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Posted to common-commits@hadoop.apache.org by sj...@apache.org on 2016/10/11 04:05:31 UTC
hadoop git commit: Updated the release notes for 2.6.5 post-release
(the web site will use the correct release notes).
Repository: hadoop
Updated Branches:
refs/heads/branch-2.6.5 e8c9fe0b4 -> 09ba74e35
Updated the release notes for 2.6.5 post-release (the web site will use the correct release notes).
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/09ba74e3
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/09ba74e3
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/09ba74e3
Branch: refs/heads/branch-2.6.5
Commit: 09ba74e3502fb9f42d20498f8c909bff0c782327
Parents: e8c9fe0
Author: Sangjin Lee <sj...@apache.org>
Authored: Mon Oct 10 21:05:16 2016 -0700
Committer: Sangjin Lee <sj...@apache.org>
Committed: Mon Oct 10 21:05:16 2016 -0700
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.../src/main/docs/releasenotes.html | 820 ++++++-------------
1 file changed, 258 insertions(+), 562 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/09ba74e3/hadoop-common-project/hadoop-common/src/main/docs/releasenotes.html
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diff --git a/hadoop-common-project/hadoop-common/src/main/docs/releasenotes.html b/hadoop-common-project/hadoop-common/src/main/docs/releasenotes.html
index 29da383..f23d12e 100644
--- a/hadoop-common-project/hadoop-common/src/main/docs/releasenotes.html
+++ b/hadoop-common-project/hadoop-common/src/main/docs/releasenotes.html
@@ -1,5 +1,5 @@
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
-<title>Hadoop 2.6.1 Release Notes</title>
+<title>Hadoop 2.6.5 Release Notes</title>
<STYLE type="text/css">
H1 {font-family: sans-serif}
H2 {font-family: sans-serif; margin-left: 7mm}
@@ -7,632 +7,328 @@
</STYLE>
</head>
<body>
-<h1>Hadoop 2.6.1 Release Notes</h1>
+<h1>Hadoop 2.6.5 Release Notes</h1>
These release notes include new developer and user-facing incompatibilities, features, and major improvements.
<a name="changes"/>
-<h2>Changes since Hadoop 2.6.0</h2>
+<h2>Changes since Hadoop 2.6.4</h2>
<ul>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-4047">YARN-4047</a>.
- Major bug reported by Jason Lowe and fixed by Jason Lowe (resourcemanager)<br>
- <b>ClientRMService getApplications has high scheduler lock contention</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3999">YARN-3999</a>.
- Major bug reported by Jian He and fixed by Jian He <br>
- <b>RM hangs on draining events</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3990">YARN-3990</a>.
- Critical bug reported by Rohith Sharma K S and fixed by Bibin A Chundatt (resourcemanager)<br>
- <b>AsyncDispatcher may overloaded with RMAppNodeUpdateEvent when Node is connected/disconnected</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3978">YARN-3978</a>.
- Major improvement reported by Eric Payne and fixed by Eric Payne (timelineserver , yarn)<br>
- <b>Configurably turn off the saving of container info in Generic AHS</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3850">YARN-3850</a>.
- Blocker bug reported by Varun Saxena and fixed by Varun Saxena (log-aggregation , nodemanager)<br>
- <b>NM fails to read files from full disks which can lead to container logs being lost and other issues</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3832">YARN-3832</a>.
- Critical bug reported by Ranga Swamy and fixed by Brahma Reddy Battula (nodemanager)<br>
- <b>Resource Localization fails on a cluster due to existing cache directories</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3733">YARN-3733</a>.
- Blocker bug reported by Bibin A Chundatt and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>Fix DominantRC#compare() does not work as expected if cluster resource is empty</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3725">YARN-3725</a>.
- Blocker bug reported by Zhijie Shen and fixed by Zhijie Shen (resourcemanager , timelineserver)<br>
- <b>App submission via REST API is broken in secure mode due to Timeline DT service address is empty</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3700">YARN-3700</a>.
- Major sub-task reported by Xuan Gong and fixed by Xuan Gong (resourcemanager , webapp , yarn)<br>
- <b>ATS Web Performance issue at load time when large number of jobs</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3585">YARN-3585</a>.
- Critical bug reported by Peng Zhang and fixed by Rohith Sharma K S <br>
- <b>NodeManager cannot exit on SHUTDOWN event triggered and NM recovery is enabled</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3526">YARN-3526</a>.
- Major bug reported by Weiwei Yang and fixed by Weiwei Yang (resourcemanager , webapp)<br>
- <b>ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3493">YARN-3493</a>.
- Critical bug reported by Sumana Sathish and fixed by Jian He (yarn)<br>
- <b>RM fails to come up with error "Failed to load/recover state" when mem settings are changed</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3487">YARN-3487</a>.
- Critical sub-task reported by Jason Lowe and fixed by Jason Lowe (capacityscheduler)<br>
- <b>CapacityScheduler scheduler lock obtained unnecessarily when calling getQueue</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3464">YARN-3464</a>.
- Critical bug reported by zhihai xu and fixed by zhihai xu (nodemanager)<br>
- <b>Race condition in LocalizerRunner kills localizer before localizing all resources</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3393">YARN-3393</a>.
- Critical bug reported by Zhijie Shen and fixed by Zhijie Shen (timelineserver)<br>
- <b>Getting application(s) goes wrong when app finishes before starting the attempt</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3369">YARN-3369</a>.
- Blocker bug reported by Giovanni Matteo Fumarola and fixed by Brahma Reddy Battula (resourcemanager)<br>
- <b>Missing NullPointer check in AppSchedulingInfo causes RM to die </b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3287">YARN-3287</a>.
- Major bug reported by Jonathan Eagles and fixed by Daryn Sharp <br>
- <b>TimelineClient kerberos authentication failure uses wrong login context.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3267">YARN-3267</a>.
- Major bug reported by Prakash Ramachandran and fixed by Chang Li <br>
- <b>Timelineserver applies the ACL rules after applying the limit on the number of records</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3251">YARN-3251</a>.
- Blocker bug reported by Jason Lowe and fixed by Craig Welch <br>
- <b>Fix CapacityScheduler deadlock when computing absolute max avail capacity (short term fix for 2.6.1)</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3249">YARN-3249</a>.
- Minor improvement reported by Ryu Kobayashi and fixed by Ryu Kobayashi (resourcemanager)<br>
- <b>Add a "kill application" button to Resource Manager's Web UI</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3242">YARN-3242</a>.
