hadoop/hadoop-yarn-project/CHANGES.txt

Hadoop YARN Change Log

Trunk - Unreleased 

  INCOMPATIBLE CHANGES

  NEW FEATURES

    HADOOP-8562. Enhancements to support Hadoop on Windows Server and Windows
    Azure environments. (See breakdown of tasks below for subtasks and
    contributors)

  IMPROVEMENTS

    YARN-84. Use Builder to build RPC server. (Brandon Li via suresh)

  OPTIMAZATIONS

  BUG FIXES

    YARN-488. TestContainerManagerSecurity fails on Windows. (Chris Nauroth
    via hitesh)

    YARN-490. TestDistributedShell fails on Windows. (Chris Nauroth via hitesh)

    YARN-491. TestContainerLogsPage fails on Windows. (Chris Nauroth via hitesh)

    YARN-557. Fix TestUnmanagedAMLauncher failure on Windows. (Chris Nauroth via
    vinodkv)

    YARN-524 TestYarnVersionInfo failing if generated properties doesn't
    include an SVN URL. (stevel)

    YARN-487. Modify path manipulation in LocalDirsHandlerService to let
    TestDiskFailures pass on Windows. (Chris Nauroth via vinodkv)

    YARN-493. Fixed some shell related flaws in YARN on Windows. (Chris Nauroth
    via vinodkv)

    YARN-593. container launch on Windows does not correctly populate
    classpath with new process's environment variables and localized resources
    (Chris Nauroth via bikas)

    YARN-597. TestFSDownload fails on Windows due to dependencies on
    tar/gzip/jar tools. (Ivan Mitic via acmurthy) 

  BREAKDOWN OF HADOOP-8562 SUBTASKS AND RELATED JIRAS

    YARN-158. Yarn creating package-info.java must not depend on sh.
    (Chris Nauroth via suresh)

    YARN-176. Some YARN tests fail to find winutils. (Chris Nauroth via suresh)
    
    YARN-207. YARN distribution build fails on Windows. (Chris Nauroth via
    suresh)

    YARN-199. Yarn cmd line scripts for windows. (Ivan Mitic via suresh)

    YARN-213. YARN build script would be more readable using abspath.
    (Chris Nauroth via suresh)

    YARN-233. Added support for running containers in MS Windows to YARN. (Chris
    Nauroth via acmurthy)

    YARN-234. Added support for process tree and resource calculator in MS Windows 
    to YARN. (Chris Nauroth via acmurthy)

    YARN-259. Fix LocalDirsHandlerService to use Path rather than URIs. (Xuan
    Gong via acmurthy) 

    YARN-316. YARN container launch may exceed maximum Windows command line 
    length due to long classpath. (Chris Nauroth via suresh)

    YARN-359. Fixing commands for container signalling in Windows. (Chris Nauroth
    via vinodkv)

    YARN-506. Move to common utils FileUtil#setReadable/Writable/Executable and 
    FileUtil#canRead/Write/Execute. (Ivan Mitic via suresh)

    
Release 2.0.5-beta - UNRELEASED

  INCOMPATIBLE CHANGES

    YARN-396. Rationalize AllocateResponse in RM Scheduler API. (Zhijie Shen
    via hitesh)

    YARN-439. Flatten NodeHeartbeatResponse. (Xuan Gong via sseth)

    YARN-440. Flatten RegisterNodeManagerResponse. (Xuan Gong via sseth)

    YARN-536. Removed the unused objects ContainerStatus and ContainerStatus from
    Container which also don't belong to the container. (Xuan Gong via vinodkv)

    YARN-486. Changed NM's startContainer API to accept Container record given by
    RM as a direct parameter instead of as part of the ContainerLaunchContext
    record. (Xuan Gong via vinodkv)

    YARN-444. Moved special container exit codes from YarnConfiguration to API
    where they belong. (Sandy Ryza via vinodkv)

    YARN-441. Removed unused utility methods for collections from two API
    records. (Xuan Gong via vinodkv)

    YARN-561. Modified NodeManager to set key information into the environment
    of every container that it launches. (Xuan Gong via vinodkv)

    YARN-579. Stop setting the Application Token in the AppMaster env, in
    favour of the copy present in the container token field. 
    (Vinod Kumar Vavilapalli via sseth)

    YARN-629. Make YarnRemoteException not be rooted at IOException. (Xuan Gong
    via vinodkv)

    YARN-633. Changed RMAdminProtocol api to throw IOException and
    YarnRemoteException. (Xuan Gong via vinodkv)

    YARN-632. Changed ContainerManager api to throw IOException and
    YarnRemoteException. (Xuan Gong via vinodkv)

    YARN-631. Changed ClientRMProtocol api to throw IOException and
    YarnRemoteException. (Xuan Gong via vinodkv)

    YARN-630. Changed AMRMProtocol api to throw IOException and
    YarnRemoteException. (Xuan Gong via vinodkv)

    YARN-615. Rename ContainerLaunchContext.containerTokens to tokens.
    (Vinod Kumar Vavilapalli via sseth)

  NEW FEATURES

    YARN-482. FS: Extend SchedulingMode to intermediate queues. 
    (kkambatl via tucu)

    YARN-45. Add protocol for schedulers to request containers back from
    ApplicationMasters. (Carlo Curino, cdouglas)

  IMPROVEMENTS

    YARN-365. Change NM heartbeat handling to not generate a scheduler event
    on each heartbeat. (Xuan Gong via sseth)

    YARN-380. Fix yarn node -status output to be better readable. (Omkar Vinit
    Joshi via vinodkv)

    YARN-410. Fixed RM UI so that the new lines diagnostics for a failed app on
    the per-application page are translated to html line breaks. (Omkar Vinit
    Joshi via vinodkv)

    YARN-198. Added a link to RM pages from the NodeManager web app. (Jian He
    via vinodkv)

    YARN-237. Refreshing the RM page forgets how many rows I had in my
    Datatables (jian he via bobby)

    YARN-481. Add AM Host and RPC Port to ApplicationCLI Status Output 
    (Chris Riccomini via bikas)

    YARN-297. Improve hashCode implementations for PB records. (Xuan Gong via
    hitesh)

    YARN-417. Create AMRMClient wrapper that provides asynchronous callbacks.
    (Sandy Ryza via bikas)

    YARN-497. Yarn unmanaged-am launcher jar does not define a main class in
    its manifest (Hitesh Shah via bikas)

    YARN-469. Make scheduling mode in FS pluggable. (kkambatl via tucu)

    YARN-450. Define value for * in the scheduling protocol (Zhijie Shen via
    bikas)

    YARN-475. Remove a unused constant in the public API -
    ApplicationConstants.AM_APP_ATTEMPT_ID_ENV. (Hitesh Shah via vinodkv)

    YARN-309. Changed NodeManager to obtain heart-beat interval from the
    ResourceManager. (Xuan Gong via vinodkv)

    YARN-447. Move ApplicationComparator in CapacityScheduler to use comparator
    in ApplicationId. (Nemon Lou via vinodkv)

    YARN-381. Improve fair scheduler docs. (Sandy Ryza via tomwhite)

    YARN-458. YARN daemon addresses must be placed in many different configs. 
    (sandyr via tucu)

    YARN-193. Scheduler.normalizeRequest does not account for allocation
    requests that exceed maximumAllocation limits (Zhijie Shen via bikas)

    YARN-479. NM retry behavior for connection to RM should be similar for
    lost heartbeats (Jian He via bikas)

    YARN-495. Changed NM reboot behaviour to be a simple resync - kill all
    containers  and re-register with RM. (Jian He via vinodkv)

    YARN-514. Delayed store operations should not result in RM unavailability
    for app submission (Zhijie Shen via bikas)

    YARN-586. Fixed a typo in ApplicationSubmissionContext#setApplicationId.
    (Zhijie Shen via vinodkv)

    YARN-542. Changed the default global AM max-attempts value to be not one.
    (Zhijie Shen via vinodkv)

    YARN-583. Moved application level local resources to be localized under the
    filecache sub-directory under application directory. (Omkar Vinit Joshi via
    vinodkv)

    YARN-581. Added a test to verify that app delegation tokens are restored
    after RM restart. (Jian He via vinodkv)

    YARN-577. Add application-progress also to ApplicationReport. (Hitesh Shah
    via vinodkv)

    YARN-595. Refactor fair scheduler to use common Resources. (Sandy Ryza
    via tomwhite)

    YARN-562. Modified NM to reject any containers allocated by a previous
    ResourceManager. (Jian He via vinodkv)

    YARN-591. Moved RM recovery related records out of public API as they do not
    belong there. (vinodkv)

    YARN-599. Refactoring submitApplication in ClientRMService and RMAppManager
    to separate out various validation checks depending on whether they rely on
    RM configuration or not. (Zhijie Shen via vinodkv)

    YARN-618. Modified RM_INVALID_IDENTIFIER to be -1 instead of zero. (Jian He
    via vinodkv)

    YARN-625. Move the utility method unwrapAndThrowException from
    YarnRemoteExceptionPBImpl to RPCUtil. (Siddharth Seth via vinodkv)

    YARN-645. Moved RMDelegationTokenSecretManager from yarn-server-common to
    yarn-server-resourcemanager where it really belongs. (Jian He via vinodkv)

    YARN-651. Changed PBClientImpls of ContainerManager and RMAdmin to throw
    IOExceptions also. (Xuan Gong via vinodkv)

    YARN-582. Changed ResourceManager to recover Application token and client
    tokens for app attempt so that RM can be restarted while preserving current
    applications. (Jian He via vinodkv)

    YARN-568. Add support for work preserving preemption to the FairScheduler.
    (Carlo Curino and Sandy Ryza via cdouglas)

    YARN-598. Add virtual cores to queue metrics. (sandyr via tucu)

    YARN-634. Modified YarnRemoteException to be not backed by PB and introduced
    a separate SerializedException record. (Siddharth Seth via vinodkv)

    YARN-663. Changed ResourceTracker API and LocalizationProtocol API to throw
    YarnRemoteException and IOException. (Xuan Gong via vinodkv)

    YARN-590. Added an optional mesage to be returned by ResourceMaanger when RM
    asks an RM to shutdown/resync etc so that NMs can log this message locally
    for better debuggability. (Mayank Bansal via vinodkv)

    YARN-617. Made ContainerTokens to be used for validation at NodeManager
    also in unsecure mode to prevent AMs from faking resource requirements in
    unsecure mode. (Omkar Vinit Joshi via vinodkv)

  OPTIMIZATIONS

  BUG FIXES

    YARN-383. AMRMClientImpl should handle null rmClient in stop()
    (Hitesh Shah via sseth)

    YARN-385. Add missing fields - location and #containers to
    ResourceRequestPBImpl's toString(). (Sandy Ryza via sseth)

    YARN-377. Use the new StringUtils methods added by HADOOP-9252 and fix
    TestContainersMonitor.  (Chris Nauroth via szetszwo)

    YARN-391. Formatting fixes for LCEResourceHandler classes.
    (Steve Loughran via sseth)

    YARN-390. ApplicationCLI and NodeCLI hard-coded platform-specific line
    separator causes test failures on Windows. (Chris Nauroth via suresh)

    YARN-406. Fix TestRackResolver to function in networks where "host1"
    resolves to a valid host. (Hitesh Shah via sseth)

    YARN-376. Fixes a bug which would prevent the NM knowing about completed
    containers and applications. (Jason Lowe via sseth)

    YARN-196. Nodemanager should be more robust in handling connection failure
    to ResourceManager when a cluster is started (Xuan Gong via hitesh)

    YARN-485. TestProcfsProcessTree#testProcessTree() doesn't wait long enough 
    for the process to die. (kkambatl via tucu)
 
    YARN-71. Fix the NodeManager to clean up local-dirs on restart.
    (Xuan Gong via sseth)

    YARN-378. Fix RM to make the AM max attempts/retries to be configurable
    per application by clients. (Zhijie Shen via vinodkv)

    YARN-498. Unmanaged AM launcher does not set various constants in env for
    an AM, also does not handle failed AMs properly. (Hitesh Shah via bikas)

    YARN-474. Fix CapacityScheduler to trigger application-activation when
    am-resource-percent configuration is refreshed. (Zhijie Shen via vinodkv)

    YARN-496. Fair scheduler configs are refreshed inconsistently in
    reinitialize. (Sandy Ryza via tomwhite)

    YARN-209. Fix CapacityScheduler to trigger application-activation when
    the cluster capacity changes. (Zhijie Shen via vinodkv)

    YARN-24. Nodemanager fails to start if log aggregation enabled and 
    namenode unavailable. (sandyr via tucu)

    YARN-515. Node Manager not getting the master key. (Robert Joseph Evans
    via jlowe)

    YARN-382. SchedulerUtils improve way normalizeRequest sets the resource
    capabilities. (Zhijie Shen via bikas)

    YARN-467. Modify public distributed cache to localize files such that no
    local directory hits unix file count limits and thus prevent job failures.
    (Omkar Vinit Joshi via vinodkv)

    YARN-101. Fix NodeManager heartbeat processing to not lose track of completed
    containers in case of dropped heartbeats. (Xuan Gong via vinodkv)

    YARN-538. RM address DNS lookup can cause unnecessary slowness on every JHS 
    page load. (sandyr via tucu)

    YARN-532. Change RMAdmin and Localization client protocol PB implementations
    to implement closeable so that they can be stopped when needed via
    RPC.stopProxy(). (Siddharth Seth via vinodkv)

    YARN-99. Modify private distributed cache to localize files such that no
    local directory hits unix file count limits and thus prevent job failures.
    (Omkar Vinit Joshi via vinodkv)

    YARN-112. Fixed a race condition during localization that fails containers.
    (Omkar Vinit Joshi via vinodkv)

    YARN-534. Change RM restart recovery to also account for AM max-attempts 
    configuration after the restart. (Jian He via vinodkv)

    YARN-539. Addressed memory leak of LocalResource objects NM when a resource
    localization fails. (Omkar Vinit Joshi via vinodkv)

    YARN-319. Submitting a job to a fair scheduler queue for which the user
    does not have permission causes the client to wait forever.
    (shenhong via tomwhite)

    YARN-412. Fixed FifoScheduler to check hostname of a NodeManager rather
    than its host:port during scheduling which caused incorrect locality for
    containers. (Roger Hoover via acmurthy)

    YARN-500. Fixed YARN webapps to not roll-over ports when explicitly asked
    to use non-ephemeral ports. (Kenji Kikushima via vinodkv)

    YARN-518. Fair Scheduler's document link could be added to the hadoop 2.x 
    main doc page. (sandyr via tucu)

    YARN-476. ProcfsBasedProcessTree info message confuses users. 
    (sandyr via tucu)

    YARN-585. Fix failure in TestFairScheduler#testNotAllowSubmitApplication
    caused by YARN-514. (Zhijie Shen via vinodkv)

    YARN-547. Fixed race conditions in public and private resource localization
    which used to cause duplicate downloads. (Omkar Vinit Joshi via vinodkv)

    YARN-594. Update test and add comments in YARN-534 (Jian He via bikas)

    YARN-549. YarnClient.submitApplication should wait for application to be
    accepted by the RM (Zhijie Shen via bikas)

    YARN-605. Fix failing unit test in TestNMWebServices when versionInfo has
    parantheses like when running on a git checkout. (Hitesh Shah via vinodkv)

    YARN-289. Fair scheduler allows reservations that won't fit on node.
    (Sandy Ryza via tomwhite)

    YARN-576. Modified ResourceManager to reject NodeManagers that don't satisy
    minimum resource requirements. (Kenji Kikushima via vinodkv)

    YARN-646. Fix two typos in Fair Scheduler user guide. (Dapeng Sun via atm)

    YARN-507. Add interface visibility and stability annotations to FS 
    interfaces/classes. (kkambatl via tucu)

    YARN-637. FS: maxAssign is not honored. (kkambatl via tucu)

    YARN-655. Fair scheduler metrics should subtract allocated memory from 
    available memory. (sandyr via tucu)

    YARN-628. Fix the way YarnRemoteException is being unrolled to extract out
    the underlying exception. (Siddharth Seth via vinodkv)

    YARN-695. Remove masterContainer and status unused fields from
    ApplicationReportProto and fix bugs in ApplicationReportPBImpl. (Zhijie Shen
    via vinodkv)

    YARN-706. Fixed race conditions in TestFSDownload. (Zhijie Shen via vinodkv).

Release 2.0.4-alpha - 2013-04-25 

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

  OPTIMIZATIONS

  BUG FIXES

    YARN-429. capacity-scheduler config missing from yarn-test artifact.
    (sseth via hitesh)

    YARN-470. Support a way to disable resource monitoring on the NodeManager.
    (Siddharth Seth via hitesh)
    
Release 2.0.3-alpha - 2013-02-06 

  INCOMPATIBLE CHANGES

  NEW FEATURES

    YARN-145. Add a Web UI to the fair share scheduler. (Sandy Ryza via tomwhite)

    YARN-3. Add support for CPU isolation/monitoring of containers. 
    (adferguson via tucu)

    YARN-230. RM Restart phase 1 - includes support for saving/restarting all
    applications on an RM bounce. (Bikas Saha via acmurthy)

    YARN-103. Add a yarn AM-RM client module. (Bikas Saha via sseth)

    YARN-286. Add a YARN ApplicationClassLoader. (tomwhite)

    YARN-2. Enhanced CapacityScheduler to account for CPU alongwith memory for
    multi-dimensional resource scheduling. (acmurthy)

    YARN-328. Use token request messages defined in hadoop common. (suresh)

    YARN-231. RM Restart - Add FS-based persistent store implementation for
    RMStateStore (Bikas Saha via hitesh)

  IMPROVEMENTS

    YARN-223. Update process tree instead of getting new process trees.
    (Radim Kolar via llu)

    YARN-57. Allow process-tree based resource calculation et al. to be
    pluggable to support it on multiple platforms. (Radim Kolar via acmurthy)

    YARN-78. Changed UnManagedAM application to use YarnClient. (Bikas Saha via
    vinodkv)

    YARN-93. Fixed RM to propagate diagnostics from applications that have
    finished but failed (Jason Lowe via vinodkv). 

