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[HDFS-6041] Downgrade/Finalize should rename the rollback image instead of purging it - HDFS - [issue]
...After we do rollingupgrade downgrade/finalize, instead of purging the rollback image, we'd better rename it back to normal image, since the rollback image can be the most recent checkpoint....
http://issues.apache.org/jira/browse/HDFS-6041    Author: Jing Zhao, 2014-03-04, 04:43
[HDFS-5333] Improvement of current HDFS Web UI - HDFS - [issue]
...This is an umbrella jira for improving the current JSP-based HDFS Web UI....
http://issues.apache.org/jira/browse/HDFS-5333    Author: Jing Zhao, 2014-02-28, 21:45
Re: [VOTE] Merge HDFS-5535 Rolling Upgrade Improvement - HDFS - [mail # dev]
...+1 for the merging.On Fri, Feb 28, 2014 at 10:58 AM, Chris Nauroth wrote:CONFIDENTIALITY NOTICENOTICE: This message is intended for the use of the individual or entity to which it is address...
   Author: Jing Zhao, 2014-02-28, 19:04
[HDFS-6018] Exception recorded in LOG when IPCLoggerChannel#close is called - HDFS - [issue]
...Currently in IPCLoggerChannel#close, we have:@Override  public void close() {    QuorumJournalManager.LOG.info("Closing", new Exception());    // No m...
http://issues.apache.org/jira/browse/HDFS-6018    Author: Jing Zhao, 2014-02-27, 18:30
[HDFS-6026] Fix TestDFSUpgrade and TestDataNodeRollingUpgrade - HDFS - [issue]
...These two unit tests failed after HDFS-6000 changes the expectation of SafeMode for non-HA setup: the NN now needs to be in SafeMode for rolling upgrade prepare....
http://issues.apache.org/jira/browse/HDFS-6026    Author: Jing Zhao, 2014-02-27, 03:11
[HDFS-6000] Avoid saving namespace when starting rolling upgrade - HDFS - [issue]
...Currently when administrator sends the "rollingUpgrade start" command to the active NN, the NN will trigger a checkpoint (the rollback fsimage). This will cause NN not able to serve for a pe...
http://issues.apache.org/jira/browse/HDFS-6000    Author: Jing Zhao, 2014-02-25, 22:01
[HDFS-5399] Revisit SafeModeException and corresponding retry policies - HDFS - [issue]
...Currently for NN SafeMode, we have the following corresponding retry policies: In non-HA setup, for certain API call ("create"), the client will retry if the NN is in SafeMode. Specifically,...
http://issues.apache.org/jira/browse/HDFS-5399    Author: Jing Zhao, 2014-02-24, 20:58
[HDFS-5999] Do not create rollback fsimage when it already exists - HDFS - [issue]
...Currently in FSEditLogLoader#applyEditLogOp, if the op is OP_START_LOG_SEGMENT, we do an extra rollback fsimage with condition "totalEdits > 1".This may cause some issue when we restart a...
http://issues.apache.org/jira/browse/HDFS-5999    Author: Jing Zhao, 2014-02-23, 21:36
[HDFS-5985] SimulatedFSDataset#disableAndPurgeTrashStorage should not throw UnsupportedOperationException - HDFS - [issue]
...Instead, we can let the method do nothing. This can fix part of the failed unit tests in https://issues.apache.org/jira/browse/HDFS-5535?focusedCommentId=13906717&page=com.atlassian.jira...
http://issues.apache.org/jira/browse/HDFS-5985    Author: Jing Zhao, 2014-02-20, 22:07
[HDFS-5984] Fix TestEditLog and TestStandbyCheckpoints - HDFS - [issue]
...This jira aims to fix current test failures in TestEditLog, TestStandbyCheckpoints, and TestBookKeeperHACheckpoints. These failures are caused by changes in the NameNode side....
http://issues.apache.org/jira/browse/HDFS-5984    Author: Jing Zhao, 2014-02-20, 21:42
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