- Critical bug reported by zhihai xu and fixed by zhihai xu (resourcemanager)<br>
- <b>Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving events for old client</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3239">YARN-3239</a>.
- Major bug reported by Hitesh Shah and fixed by Jian He <br>
- <b>WebAppProxy does not support a final tracking url which has query fragments and params </b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3238">YARN-3238</a>.
- Blocker bug reported by Jason Lowe and fixed by Jason Lowe <br>
- <b>Connection timeouts to nodemanagers are retried at multiple levels</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3231">YARN-3231</a>.
- Critical bug reported by Siqi Li and fixed by Siqi Li <br>
- <b>FairScheduler: Changing queueMaxRunningApps interferes with pending jobs</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3230">YARN-3230</a>.
- Major improvement reported by Jian He and fixed by Jian He <br>
- <b>Clarify application states on the web UI</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3227">YARN-3227</a>.
- Critical bug reported by Jonathan Eagles and fixed by Zhijie Shen <br>
- <b>Timeline renew delegation token fails when RM user's TGT is expired</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3222">YARN-3222</a>.
- Critical bug reported by Rohith Sharma K S and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>RMNodeImpl#ReconnectNodeTransition should send scheduler events in sequential order</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3207">YARN-3207</a>.
- Major bug reported by Prakash Ramachandran and fixed by Zhijie Shen (timelineserver)<br>
- <b>secondary filter matches entites which do not have the key being filtered for.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3124">YARN-3124</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan (api , client , resourcemanager)<br>
- <b>Capacity Scheduler LeafQueue/ParentQueue should use QueueCapacities to track capacities-by-label</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3103">YARN-3103</a>.
- Blocker bug reported by Jason Lowe and fixed by Jason Lowe (client)<br>
- <b>AMRMClientImpl does not update AMRM token properly</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3099">YARN-3099</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan (api , client , resourcemanager)<br>
- <b>Capacity Scheduler LeafQueue/ParentQueue should use ResourceUsage to track used-resources-by-label.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3098">YARN-3098</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan (capacityscheduler)<br>
- <b>Create common QueueCapacities class in Capacity Scheduler to track capacities-by-labels of queues</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3094">YARN-3094</a>.
- Major bug reported by Jun Gong and fixed by Jun Gong (resourcemanager)<br>
- <b>reset timer for liveness monitors after RM recovery</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3092">YARN-3092</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan (api , client , resourcemanager)<br>
- <b>Create common ResourceUsage class to track labeled resource usages in Capacity Scheduler</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3055">YARN-3055</a>.
- Blocker bug reported by Yi Liu and fixed by Daryn Sharp (security)<br>
- <b>The token is not renewed properly if it's shared by jobs (oozie) in DelegationTokenRenewer</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3024">YARN-3024</a>.
- Major bug reported by Chengbing Liu and fixed by Chengbing Liu (nodemanager)<br>
- <b>LocalizerRunner should give DIE action when all resources are localized</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-3011">YARN-3011</a>.
- Major sub-task reported by Wang Hao and fixed by Varun Saxena (nodemanager)<br>
- <b>NM dies because of the failure of resource localization</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2997">YARN-2997</a>.
- Major bug reported by Chengbing Liu and fixed by Chengbing Liu (nodemanager)<br>
- <b>NM keeps sending already-sent completed containers to RM until containers are removed from context</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2992">YARN-2992</a>.
- Blocker bug reported by Karthik Kambatla and fixed by Karthik Kambatla (resourcemanager)<br>
- <b>ZKRMStateStore crashes due to session expiry</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2978">YARN-2978</a>.
- Critical bug reported by Jason Tufo and fixed by Varun Saxena <br>
- <b>ResourceManager crashes with NPE while getting queue info</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2964">YARN-2964</a>.
- Blocker bug reported by Daryn Sharp and fixed by Jian He (resourcemanager)<br>
- <b>RM prematurely cancels tokens for jobs that submit jobs (oozie)</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2952">YARN-2952</a>.
- Major bug reported by Jian He and fixed by Rohith Sharma K S <br>
- <b>Incorrect version check in RMStateStore</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2922">YARN-2922</a>.
- Major bug reported by Jason Tufo and fixed by Rohith Sharma K S (capacityscheduler , resourcemanager , scheduler)<br>
- <b>ConcurrentModificationException in CapacityScheduler's LeafQueue</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2920">YARN-2920</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan <br>
- <b>CapacityScheduler should be notified when labels on nodes changed</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5483">YARN-5483</a>.
+ Major improvement reported by sandflee and fixed by sandflee <br>
+ <b>Optimize RMAppAttempt#pullJustFinishedContainers</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2918">YARN-2918</a>.
- Major sub-task reported by Rohith Sharma K S and fixed by Wangda Tan (resourcemanager)<br>
- <b>Don't fail RM if queue's configured labels are not existed in cluster-node-labels</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5462">YARN-5462</a>.
+ Major bug reported by Eric Badger and fixed by Eric Badger <br>
+ <b>TestNodeStatusUpdater.testNodeStatusUpdaterRetryAndNMShutdown fails intermittently</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2917">YARN-2917</a>.
- Critical bug reported by Rohith Sharma K S and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>Potential deadlock in AsyncDispatcher when system.exit called in AsyncDispatcher#dispatch and AsyscDispatcher#serviceStop from shutdown hook</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5353">YARN-5353</a>.
+ Critical bug reported by Jason Lowe and fixed by Jason Lowe (resourcemanager)<br>
+ <b>ResourceManager can leak delegation tokens when they are shared across apps</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2910">YARN-2910</a>.
- Major bug reported by Wilfred Spiegelenburg and fixed by Wilfred Spiegelenburg (fairscheduler)<br>
- <b>FSLeafQueue can throw ConcurrentModificationException</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2906">YARN-2906</a>.
- Major bug reported by Jason Lowe and fixed by Jason Lowe (capacityscheduler)<br>
- <b>CapacitySchedulerPage shows HTML tags for a queue's Active Users</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2905">YARN-2905</a>.
- Blocker bug reported by Jason Lowe and fixed by Varun Saxena <br>
- <b>AggregatedLogsBlock page can infinitely loop if the aggregated log file is corrupted</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2900">YARN-2900</a>.
- Major sub-task reported by Jonathan Eagles and fixed by Mit Desai (timelineserver)<br>
- <b>Application (Attempt and Container) Not Found in AHS results in Internal Server Error (500)</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2894">YARN-2894</a>.
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5262">YARN-5262</a>.
Major bug reported by Rohith Sharma K S and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>When ACL's are enabled, if RM switches then application can not be viewed from web.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2890">YARN-2890</a>.
- Major bug reported by Mit Desai and fixed by Mit Desai <br>
- <b>MiniYarnCluster should turn on timeline service if configured to do so</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2874">YARN-2874</a>.
- Blocker bug reported by Naganarasimha G R and fixed by Naganarasimha G R (resourcemanager)<br>
- <b>Dead lock in "DelegationTokenRenewer" which blocks RM to execute any further apps</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2865">YARN-2865</a>.
- Critical bug reported by Rohith Sharma K S and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>Application recovery continuously fails with "Application with id already present. Cannot duplicate"</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2856">YARN-2856</a>.
- Critical bug reported by Rohith Sharma K S and fixed by Rohith Sharma K S (resourcemanager)<br>
- <b>Application recovery throw InvalidStateTransitonException: Invalid event: ATTEMPT_KILLED at ACCEPTED</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2816">YARN-2816</a>.
- Major bug reported by zhihai xu and fixed by zhihai xu (nodemanager)<br>
- <b>NM fail to start with NPE during container recovery</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2766">YARN-2766</a>.
- Major sub-task reported by Robert Kanter and fixed by Robert Kanter (timelineserver)<br>
- <b> ApplicationHistoryManager is expected to return a sorted list of apps/attempts/containers</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2694">YARN-2694</a>.
- Major sub-task reported by Wangda Tan and fixed by Wangda Tan (capacityscheduler , resourcemanager)<br>
- <b>Ensure only single node labels specified in resource request / host, and node label expression only specified when resourceName=ANY</b><br>
+ <b>Optimize sending RMNodeFinishedContainersPulledByAMEvent for every AM heartbeat</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2637">YARN-2637</a>.
- Critical bug reported by Wangda Tan and fixed by Craig Welch (resourcemanager)<br>
- <b>maximum-am-resource-percent could be respected for both LeafQueue/User when trying to activate applications.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5206">YARN-5206</a>.
+ Minor bug reported by Steve Loughran and fixed by Steve Loughran (client , security)<br>
+ <b>RegistrySecurity includes id:pass in exception text if considered invalid</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2414">YARN-2414</a>.
- Major bug reported by Zhijie Shen and fixed by Wangda Tan (webapp)<br>
- <b>RM web UI: app page will crash if app is failed before any attempt has been created</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2340">YARN-2340</a>.
- Critical bug reported by Nishan Shetty and fixed by Rohith Sharma K S (resourcemanager , scheduler)<br>
- <b>NPE thrown when RM restart after queue is STOPPED. There after RM can not recovery application's and remain in standby</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2301">YARN-2301</a>.
- Major improvement reported by Jian He and fixed by Naganarasimha G R <br>
- <b>Improve yarn container command</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-2246">YARN-2246</a>.
- Major bug reported by Devaraj K and fixed by Devaraj K (webapp)<br>
- <b>Job History Link in RM UI is redirecting to the URL which contains Job Id twice</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-1984">YARN-1984</a>.
- Major sub-task reported by Jason Lowe and fixed by Varun Saxena <br>
- <b>LeveldbTimelineStore does not handle db exceptions properly</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/YARN-1809">YARN-1809</a>.
- Major sub-task reported by Zhijie Shen and fixed by Xuan Gong <br>
- <b>Synchronize RM and Generic History Service Web-UIs</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6361">MAPREDUCE-6361</a>.
- Critical bug reported by Junping Du and fixed by Junping Du <br>
- <b>NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread and copyFailed() in another thread on the same host</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6324">MAPREDUCE-6324</a>.
- Blocker bug reported by Jason Lowe and fixed by Jason Lowe (mr-am)<br>
- <b>Uber jobs fail to update AMRM token when it rolls over</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6303">MAPREDUCE-6303</a>.
- Blocker bug reported by Jason Lowe and fixed by Jason Lowe <br>
- <b>Read timeout when retrying a fetch error can be fatal to a reducer</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6300">MAPREDUCE-6300</a>.
- Minor bug reported by Siqi Li and fixed by Siqi Li <br>
- <b>Task list sort by task id broken</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5197">YARN-5197</a>.
+ Major bug reported by Jason Lowe and fixed by Jason Lowe (resourcemanager)<br>
+ <b>RM leaks containers if running container disappears from node update</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6267">MAPREDUCE-6267</a>.
- Minor improvement reported by Chris Trezzo and fixed by Chris Trezzo <br>
- <b>Refactor JobSubmitter#copyAndConfigureFiles into it's own class</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-5009">YARN-5009</a>.
+ Major bug reported by Jason Lowe and fixed by Jason Lowe (nodemanager)<br>
+ <b>NMLeveldbStateStoreService database can grow substantially leading to longer recovery times</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6238">MAPREDUCE-6238</a>.
- Critical bug reported by zhihai xu and fixed by zhihai xu (mrv2)<br>
- <b>MR2 can't run local jobs with -libjars command options which is a regression from MR1</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4794">YARN-4794</a>.
+ Critical bug reported by Sumana Sathish and fixed by Jian He <br>
+ <b>Deadlock in NMClientImpl</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6237">MAPREDUCE-6237</a>.
- Major bug reported by Kannan Rajah and fixed by Kannan Rajah (mrv2)<br>
- <b>Multiple mappers with DBInputFormat don't work because of reusing conections</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4785">YARN-4785</a>.
+ Major bug reported by Jayesh and fixed by Varun Vasudev (webapp)<br>
+ <b>inconsistent value type of the "type" field for LeafQueueInfo in response of RM REST API - cluster/scheduler</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6230">MAPREDUCE-6230</a>.
- Blocker bug reported by Jason Lowe and fixed by Jason Lowe (mr-am)<br>
- <b>MR AM does not survive RM restart if RM activated a new AMRM secret key</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4773">YARN-4773</a>.
+ Minor bug reported by Jason Lowe and fixed by Jun Gong (nodemanager)<br>
+ <b>Log aggregation performs extraneous filesystem operations when rolling log aggregation is disabled</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6166">MAPREDUCE-6166</a>.
- Major bug reported by Eric Payne and fixed by Eric Payne (mrv2)<br>
- <b>Reducers do not validate checksum of map outputs when fetching directly to disk</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4761">YARN-4761</a>.
