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[HDFS-6551] Rename with OVERWRITE option may throw NPE when the target file/directory is a reference INode - HDFS - [issue]
...The following steps can reproduce the NPE:1. create a snapshot on /2. move /foo/file1 to /bar/3. rename /foo/file2 to /bar/file1 with the OVERWRITE optionAfter step 2, /bar/file1 is a DstRef...
http://issues.apache.org/jira/browse/HDFS-6551    Author: Jing Zhao, 2014-06-19, 16:17
[HDFS-6423] Diskspace quota usage should be updated when appending data to partial block - HDFS - [issue]
...When appending new data to a file whose last block is a partial block, the diskspace quota usage is not correctly update. For example, suppose the block size is 1024 bytes, and a file has si...
http://issues.apache.org/jira/browse/HDFS-6423    Author: Jing Zhao, 2014-06-19, 11:00
Re: HDFS-6376 - HDFS - [mail # dev]
...Hi Dave,    The Jenkins only runs against trunk. Thus you need to upload a patchfor trunk instead of 2.4.Thanks,-JingOn Wed, May 28, 2014 at 11:28 AM,  wrote:CONFIDENTIAL...
   Author: Jing Zhao, 2014-05-28, 18:35
[HDFS-6227] ShortCircuitCache#unref should purge ShortCircuitReplicas whose streams have been closed by java interrupts - HDFS - [issue]
...While running tests in a single node cluster, where short circuit read is enabled and multiple threads may read the same file concurrently, one of the read got ClosedChannelException and fai...
http://issues.apache.org/jira/browse/HDFS-6227    Author: Jing Zhao, 2014-05-28, 16:16
[HDFS-6438] DeleteSnapshot should be a DELETE request in WebHdfs - HDFS - [issue]
...We add 3 snapshot related APIs into WebHdfs in HDFS-6432, among which DeleteSnapshot should be a DELETE request instead of PUT. This jira aims to fix this and update the WebHdfs document....
http://issues.apache.org/jira/browse/HDFS-6438    Author: Jing Zhao, 2014-05-23, 20:53
[HDFS-6420] DFSAdmin#refreshNodes should be sent to both NameNodes in HA setup - HDFS - [issue]
...Currently in HA setup (with logical URI), the DFSAdmin#refreshNodes command is sent to the NameNode first specified in the configuration by default. Users can use "-fs" option to specify whi...
http://issues.apache.org/jira/browse/HDFS-6420    Author: Jing Zhao, 2014-05-20, 00:15
[HDFS-4052] BlockManager#invalidateWork should print logs outside the lock - HDFS - [issue]
...Info level log information printed holding the lock is long and is printed by traversing a list/array. It would be better to move it outside of the lock....
http://issues.apache.org/jira/browse/HDFS-4052    Author: Jing Zhao, 2014-05-15, 23:31
[HDFS-6266] Identify full path for a given INode - HDFS - [issue]
...Currently when identifying the full path of a given inode, FSDirectory#getPathComponents and FSDirectory#getFullPathName can only handle normal cases where the inode and its ancestors are no...
http://issues.apache.org/jira/browse/HDFS-6266    Author: Jing Zhao, 2014-04-25, 14:40
[HDFS-5167] Add metrics about the NameNode retry cache - HDFS - [issue]
...It will be helpful to have metrics in NameNode about the retry cache, such as the retry count etc....
http://issues.apache.org/jira/browse/HDFS-5167    Author: Jing Zhao, 2014-04-10, 14:12
[HDFS-6053] Fix TestDecommissioningStatus and TestDecommission in branch-2 - HDFS - [issue]
...The failure is caused by the backport of HDFS-5285. In BlockManager#isReplicationInProgress, "if (bc instanceof MutableBlockCollection)" should be replaced by "if (bc.isUnderConstruction())"...
http://issues.apache.org/jira/browse/HDFS-6053    Author: Jing Zhao, 2014-04-10, 14:12
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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