    YARN-28. Fixed TestCompositeService to not depend on test-order and thus
    made it pass on JDK7 (Thomas Graves via vinodkv).

    YARN-82. Change the default local and log dirs to be based on
    hadoop.tmp.dir and yarn.log.dir. (Hemanth Yamijala via sseth)

    YARN-53. Added the missing getGroups API to ResourceManager. (Bo Wang via
    vinodkv)

    YARN-116. Add the ability to change the RM include/exclude file without
    a restart. (xieguiming and Harsh J via sseth)

    YARN-23. FairScheduler: FSQueueSchedulable#updateDemand() - potential 
    redundant aggregation. (kkambatl via tucu)

    YARN-127. Move RMAdmin tool to its correct location - the client module.
    (vinodkv)

    YARN-40. Provided support for missing YARN commands (Devaraj K and Vinod
    Kumar Vavilapalli via vinodkv)

    YARN-33. Change LocalDirsHandlerService to validate the configured local and
    log dirs. (Mayank Bansal via sseth)

    YARN-94. Modify DistributedShell to point to main-class by default, clean up
    the help message, and hard-code the AM class. (Hitesh Shah via vinodkv)

    YARN-146. Add unit tests for computing fair share in the fair scheduler.
    (Sandy Ryza via tomwhite)

    HADOOP-8911. CRLF characters in source and text files.
    (Raja Aluri via suresh)

    YARN-136. Make ClientToAMTokenSecretManager part of RMContext (Vinod Kumar
    Vavilapalli via sseth)

    YARN-183. Clean up fair scheduler code. (Sandy Ryza via tomwhite)

    YARN-129. Simplify classpath construction for mini YARN tests. (tomwhite)

    YARN-254. Update fair scheduler web UI for hierarchical queues. 
    (sandyr via tucu)

    YARN-315. Using the common security token protobuf definition from hadoop
    common. (Suresh Srinivas via vinodkv) 

    YARN-170. Change NodeManager stop to be reentrant. (Sandy Ryza via vinodkv)

    YARN-331. Fill in missing fair scheduler documentation. (sandyr via tucu)

    YARN-277. Use AMRMClient in DistributedShell to exemplify the approach.
    (Bikas Saha via hitesh)

    YARN-360. Allow apps to concurrently register tokens for renewal.
    (Daryn Sharp via sseth)

  OPTIMIZATIONS

  BUG FIXES
    
    YARN-131. Fix incorrect ACL properties in capacity scheduler documentation.
    (Ahmed Radwan via sseth)

    YARN-102. Move the apache header to the top of the file in MemStore.java.
    (Devaraj K via sseth)
    
    YARN-134. ClientToAMSecretManager creates keys without checking for
    validity of the appID. (Vinod Kumar Vavilapalli via sseth)

    YARN-30. Fixed tests verifying web-services to work on JDK7. (Thomas Graves
    via vinodkv)

    YARN-150. Fixes AppRejectedTransition does not unregister a rejected
    app-attempt from the ApplicationMasterService (Bikas Saha via sseth)

    YARN-140. Add capacity-scheduler-default.xml to provide a default set of
    configurations for the capacity scheduler. (ahmed via tucu)

    YARN-179. Fix some unit test failures. (Vinod Kumar Vavilapalli via sseth)

    YARN-181. Fixed eclipse settings broken by capacity-scheduler.xml move via
    YARN-140. (Siddharth Seth via vinodkv)

    YARN-169. Update log4j.appender.EventCounter to use
    org.apache.hadoop.log.metrics.EventCounter (Anthony Rojas via tomwhite)

    YARN-184. Remove unnecessary locking in fair scheduler, and address 
    findbugs excludes. (sandyr via tucu)

    YARN-224. Fair scheduler logs too many nodeUpdate INFO messages.
    (Sandy Ryza via tomwhite)

    YARN-222. Fair scheduler should create queue for each user by default.
    (Sandy Ryza via tomwhite)

    MAPREDUCE-4778. Fair scheduler event log is only written if directory
    exists on HDFS. (Sandy Ryza via tomwhite)

    YARN-229. Remove old unused RM recovery code. (Bikas Saha via acmurthy) 

    YARN-187. Add hierarchical queues to the fair scheduler.
    (Sandy Ryza via tomwhite)

    YARN-72. NM should handle cleaning up containers when it shuts down.
    (Sandy Ryza via tomwhite)

    YARN-267. Fix fair scheduler web UI. (Sandy Ryza via tomwhite)

    YARN-264. y.s.rm.DelegationTokenRenewer attempts to renew token even 
    after removing an app. (kkambatl via tucu)

    YARN-271. Fair scheduler hits IllegalStateException trying to reserve
    different apps on same node. (Sandy Ryza via tomwhite)

    YARN-272. Fair scheduler log messages try to print objects without 
    overridden toString methods. (sandyr via tucu)

    YARN-278. Fair scheduler maxRunningApps config causes no apps to make
    progress. (sandyr via tucu)

    YARN-282. Fair scheduler web UI double counts Apps Submitted. 
    (sandyr via tucu)

    YARN-283. Fair scheduler fails to get queue info without root prefix. 
    (sandyr via tucu)

    YARN-192. Node update causes NPE in the fair scheduler.
    (Sandy Ryza via tomwhite)

    YARN-288. Fair scheduler queue doesn't accept any jobs when ACLs are
    configured. (Sandy Ryza via tomwhite)

    YARN-300. After YARN-271, fair scheduler can infinite loop and not
    schedule any application. (Sandy Ryza via tomwhite)

    YARN-301. Fair scheduler throws ConcurrentModificationException when
    iterating over app's priorities. (Sandy Ryza via tomwhite)

    YARN-217. Fix RMAdmin protocol description to make it work in secure mode
    also. (Devaraj K via vinodkv)

    YARN-253. Fixed container-launch to not fail when there are no local
    resources to localize. (Tom White via vinodkv)

    YARN-330. Fix flakey test: TestNodeManagerShutdown#testKillContainersOnShutdown.
    (Sandy Ryza via hitesh)
    
    YARN-335. Fair scheduler doesn't check whether rack needs containers
    before assigning to node. (Sandy Ryza via tomwhite)
    
    YARN-336. Fair scheduler FIFO scheduling within a queue only allows 1
    app at a time. (Sandy Ryza via tomwhite)

    YARN-135. Client tokens should be per app-attempt, and should be
    unregistered on App-finish. (vinodkv via sseth)

    YARN-302. Fair scheduler assignmultiple should default to false. (sandyr via tucu)
    
    YARN-372. Move InlineDispatcher from hadoop-yarn-server-resourcemanager to
    hadoop-yarn-common (sseth via hitesh)

    YARN-370. Fix SchedulerUtils to correctly round up the resource for
    containers. (Zhijie Shen via acmurthy) 

    YARN-355. Fixes a bug where RM app submission could jam under load.
    (Daryn Sharp via sseth)

Release 2.0.2-alpha - 2012-09-07 

  INCOMPATIBLE CHANGES

    YARN-9. Rename YARN_HOME to HADOOP_YARN_HOME. (vinodkv via acmurthy)

  NEW FEATURES

    YARN-1. Promote YARN to be a sub-project of Apache Hadoop. (acmurthy)

  IMPROVEMENTS

    YARN-29. Add a yarn-client module. (Vinod Kumar Vavilapalli via sseth)

    YARN-10. Fix DistributedShell module to not have a dependency on 
    hadoop-mapreduce-client-core. (Hitesh Shah via vinodkv)

    YARN-80. Add support for delaying rack-local containers in
    CapacityScheduler. (acmurthy) 

    YARN-137. Change the default YARN scheduler to be the CapacityScheduler. 
    (sseth via acmurthy) 

  OPTIMAZATIONS

  BUG FIXES

    YARN-12. Fix findbugs warnings in FairScheduler. (Junping Du via acmurthy) 

    YARN-22. Fix ContainerLogs to work if the log-dir is specified as a URI.
    (Mayank Bansal via sseth)

    YARN-37. Change TestRMAppTransitions to use the DrainDispatcher.
    (Mayank Bansal via sseth)

    YARN-79. Implement close on all clients to YARN so that RPC clients don't
    throw exceptions on shut-down. (Vinod Kumar Vavilapalli)

    YARN-42. Modify NM's non-aggregating logs' handler to stop properly so that
    NMs don't get NPEs on startup errors. (Devaraj K via vinodkv)

    YARN-15. Updated default classpath for YARN applications to reflect split of
    YARN into a sub-project. (Arun C Murthy via vinodkv)