+ Major bug reported by Sangjin Lee and fixed by Sangjin Lee (fairscheduler)<br>
+ <b>NMs reconnecting with changed capabilities can lead to wrong cluster resource calculations on fair scheduler</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5649">MAPREDUCE-5649</a>.
- Major bug reported by stanley shi and fixed by Gera Shegalov (mrv2)<br>
- <b>Reduce cannot use more than 2G memory for the final merge</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4722">YARN-4722</a>.
+ Major bug reported by Jason Lowe and fixed by Jason Lowe <br>
+ <b>AsyncDispatcher logs redundant event queue sizes</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8863">HDFS-8863</a>.
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4690">YARN-4690</a>.
+ Major improvement reported by Ming Ma and fixed by Ming Ma <br>
+ <b>Skip object allocation in FSAppAttempt#getResourceUsage when possible</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4573">YARN-4573</a>.
+ Major sub-task reported by Takashi Ohnishi and fixed by Takashi Ohnishi (resourcemanager , test)<br>
+ <b>TestRMAppTransitions.testAppRunningKill and testAppKilledKilled fail on trunk</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4459">YARN-4459</a>.
+ Major bug reported by Jun Gong and fixed by Jun Gong (nodemanager)<br>
+ <b>container-executor should only kill process groups</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-4393">YARN-4393</a>.
+ Major sub-task reported by Varun Saxena and fixed by Varun Saxena (test)<br>
+ <b>TestResourceLocalizationService#testFailedDirsResourceRelease fails intermittently</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/YARN-2046">YARN-2046</a>.
+ Major bug reported by Jason Lowe and fixed by Ming Ma (nodemanager)<br>
+ <b>Out of band heartbeats are sent only on container kill and possibly too early</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6689">MAPREDUCE-6689</a>.
+ Blocker bug reported by Wangda Tan and fixed by Wangda Tan <br>
+ <b>MapReduce job can infinitely increase number of reducer resource requests</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6656">MAPREDUCE-6656</a>.
+ Blocker bug reported by J.Andreina and fixed by J.Andreina <br>
+ <b>[NNBench] OP_DELETE operation isn't working after MAPREDUCE-6363</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6637">MAPREDUCE-6637</a>.
+ Major bug reported by Brahma Reddy Battula and fixed by Brahma Reddy Battula (test)<br>
+ <b>Testcase Failure : TestFileInputFormat.testSplitLocationInfo</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6635">MAPREDUCE-6635</a>.
+ Critical bug reported by Sergey Shelukhin and fixed by Junping Du <br>
+ <b>Unsafe long to int conversion in UncompressedSplitLineReader and IndexOutOfBoundsException</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6622">MAPREDUCE-6622</a>.
+ Critical improvement reported by Ray Chiang and fixed by Ray Chiang (jobhistoryserver)<br>
+ <b>Add capability to set JHS job cache to a task-based limit</b><br>
+ <blockquote>Two recommendations for the mapreduce.jobhistory.loadedtasks.cache.size property:
+1) For every 100k of cache size, set the heap size of the Job History Server to 1.2GB. For example, mapreduce.jobhistory.loadedtasks.cache.size=500000, heap size=6GB.
+2) Make sure that the cache size is larger than the number of tasks required for the largest job run on the cluster. It might be a good idea to set the value slightly higher (say, 20%) in order to allow for job size growth.</blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6558">MAPREDUCE-6558</a>.
+ Major bug reported by Wilfred Spiegelenburg and fixed by Wilfred Spiegelenburg (mrv1 , mrv2)<br>
+ <b>multibyte delimiters with compressed input files generate duplicate records</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6514">MAPREDUCE-6514</a>.
+ Blocker bug reported by Varun Saxena and fixed by Varun Saxena (applicationmaster)<br>
+ <b>Job hangs as ask is not updated after ramping down of all reducers</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6413">MAPREDUCE-6413</a>.
+ Major bug reported by Jason Lowe and fixed by zhihai xu (test)<br>
+ <b>TestLocalJobSubmission is failing with unknown host</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6302">MAPREDUCE-6302</a>.
+ Critical bug reported by mai shurong and fixed by Karthik Kambatla <br>
+ <b>Preempt reducers after a configurable timeout irrespective of headroom</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-6191">MAPREDUCE-6191</a>.
+ Minor test reported by sam liu and fixed by sam liu (test)<br>
+ <b>TestJavaSerialization fails with getting incorrect MR job result</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5817">MAPREDUCE-5817</a>.
+ Major bug reported by Sangjin Lee and fixed by Sangjin Lee (applicationmaster)<br>
+ <b>Mappers get rescheduled on node transition even after all reducers are completed</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10870">HDFS-10870</a>.
+ Trivial bug reported by John Zhuge and fixed by John Zhuge (documentation)<br>
+ <b>Wrong dfs.namenode.acls.enabled default in HdfsPermissionsGuide.apt.vm</b><br>
+ <blockquote></blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10763">HDFS-10763</a>.
Critical bug reported by Kihwal Lee and fixed by Kihwal Lee <br>
- <b>The remaining space check in BlockPlacementPolicyDefault is flawed</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8846">HDFS-8846</a>.
- Major bug reported by Zhe Zhang and fixed by Zhe Zhang (namenode)<br>
- <b>Add a unit test for INotify functionality across a layout version upgrade</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8486">HDFS-8486</a>.
- Blocker bug reported by Daryn Sharp and fixed by Daryn Sharp (datanode)<br>
- <b>DN startup may cause severe data loss</b><br>
- <blockquote>Public service notice:
-- Every restart of a 2.6.x or 2.7.0 DN incurs a risk of unwanted block deletion.
-- Apply this patch if you are running a pre-2.7.1 release.</blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8480">HDFS-8480</a>.
- Critical bug reported by Zhe Zhang and fixed by Zhe Zhang <br>
- <b>Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8431">HDFS-8431</a>.
- Critical bug reported by Sumana Sathish and fixed by Anu Engineer (HDFS)<br>
- <b>hdfs crypto class not found in Windows</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8404">HDFS-8404</a>.
- Major bug reported by Nathan Roberts and fixed by Nathan Roberts (namenode)<br>
- <b>Pending block replication can get stuck using older genstamp</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8384">HDFS-8384</a>.
- Minor improvement reported by Tsz Wo Nicholas Sze and fixed by Jing Zhao (namenode)<br>
- <b>Allow NN to startup if there are files having a lease but are not under construction</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8270">HDFS-8270</a>.
