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[HDFS-4479] logSync() with the FSNamesystem lock held in commitBlockSynchronization - HDFS - [issue]
...In FSNamesystem#commitBlockSynchronization of branch-1, logSync() may be called when the FSNamesystem lock is held. Similar to HDFS-4186, this may cause some performance issue.The following ...
http://issues.apache.org/jira/browse/HDFS-4479    Author: Jing Zhao, 2013-05-15, 06:16
[HDFS-4809] Add more unit tests for the undo section of rename - HDFS - [issue]
...1. Add more unit tests for the undo section of rename2. Fix a bug in FSDirectory#addChild: if a QuotaExceededException is thrown in parent.addChild(child, true, iip.getLatestSnapshot(), inod...
http://issues.apache.org/jira/browse/HDFS-4809    Author: Jing Zhao, 2013-05-09, 14:08
[HDFS-4806] For an INodeDirectoryWithSnapshot, use INode#isInLatestSnapshot() to check if the added/removed child should be recorded in snapshot diff - HDFS - [issue]
...Before supporting rename with snapshots, when adding/remove a child inode to/from a directory, if the directory is already an INodeDirectoryWithSnapshot, we can directly record the change in...
http://issues.apache.org/jira/browse/HDFS-4806    Author: Jing Zhao, 2013-05-08, 14:08
[HDFS-4800] Fix INodeDirectoryWithSnapshot#cleanDeletedINode - HDFS - [issue]
...HDFS-4791 updated and fixed the deletion logic for reference node, but did not update INodeDirectoryWithSnapshot#cleanDeletedINode. When deleting a snapshot s, after we merge s1 to its prior...
http://issues.apache.org/jira/browse/HDFS-4800    Author: Jing Zhao, 2013-05-07, 14:13
[HDFS-4062] In branch-1, FSNameSystem#invalidateWorkForOneNode and FSNameSystem#computeReplicationWorkForBlock should print logs outside of the namesystem lock - HDFS - [issue]
...Similar to HDFS-4052 for trunk, both FSNameSystem#invalidateWorkForOneNode and FSNameSystem#computeReplicationWorkForBlock in branch-1 should print long log info level information outside of...
http://issues.apache.org/jira/browse/HDFS-4062    Author: Jing Zhao, 2013-05-06, 04:53
[HDFS-3966] For branch-1, TestFileCreation should use JUnit4 to make assumeTrue work - HDFS - [issue]
...Currently in TestFileCreation for branch-1, assumeTrue() is used by two test cases in order to check if the OS is Linux. Thus JUnit 4 should be used to enable assumeTrue....
http://issues.apache.org/jira/browse/HDFS-3966    Author: Jing Zhao, 2013-05-06, 03:50
[HDFS-3961] FSEditLog preallocate() needs to reset the position of PREALLOCATE_BUFFER when more than 1MB size is needed - HDFS - [issue]
...In the new preallocate() function, when the required size is larger 1MB, we need to reset the position for PREALLOCATION_BUFFER every time when we have allocated 1MB. Otherwise seems only 1M...
http://issues.apache.org/jira/browse/HDFS-3961    Author: Jing Zhao, 2013-05-03, 04:10
[HDFS-4760] Update inodeMap after node replacement - HDFS - [issue]
...Similar with HDFS-4757, we need to update the inodeMap after node replacement. Because a lot of node replacement happens in the snapshot branch (e.g., INodeDirectory => INodeDirectoryWith...
http://issues.apache.org/jira/browse/HDFS-4760    Author: Jing Zhao, 2013-05-01, 14:09
[HDFS-4773] Fix bugs in quota usage updating/computation - HDFS - [issue]
...1. FileWithSnapshot#updateQuotaAndCollectBlocks did not consider the scenario that all the snapshots has been deleted from a snapshot copy of deleted file. This may lead to a divide-by-0 err...
http://issues.apache.org/jira/browse/HDFS-4773    Author: Jing Zhao, 2013-04-30, 14:14
[HDFS-4761] Refresh INodeMap in FSDirectory#reset() - HDFS - [issue]
...When resetting FSDirectory, the inodeMap should also be reset. I.e., we should clear the inodeMap and then put in the new root node....
http://issues.apache.org/jira/browse/HDFS-4761    Author: Jing Zhao, 2013-04-27, 15:06
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB