteException**
+* [YARN-869](https://issues.apache.org/jira/browse/YARN-869) | *Blocker* | **ResourceManagerAdministrationProtocol should neither be public(yet) nor in yarn.api**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-629](https://issues.apache.org/jira/browse/YARN-629) | *Major* | **Make YarnRemoteException not be rooted at IOException**
+* [YARN-791](https://issues.apache.org/jira/browse/YARN-791) | *Blocker* | **Ensure that RM RPC APIs that return nodes are consistent with /nodes REST API**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-615](https://issues.apache.org/jira/browse/YARN-615) | *Major* | **ContainerLaunchContext.containerTokens should simply be called tokens**
+* [HADOOP-9683](https://issues.apache.org/jira/browse/HADOOP-9683) | *Blocker* | **Wrap IpcConnectionContext in RPC headers**
 
-**WARNING: No release note provided for this incompatible change.**
+Connection context is now sent as a rpc header wrapped protobuf.
 
 
 ---
 
-* [YARN-610](https://issues.apache.org/jira/browse/YARN-610) | *Blocker* | **ClientToken (ClientToAMToken) should not be set in the environment**
+* [YARN-701](https://issues.apache.org/jira/browse/YARN-701) | *Blocker* | **ApplicationTokens should be used irrespective of kerberos**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-579](https://issues.apache.org/jira/browse/YARN-579) | *Major* | **Make ApplicationToken part of Container's token list to help RM-restart**
+* [HDFS-4996](https://issues.apache.org/jira/browse/HDFS-4996) | *Minor* | **ClientProtocol#metaSave can be made idempotent by overwriting the output file instead of appending to it**
 
-**WARNING: No release note provided for this incompatible change.**
+The dfsadmin -metasave command has been changed to overwrite the output file.  Previously, this command would append to the output file if it already existed.
 
 
 ---
 
-* [YARN-571](https://issues.apache.org/jira/browse/YARN-571) | *Major* | **User should not be part of ContainerLaunchContext**
+* [YARN-918](https://issues.apache.org/jira/browse/YARN-918) | *Blocker* | **ApplicationMasterProtocol doesn't need ApplicationAttemptId in the payload after YARN-701**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-561](https://issues.apache.org/jira/browse/YARN-561) | *Major* | **Nodemanager should set some key information into the environment of every container that it launches.**
+* [YARN-926](https://issues.apache.org/jira/browse/YARN-926) | *Blocker* | **ContainerManagerProtcol APIs should take in requests for multiple containers**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-553](https://issues.apache.org/jira/browse/YARN-553) | *Minor* | **Have YarnClient generate a directly usable ApplicationSubmissionContext**
+* [HADOOP-9698](https://issues.apache.org/jira/browse/HADOOP-9698) | *Blocker* | **RPCv9 client must honor server's SASL negotiate response**
 
-**WARNING: No release note provided for this incompatible change.**
+The RPC client now waits for the Server's SASL negotiate response before instantiating its SASL client.
 
 
 ---
 
-* [YARN-536](https://issues.apache.org/jira/browse/YARN-536) | *Major* | **Remove ContainerStatus, ContainerState from Container api interface as they will not be called by the container object**
+* [HADOOP-9832](https://issues.apache.org/jira/browse/HADOOP-9832) | *Blocker* | **Add RPC header to client ping**
 
-**WARNING: No release note provided for this incompatible change.**
+Client ping will be sent as a RPC header with a reserved callId instead of as a sentinel RPC packet length.
 
 
 ---
 
-* [YARN-530](https://issues.apache.org/jira/browse/YARN-530) | *Major* | **Define Service model strictly, implement AbstractService for robust subclassing, migrate yarn-common services**
+* [MAPREDUCE-5399](https://issues.apache.org/jira/browse/MAPREDUCE-5399) | *Blocker* | **Unnecessary Configuration instantiation in IFileInputStream slows down merge**
 
-**WARNING: No release note provided for this incompatible change.**
+Fixes blank Configuration object creation overhead by reusing the Job configuration in InMemoryReader.
 
 
 ---
 
-* [YARN-440](https://issues.apache.org/jira/browse/YARN-440) | *Major* | **Flatten RegisterNodeManagerResponse**
+* [HADOOP-9820](https://issues.apache.org/jira/browse/HADOOP-9820) | *Blocker* | **RPCv9 wire protocol is insufficient to support multiplexing**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-439](https://issues.apache.org/jira/browse/YARN-439) | *Major* | **Flatten NodeHeartbeatResponse**
+* [HDFS-5083](https://issues.apache.org/jira/browse/HDFS-5083) | *Blocker* | **Update the HDFS compatibility version range**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-396](https://issues.apache.org/jira/browse/YARN-396) | *Major* | **Rationalize AllocateResponse in RM scheduler API**
+* [YARN-1056](https://issues.apache.org/jira/browse/YARN-1056) | *Trivial* | **Fix configs yarn.resourcemanager.resourcemanager.connect.{max.wait.secs\|retry\_interval.secs}**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 ---
 
-* [YARN-387](https://issues.apache.org/jira/browse/YARN-387) | *Blocker* | **Fix inconsistent protocol naming**
+* [HDFS-2802](https://issues.apache.org/jira/browse/HDFS-2802) | *Major* | **Support for RW/RO snapshots in HDFS**
 
-**WARNING: No release note provided for this incompatible change.**
+**WARNING: No release note provided for this change.**
 
 
 


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