- Major bug reported by Andrey Stepachev and fixed by J.Andreina (hdfs-client)<br>
- <b>create() always retried with hardcoded timeout when file already exists with open lease</b><br>
- <blockquote>Proxy level retries will not be done on AlreadyBeingCreatedExeption for create() op.</blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8245">HDFS-8245</a>.
- Major bug reported by Rushabh S Shah and fixed by Rushabh S Shah <br>
- <b>Standby namenode doesn't process DELETED_BLOCK if the add block request is in edit log.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8219">HDFS-8219</a>.
- Major bug reported by Peter Shi and fixed by Surendra Singh Lilhore <br>
- <b>setStoragePolicy with folder behavior is different after cluster restart</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8127">HDFS-8127</a>.
- Blocker bug reported by Jing Zhao and fixed by Jing Zhao (ha)<br>
- <b>NameNode Failover during HA upgrade can cause DataNode to finalize upgrade</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8072">HDFS-8072</a>.
- Major bug reported by Arpit Agarwal and fixed by Arpit Agarwal (datanode)<br>
- <b>Reserved RBW space is not released if client terminates while writing block</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8070">HDFS-8070</a>.
- Blocker bug reported by Gopal V and fixed by Colin Patrick McCabe (caching)<br>
- <b>Pre-HDFS-7915 DFSClient cannot use short circuit on post-HDFS-7915 DataNode</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-8046">HDFS-8046</a>.
- Major bug reported by Kihwal Lee and fixed by Kihwal Lee <br>
- <b>Allow better control of getContentSummary</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7999">HDFS-7999</a>.
- Major bug reported by zhouyingchao and fixed by zhouyingchao <br>
- <b>FsDatasetImpl#createTemporary sometimes holds the FSDatasetImpl lock for a very long time</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7980">HDFS-7980</a>.
- Major bug reported by Hui Zheng and fixed by Walter Su <br>
- <b>Incremental BlockReport will dramatically slow down the startup of a namenode</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7960">HDFS-7960</a>.
- Critical bug reported by Lei (Eddy) Xu and fixed by Colin Patrick McCabe <br>
- <b>The full block report should prune zombie storages even if they're not empty</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7930">HDFS-7930</a>.
- Blocker bug reported by Konstantin Shvachko and fixed by Yi Liu (namenode)<br>
- <b>commitBlockSynchronization() does not remove locations</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7929">HDFS-7929</a>.
- Major bug reported by Zhe Zhang and fixed by Zhe Zhang <br>
- <b>inotify unable fetch pre-upgrade edit log segments once upgrade starts</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7915">HDFS-7915</a>.
- Major bug reported by Colin Patrick McCabe and fixed by Colin Patrick McCabe <br>
- <b>The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell the DFSClient about it because of a network error</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7894">HDFS-7894</a>.
- Critical bug reported by Kihwal Lee and fixed by Brahma Reddy Battula <br>
- <b>Rolling upgrade readiness is not updated in jmx until query command is issued.</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7885">HDFS-7885</a>.
- Critical bug reported by vitthal (Suhas) Gogate and fixed by Tsz Wo Nicholas Sze (datanode)<br>
- <b>Datanode should not trust the generation stamp provided by client</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7884">HDFS-7884</a>.
- Blocker bug reported by Tsz Wo Nicholas Sze and fixed by Brahma Reddy Battula (datanode)<br>
- <b>NullPointerException in BlockSender</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7871">HDFS-7871</a>.
- Critical bug reported by Jing Zhao and fixed by Jing Zhao <br>
- <b>NameNodeEditLogRoller can keep printing "Swallowing exception" message</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7830">HDFS-7830</a>.
- Major bug reported by Lei (Eddy) Xu and fixed by Lei (Eddy) Xu (datanode)<br>
- <b>DataNode does not release the volume lock when adding a volume fails.</b><br>
+ <b>Open files can leak permanently due to inconsistent lease update</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7788">HDFS-7788</a>.
- Blocker bug reported by Kihwal Lee and fixed by Rushabh S Shah <br>
- <b>Post-2.6 namenode may not start up with an image containing inodes created with an old release.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10653">HDFS-10653</a>.
+ Major sub-task reported by Daryn Sharp and fixed by Daryn Sharp (hdfs)<br>
+ <b>Optimize conversion from path string to components</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7763">HDFS-7763</a>.
- Major bug reported by Liang Xie and fixed by Liang Xie (ha)<br>
- <b>fix zkfc hung issue due to not catching exception in a corner case</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10544">HDFS-10544</a>.
+ Major bug reported by Zhe Zhang and fixed by Zhe Zhang (balancer & mover , ha)<br>
+ <b>Balancer doesn't work with IPFailoverProxyProvider</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7742">HDFS-7742</a>.
- Major bug reported by Nathan Roberts and fixed by Nathan Roberts (namenode)<br>
- <b>favoring decommissioning node for replication can cause a block to stay underreplicated for long periods</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10458">HDFS-10458</a>.
+ Major bug reported by Zhe Zhang and fixed by Zhe Zhang (encryption , namenode)<br>
+ <b>getFileEncryptionInfo should return quickly for non-encrypted cluster</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7733">HDFS-7733</a>.
- Major bug reported by Arpit Agarwal and fixed by Arpit Agarwal (nfs)<br>
- <b>NFS: readdir/readdirplus return null directory attribute on failure</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10377">HDFS-10377</a>.
+ Major improvement reported by Konstantin Shvachko and fixed by Yiqun Lin (logging , namenode)<br>
+ <b>CacheReplicationMonitor shutdown log message should use INFO level.</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7714">HDFS-7714</a>.
- Major bug reported by Chris Nauroth and fixed by Vinayakumar B (datanode)<br>
- <b>Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10271">HDFS-10271</a>.
+ Critical bug reported by Brahma Reddy Battula and fixed by Brahma Reddy Battula <br>
+ <b>Extra bytes are getting released from reservedSpace for append</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7707">HDFS-7707</a>.
- Major bug reported by Yongjun Zhang and fixed by Yongjun Zhang (namenode)<br>
- <b>Edit log corruption due to delayed block removal again</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10264">HDFS-10264</a>.
+ Major improvement reported by Konstantin Shvachko and fixed by Xiaobing Zhou (namenode)<br>
+ <b>Logging improvements in FSImageFormatProtobuf.Saver</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7610">HDFS-7610</a>.