    YARN-75. Modified ResourceManager's RMContainer to handle a valid RELEASE
    event at RUNNING state. (Siddharth Seth via vinodkv)

    MAPREDUCE-2374. "Text File Busy" errors launching MR tasks. (Andy Isaacson
    via atm)

    YARN-138. Ensure default values for minimum/maximum container sizes is
    sane. (harsh & sseth via acmurthy)

Release 0.23.8 - UNRELEASED

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

  OPTIMIZATIONS

  BUG FIXES

    YARN-363. Add webapps/proxy directory without which YARN proxy-server fails
    when started in stand-alone mode. (Kenji Kikushima via vinodkv)

    YARN-690. RM exits on token cancel/renew problems (daryn via bobby)

Release 0.23.7 - UNRELEASED

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

    YARN-133 Update web services docs for RM clusterMetrics (Ravi Prakash via
    kihwal)

    YARN-249. Capacity Scheduler web page should show list of active users per 
    queue like it used to (in 1.x) (Ravi Prakash via tgraves)

    YARN-236. RM should point tracking URL to RM web page when app fails to
    start (Jason Lowe via jeagles)

    YARN-269. Resource Manager not logging the health_check_script result when
    taking it out (Jason Lowe via kihwal)

    YARN-227. Application expiration difficult to debug for end-users
    (Jason Lowe via jeagles)
   
    YARN-443. allow OS scheduling priority of NM to be different than the 
    containers it launches (tgraves)

    YARN-468. coverage fix for org.apache.hadoop.yarn.server.webproxy.amfilter
    (Aleksey Gorshkov via bobby)

    YARN-200. yarn log does not output all needed information, and is in a
    binary format (Ravi Prakash via jlowe)

    YARN-525. make CS node-locality-delay refreshable (Thomas Graves via jlowe)

  OPTIMIZATIONS

    YARN-357. App submission should not be synchronized (daryn)

  BUG FIXES

    YARN-343. Capacity Scheduler maximum-capacity value -1 is invalid (Xuan 
    Gong via tgraves)

    YARN-364. AggregatedLogDeletionService can take too long to delete logs
    (jlowe)

    YARN-362. Unexpected extra results when using webUI table search (Ravi
    Prakash via jlowe)

    YARN-400. RM can return null application resource usage report leading to 
    NPE in client (Jason Lowe via tgraves)

    YARN-426. Failure to download a public resource prevents further downloads
    (Jason Lowe via bobby)

    YARN-448. Remove unnecessary hflush from log aggregation (Kihwal Lee via
    bobby)

    YARN-345. Many InvalidStateTransitonException errors for ApplicationImpl
    in Node Manager (Robert Parker via jlowe)

    YARN-109. .tmp file is not deleted for localized archives (Mayank Bansal 
    via bobby)

    YARN-460. CS user left in list of active users for the queue even when 
    application finished (tgraves)

Release 0.23.6 - UNRELEASED

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

    YARN-285. Added a temporary plugin interface for RM to be able to redirect
    to JobHistory server for apps that it no longer tracks. (Derek Dagit via
    vinodkv)

  OPTIMIZATIONS

  BUG FIXES

    YARN-188. Coverage fixing for CapacityScheduler (Aleksey Gorshkov via
    bobby)

    YARN-214. RMContainerImpl does not handle event EXPIRE at state RUNNING
    (jeagles via bobby)

    YARN-151. Browser thinks RM main page JS is taking too long 
    (Ravi Prakash via bobby)

    YARN-204. test coverage for org.apache.hadoop.tools (Aleksey Gorshkov via
    bobby)

    YARN-251. Proxy URI generation fails for blank tracking URIs (Tom White
    via jlowe)

    YARN-258. RM web page UI shows Invalid Date for start and finish times
    (Ravi Prakash via jlowe)

    YARN-266. RM and JHS Web UIs are blank because AppsBlock is not escaping
    string properly (Ravi Prakash via jlowe)

    YARN-280. RM does not reject app submission with invalid tokens 
    (Daryn Sharp via tgraves)

    YARN-225. Proxy Link in RM UI thows NPE in Secure mode 
    (Devaraj K via bobby)

    YARN-293. Node Manager leaks LocalizerRunner object for every Container
    (Robert Joseph Evans via jlowe)

    YARN-50. Implement renewal / cancellation of Delegation Tokens
    (Siddharth Seth via tgraves)

    YARN-320. RM should always be able to renew its own tokens. 
    (Daryn Sharp via sseth)