- Major bug reported by Lei (Eddy) Xu and fixed by Lei (Eddy) Xu (datanode)<br>
- <b>Fix removal of dynamically added DN volumes</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7609">HDFS-7609</a>.
- Critical bug reported by Carrey Zhan and fixed by Ming Ma (namenode)<br>
- <b>Avoid retry cache collision when Standby NameNode loading edits</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7596">HDFS-7596</a>.
- Major bug reported by Arpit Agarwal and fixed by Arpit Agarwal (namenode)<br>
- <b>NameNode should prune dead storages from storageMap</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7587">HDFS-7587</a>.
- Blocker bug reported by Kihwal Lee and fixed by Jing Zhao (namenode)<br>
- <b>Edit log corruption can happen if append fails with a quota violation</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7579">HDFS-7579</a>.
- Minor improvement reported by Charles Lamb and fixed by Charles Lamb (datanode)<br>
- <b>Improve log reporting during block report rpc failure</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7575">HDFS-7575</a>.
- Critical bug reported by Lars Francke and fixed by Arpit Agarwal <br>
- <b>Upgrade should generate a unique storage ID for each volume</b><br>
- <blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7552">HDFS-7552</a>.
- Major bug reported by Liang Xie and fixed by Liang Xie (datanode , test)<br>
- <b>change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration </b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10182">HDFS-10182</a>.
+ Major bug reported by zhouyingchao and fixed by zhouyingchao <br>
+ <b>Hedged read might overwrite user's buf</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7533">HDFS-7533</a>.
- Major bug reported by Kihwal Lee and fixed by Eric Payne <br>
- <b>Datanode sometimes does not shutdown on receiving upgrade shutdown command</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-10178">HDFS-10178</a>.
+ Critical bug reported by Kihwal Lee and fixed by Kihwal Lee <br>
+ <b>Permanent write failures can happen if pipeline recoveries occur for the first packet</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7531">HDFS-7531</a>.
- Major improvement reported by Lei (Eddy) Xu and fixed by Lei (Eddy) Xu (datanode)<br>
- <b>Improve the concurrent access on FsVolumeList</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9752">HDFS-9752</a>.
+ Critical bug reported by Kihwal Lee and fixed by Walter Su <br>
+ <b>Permanent write failures may happen to slow writers during datanode rolling upgrades</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7503">HDFS-7503</a>.
- Major bug reported by Arpit Agarwal and fixed by Arpit Agarwal (namenode)<br>
- <b>Namenode restart after large deletions can cause slow processReport (due to logging)</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9696">HDFS-9696</a>.
+ Critical bug reported by Kihwal Lee and fixed by Kihwal Lee <br>
+ <b>Garbage snapshot records lingering forever</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7489">HDFS-7489</a>.
- Critical bug reported by Noah Lorang and fixed by Noah Lorang (datanode)<br>
- <b>Incorrect locking in FsVolumeList#checkDirs can hang datanodes</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9688">HDFS-9688</a>.
+ Major test reported by Zhe Zhang and fixed by Zhe Zhang (encryption , test)<br>
+ <b>Test the effect of nested encryption zones in HDFS downgrade</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7470">HDFS-7470</a>.
- Major bug reported by zhaoyunjiong and fixed by zhaoyunjiong (namenode)<br>
- <b>SecondaryNameNode need twice memory when calling reloadFromImageFile</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9669">HDFS-9669</a>.
+ Major improvement reported by Elliott Clark and fixed by Elliott Clark <br>
+ <b>TcpPeerServer should respect ipc.server.listen.queue.size</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7446">HDFS-7446</a>.
- Major improvement reported by Colin Patrick McCabe and fixed by Colin Patrick McCabe (hdfs-client)<br>
- <b>HDFS inotify should have the ability to determine what txid it has read up to</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9629">HDFS-9629</a>.
+ Major improvement reported by Xiao Chen and fixed by Xiao Chen <br>
+ <b>Update the footer of Web UI to show year 2016</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7443">HDFS-7443</a>.
- Blocker bug reported by Kihwal Lee and fixed by Colin Patrick McCabe <br>
- <b>Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9530">HDFS-9530</a>.
+ Critical bug reported by Fei Hui and fixed by Brahma Reddy Battula (datanode)<br>
+ <b>ReservedSpace is not cleared for abandoned Blocks</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7425">HDFS-7425</a>.
- Minor bug reported by Chris Nauroth and fixed by Chris Nauroth (namenode)<br>
- <b>NameNode block deletion logging uses incorrect appender.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9365">HDFS-9365</a>.
+ Major bug reported by Tsz Wo Nicholas Sze and fixed by Tsz Wo Nicholas Sze (balancer & mover)<br>
+ <b>Balancer does not work with the HDFS-6376 HA setup</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7314">HDFS-7314</a>.
- Major improvement reported by Ming Ma and fixed by Ming Ma <br>
- <b>When the DFSClient lease cannot be renewed, abort open-for-write files rather than the entire DFSClient</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-9347">HDFS-9347</a>.
+ Major bug reported by Wei-Chiu Chuang and fixed by Wei-Chiu Chuang (test)<br>
+ <b>Invariant assumption in TestQuorumJournalManager.shutdown() is wrong</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7278">HDFS-7278</a>.
- Major improvement reported by Colin Patrick McCabe and fixed by Colin Patrick McCabe (datanode)<br>
- <b>Add a command that allows sysadmins to manually trigger full block reports from a DN</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-8845">HDFS-8845</a>.
+ Major bug reported by Chang Li and fixed by Chang Li <br>
+ <b>DiskChecker should not traverse the entire tree</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7263">HDFS-7263</a>.
- Major bug reported by Konstantin Shvachko and fixed by Tao Luo (hdfs-client)<br>
- <b>Snapshot read can reveal future bytes for appended files.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-8581">HDFS-8581</a>.
+ Minor bug reported by tongshiquan and fixed by J.Andreina (namenode)<br>
+ <b>ContentSummary on / skips further counts on yielding lock</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7235">HDFS-7235</a>.
- Major bug reported by Yongjun Zhang and fixed by Yongjun Zhang (datanode , namenode)<br>
- <b>DataNode#transferBlock should report blocks that don't exist using reportBadBlock</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-7530">HDFS-7530</a>.
+ Minor bug reported by Charles Lamb and fixed by Charles Lamb (namenode)<br>
+ <b>Allow renaming of encryption zone roots</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7225">HDFS-7225</a>.
- Major bug reported by Zhe Zhang and fixed by Zhe Zhang (namenode)<br>
- <b>Remove stale block invalidation work when DN re-registers with different UUID</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-7258">HDFS-7258</a>.
+ Minor bug reported by Xiaoyu Yao and fixed by Xiaoyu Yao (namenode)<br>
+ <b>CacheReplicationMonitor rescan schedule log should use DEBUG level instead of INFO level</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7213">HDFS-7213</a>.
- Critical bug reported by Daryn Sharp and fixed by Eric Payne (namenode)<br>
- <b>processIncrementalBlockReport performance degradation</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-2580">HDFS-2580</a>.
+ Minor improvement reported by Harsh J and fixed by Harsh J (namenode)<br>
+ <b>NameNode#main(...) can make use of GenericOptionsParser.</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7182">HDFS-7182</a>.
- Major improvement reported by Ming Ma and fixed by Ming Ma <br>
- <b>JMX metrics aren't accessible when NN is busy</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13579">HADOOP-13579</a>.
+ Blocker bug reported by Akira Ajisaka and fixed by Tsuyoshi Ozawa <br>
+ <b>Fix source-level compatibility after HADOOP-11252</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7035">HDFS-7035</a>.
- Major sub-task reported by Lei (Eddy) Xu and fixed by Lei (Eddy) Xu (datanode)<br>
- <b>Make adding a new data directory to the DataNode an atomic operation and improve error handling</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13494">HADOOP-13494</a>.
+ Major bug reported by Sean Mackrory and fixed by Sean Mackrory (security)<br>
+ <b>ReconfigurableBase can log sensitive information</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-7009">HDFS-7009</a>.
- Major bug reported by Ming Ma and fixed by Ming Ma (datanode)<br>
- <b>Active NN and standby NN have different live nodes</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13434">HADOOP-13434</a>.
+ Major bug reported by Owen O'Malley and fixed by Owen O'Malley <br>
+ <b>Add quoting to Shell class</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-4882">HDFS-4882</a>.
- Critical bug reported by Zesheng Wu and fixed by Ravi Prakash (hdfs-client , namenode)<br>
- <b>Prevent the Namenode's LeaseManager from looping forever in checkLeases</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13350">HADOOP-13350</a>.
+ Blocker bug reported by Xiao Chen and fixed by Xiao Chen (build)<br>
+ <b>Additional fix to LICENSE and NOTICE</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HDFS-3443">HDFS-3443</a>.
- Major bug reported by suja s and fixed by Vinayakumar B (auto-failover , ha)<br>
- <b>Fix NPE when namenode transition to active during startup by adding checkNNStartup() in NameNodeRpcServer</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13298">HADOOP-13298</a>.
+ Minor improvement reported by Xiao Chen and fixed by Tsuyoshi Ozawa <br>
+ <b>Fix the leftover L&N files in hadoop-build-tools/src/main/resources/META-INF/</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12280">HADOOP-12280</a>.
- Minor improvement reported by Masatake Iwasaki and fixed by Masatake Iwasaki (test)<br>
- <b>Skip unit tests based on maven profile rather than NativeCodeLoader.isNativeCodeLoaded</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13297">HADOOP-13297</a>.
+ Major bug reported by Akira Ajisaka and fixed by Sean Busbey (build)<br>
+ <b>Add missing dependency in setting maven-remote-resource-plugin to fix builds</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11934">HADOOP-11934</a>.
- Blocker bug reported by Mike Yoder and fixed by Larry McCay (security)<br>
- <b>Use of JavaKeyStoreProvider in LdapGroupsMapping causes infinite loop</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13290">HADOOP-13290</a>.
+ Major improvement reported by Konstantin Shvachko and fixed by Jonathan Hung (ipc)<br>
+ <b>Appropriate use of generics in FairCallQueue</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11932">HADOOP-11932</a>.
- Critical bug reported by Jian He and fixed by Brahma Reddy Battula <br>
- <b> MetricsSinkAdapter hangs when being stopped</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13255">HADOOP-13255</a>.
+ Major bug reported by Xiao Chen and fixed by Xiao Chen (kms)<br>
+ <b>KMSClientProvider should check and renew tgt when doing delegation token operations.</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11812">HADOOP-11812</a>.
- Blocker improvement reported by Gera Shegalov and fixed by Gera Shegalov (fs)<br>
- <b>Implement listLocatedStatus for ViewFileSystem to speed up split calculation</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13192">HADOOP-13192</a>.
+ Critical bug reported by binde and fixed by binde (util)<br>
+ <b>org.apache.hadoop.util.LineReader cannot handle multibyte delimiters correctly</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11802">HADOOP-11802</a>.
- Major bug reported by Eric Payne and fixed by Colin Patrick McCabe <br>
- <b>DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13189">HADOOP-13189</a>.
+ Major bug reported by Konstantin Shvachko and fixed by Vinitha Reddy Gankidi (ipc)<br>
+ <b>FairCallQueue makes callQueue larger than the configured capacity.</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11730">HADOOP-11730</a>.
- Major bug reported by Takenori Sato and fixed by Takenori Sato (fs/s3)<br>
- <b>Regression: s3n read failure recovery broken</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13052">HADOOP-13052</a>.
+ Major bug reported by Daryn Sharp and fixed by Daryn Sharp (fs)<br>
+ <b>ChecksumFileSystem mishandles crc file permissions</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11710">HADOOP-11710</a>.
- Critical sub-task reported by Sean Busbey and fixed by Sean Busbey (fs)<br>
- <b>Make CryptoOutputStream behave like DFSOutputStream wrt synchronization</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13043">HADOOP-13043</a>.
+ Major bug reported by Andrew Wang and fixed by Andrew Wang <br>
+ <b>Add LICENSE.txt entries for bundled javascript dependencies</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11674">HADOOP-11674</a>.
- Critical bug reported by Sean Busbey and fixed by Sean Busbey (io)<br>
- <b>oneByteBuf in CryptoInputStream and CryptoOutputStream should be non static</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-13042">HADOOP-13042</a>.
+ Major bug reported by Andrew Wang and fixed by Andrew Wang <br>
+ <b>Restore lost leveldbjni LICENSE and NOTICE changes</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11604">HADOOP-11604</a>.
- Critical bug reported by Liang Xie and fixed by Chris Nauroth (net)<br>
- <b>Prevent ConcurrentModificationException while closing domain sockets during shutdown of DomainSocketWatcher thread.</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12958">HADOOP-12958</a>.