    YARN-325. RM CapacityScheduler can deadlock when getQueueInfo() is 
    called and a container is completing (Arun C Murthy via tgraves)

    YARN-334. Maven RAT plugin is not checking all source files (tgraves)

    YARN-354. WebAppProxyServer exits immediately after startup (Liang Xie via
    jlowe)

Release 0.23.5 - 2012-11-28

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

    YARN-161. Fix multiple compiler warnings for unchecked operations in YARN
    common. (Chris Nauroth via vinodkv)

    YARN-43. Fix TestResourceTrackerService to not depend on test order and thus
    pass on JDK7. (Thomas Graves via vinodkv)

    YARN-32. Fix TestApplicationTokens to not depend on test order and thus pass
    on JDK7. (vinodkv)

    YARN-186. Coverage fixing LinuxContainerExecutor (Aleksey Gorshkov via
    bobby)

    YARN-216. Remove jquery theming support. (Robert Joseph Evans via jlowe)

  OPTIMIZATIONS

  BUG FIXES

    YARN-163. Retrieving container log via NM webapp can hang with multibyte
    characters in log (jlowe via bobby)

    YARN-174. Modify NodeManager to pass the user's configuration even when
    rebooting. (vinodkv)

    YARN-177. CapacityScheduler - adding a queue while the RM is running has 
    wacky results (acmurthy vai tgraves)

    YARN-178. Fix custom ProcessTree instance creation (Radim Kolar via bobby)

    YARN-180. Capacity scheduler - containers that get reserved create 
    container token to early (acmurthy and bobby)

    YARN-139. Interrupted Exception within AsyncDispatcher leads to user
    confusion. (Vinod Kumar Vavilapalli via jlowe)

    YARN-165. RM should point tracking URL to RM web page for app when AM fails
    (jlowe via bobby)

    YARN-159. RM web ui applications page should be sorted to display last app
    first (tgraves via bobby)

    YARN-166. capacity scheduler doesn't allow capacity < 1.0 (tgraves via
    bobby)

    YARN-189. Fixed a deadlock between RM's ApplicationMasterService and the
    dispatcher. (Thomas Graves via vinodkv)

    YARN-202. Log Aggregation generates a storm of fsync() for namenode 
    (Kihwal Lee via bobby)

    YARN-201. Fix CapacityScheduler to be less conservative for starved 
    off-switch requests. (jlowe via acmurthy) 

    YARN-206. TestApplicationCleanup.testContainerCleanup occasionally fails.
    (jlowe via jeagles)

    YARN-212. NM state machine ignores an APPLICATION_CONTAINER_FINISHED event
    when it shouldn't (Nathan Roberts via jlowe)

    YARN-219. NM should aggregate logs when application finishes. (bobby)

Release 0.23.4

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

    Change package of YarnClient to org.apache.hadoop. (Bikas Saha via vinodkv)

    YARN-108. FSDownload can create cache directories with the wrong
    permissions (Jason Lowe via bobby)

  OPTIMIZATIONS

  BUG FIXES

    YARN-88. DefaultContainerExecutor can fail to set proper permissions.
    (Jason Lowe via sseth)

    YARN-106. Nodemanager needs to set permissions of local directories (jlowe
    via bobby)

Release 0.23.3

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

  OPTIMAZATIONS

  BUG FIXES

    YARN-14. Symlinks to peer distributed cache files no longer work 
    (Jason Lowe via bobby) 

    YARN-25. remove old aggregated logs  (Robert Evans via tgraves)

    YARN-27. Failed refreshQueues due to misconfiguration prevents further 
    refreshing of queues (Arun Murthy via tgraves)

    YARN-58. NM leaks filesystems (Jason Lowe via jeagles)
    
    YARN-39. RM-NM secret-keys should be randomly generated and rolled every
    so often. (vinodkv and sseth via sseth)

    YARN-31. Fix TestDelegationTokenRenewer to not depend on test order so as to
    pass tests on jdk7. (Thomas Graves via vinodkv)

    YARN-63. RMNodeImpl is missing valid transitions from the UNHEALTHY state
    (Jason Lowe via bobby)

    YARN-60. Fixed a bug in ResourceManager which causes all NMs to get NPEs and
    thus causes all containers to be rejected. (vinodkv)

    YARN-66. aggregated logs permissions not set properly (tgraves via bobby)

    YARN-68. NodeManager will refuse to shutdown indefinitely due to container
    log aggregation (daryn via bobby)

    YARN-87. NM ResourceLocalizationService does not set permissions of local 
    cache directories (Jason Lowe via tgraves)