+ Major bug reported by Jason Lowe and fixed by Sangjin Lee <br>
+ <b>PhantomReference for filesystem statistics can trigger OOM</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11506">HADOOP-11506</a>.
- Major improvement reported by Dmitriy V. Ryaboy and fixed by Gera Shegalov (conf)<br>
- <b>Configuration variable expansion regex expensive for long values</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12893">HADOOP-12893</a>.
+ Blocker bug reported by Allen Wittenauer and fixed by Xiao Chen (build)<br>
+ <b>Verify LICENSE.txt and NOTICE.txt</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11491">HADOOP-11491</a>.
- Critical bug reported by Gera Shegalov and fixed by Brahma Reddy Battula (fs)<br>
- <b>HarFs incorrectly declared as requiring an authority</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12810">HADOOP-12810</a>.
+ Major bug reported by Ryan Blue and fixed by Ryan Blue (fs , fs/s3)<br>
+ <b>FileSystem#listLocatedStatus causes unnecessary RPC calls</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11482">HADOOP-11482</a>.
- Major bug reported by Arun Suresh and fixed by Arun Suresh <br>
- <b>Use correct UGI when KMSClientProvider is called by a proxy user</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12805">HADOOP-12805</a>.
+ Major improvement reported by Ted Yu and fixed by Ted Yu <br>
+ <b>Annotate CanUnbuffer with @InterfaceAudience.Public</b><br>
+ <blockquote>Made CanBuffer interface public for use in client applications.</blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12800">HADOOP-12800</a>.
+ Major improvement reported by Zhe Zhang and fixed by Zhe Zhang (build , yetus)<br>
+ <b>Copy docker directory from 2.8 to 2.7/2.6 repos to enable pre-commit Jenkins runs</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11466">HADOOP-11466</a>.
- Minor improvement reported by Suman Somasundar and fixed by Suman Somasundar (io , performance , util)<br>
- <b>FastByteComparisons: do not use UNSAFE_COMPARER on the SPARC architecture because it is slower there</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12789">HADOOP-12789</a>.
+ Minor improvement reported by Sangjin Lee and fixed by Sangjin Lee (util)<br>
+ <b>log classpath of ApplicationClassLoader at INFO level</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11368">HADOOP-11368</a>.
- Major bug reported by Arun Suresh and fixed by Arun Suresh (kms)<br>
- <b>Fix SSLFactory truststore reloader thread leak in KMSClientProvider</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12773">HADOOP-12773</a>.
+ Major bug reported by Sangjin Lee and fixed by Sangjin Lee (util)<br>
+ <b>HBase classes fail to load with client/job classloader enabled</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11350">HADOOP-11350</a>.
- Major bug reported by Benoy Antony and fixed by Benoy Antony (security)<br>
- <b>The size of header buffer of HttpServer is too small when HTTPS is enabled</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12682">HADOOP-12682</a>.
+ Major bug reported by Wei-Chiu Chuang and fixed by Wei-Chiu Chuang <br>
+ <b>Fix TestKMS#testKMSRestart* failure</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11343">HADOOP-11343</a>.
- Blocker bug reported by Jerry Chen and fixed by Jerry Chen (security)<br>
- <b>Overflow is not properly handled in caclulating final iv for AES CTR</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12589">HADOOP-12589</a>.
+ Major bug reported by Tsuyoshi Ozawa and fixed by Masatake Iwasaki (test)<br>
+ <b>Fix intermittent test failure of TestCopyPreserveFlag </b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11333">HADOOP-11333</a>.
- Major bug reported by zhaoyunjiong and fixed by zhaoyunjiong <br>
- <b>Fix deadlock in DomainSocketWatcher when the notification pipe is full</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12559">HADOOP-12559</a>.
+ Major bug reported by Zhe Zhang and fixed by Zhe Zhang (security)<br>
+ <b>KMS connection failures should trigger TGT renewal</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11316">HADOOP-11316</a>.
- Blocker bug reported by Tsuyoshi Ozawa and fixed by Tsuyoshi Ozawa <br>
- <b>"mvn package -Pdist,docs -DskipTests -Dtar" fails because of non-ascii characters</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12482">HADOOP-12482</a>.
+ Major bug reported by Tony Wu and fixed by Tony Wu <br>
+ <b>Race condition in JMX cache update</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11295">HADOOP-11295</a>.
- Major bug reported by Ming Ma and fixed by Ming Ma <br>
- <b>RPC Server Reader thread can't shutdown if RPCCallQueue is full</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-12348">HADOOP-12348</a>.
+ Major bug reported by zhihai xu and fixed by zhihai xu (metrics)<br>
+ <b>MetricsSystemImpl creates MetricsSourceAdapter with wrong time unit parameter.</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11238">HADOOP-11238</a>.
- Minor bug reported by Chris Li and fixed by Chris Li <br>
- <b>Update the NameNode's Group Cache in the background when possible</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11361">HADOOP-11361</a>.
+ Major bug reported by Brahma Reddy Battula and fixed by Brahma Reddy Battula <br>
+ <b>Fix a race condition in MetricsSourceAdapter.updateJmxCache</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-10786">HADOOP-10786</a>.
- Major bug reported by Tobi Vollebregt and fixed by Stephen Chu (security)<br>
- <b>Fix UGI#reloginFromKeytab on Java 8</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-11301">HADOOP-11301</a>.
+ Major improvement reported by Maysam Yabandeh and fixed by Maysam Yabandeh <br>
+ <b>[optionally] update jmx cache to drop old metrics</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-8151">HADOOP-8151</a>.
- Major bug reported by Todd Lipcon and fixed by Matt Foley (io , native)<br>
- <b>Error handling in snappy decompressor throws invalid exceptions</b><br>
+<li> <a href="https://issues.apache.org/jira/browse/HADOOP-7817">HADOOP-7817</a>.
+ Major bug reported by Kristofer Tomasette and fixed by Kanaka Kumar Avvaru (fs)<br>
+ <b>RawLocalFileSystem.append() should give FSDataOutputStream with accurate .getPos()</b><br>
<blockquote></blockquote></li>
-<li> <a href="https://issues.apache.org/jira/browse/HADOOP-7139">HADOOP-7139</a>.
- Major improvement reported by Stephen Rose and fixed by Kanaka Kumar Avvaru (io)<br>
- <b>Allow appending to existing SequenceFiles</b><br>
- <blockquote>Existing sequence files can be appended.</blockquote></li>
</ul>
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