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[HDFS-5498] Improve datanode startup time - HDFS - [issue]
...Similarly to HDFS-5027, an improvement  can be made for getVomeMap(). This is the phase in which ReplicaMap.is populated.  But it will be even better if datanode scans only once an...
http://issues.apache.org/jira/browse/HDFS-5498    Author: Kihwal Lee, 2014-02-25, 19:29
[HDFS-6014] Fix findbug warnings introduced by HDFS-5583 - HDFS - [issue]
...Two findbug warning have been generated by HDFS-5583....
http://issues.apache.org/jira/browse/HDFS-6014    Author: Kihwal Lee, 2014-02-25, 18:52
[HDFS-6015] Fix TestBlockRecovery#testRaceBetweenReplicaRecoveryAndFinalizeBlock - HDFS - [issue]
...After HDFS-5583, TestBlockRecovery.testRaceBetweenReplicaRecoveryAndFinalizeBlock started failing. It seems HDFS-5583 exposed a bug.When a receiver thread is interrupted, it is supposed to i...
http://issues.apache.org/jira/browse/HDFS-6015    Author: Kihwal Lee, 2014-02-25, 18:51
[HDFS-5522] Datanode disk error check may be incorrectly skipped - HDFS - [issue]
...After HDFS-4581 and HDFS-4699, checkDiskError() is not called when network errors occur during processing data node requests.  This appears to create problems when a disk is having prob...
http://issues.apache.org/jira/browse/HDFS-5522    Author: Kihwal Lee, 2014-02-24, 21:48
[HDFS-5073] TestListCorruptFileBlocks fails intermittently - HDFS - [issue]
...Sometimes the test case fails while removing finalized block files. It seems to fail if BlockPoolSliceScanner happens to run while deleting....
http://issues.apache.org/jira/browse/HDFS-5073    Author: Kihwal Lee, 2014-02-24, 20:58
[HDFS-5585] Provide admin commands for data node upgrade - HDFS - [issue]
...Several new methods to ClientDatanodeProtocol may need to be added to support querying version, initiating upgrade, etc.  The admin CLI needs to be added as well. This primary use case ...
http://issues.apache.org/jira/browse/HDFS-5585    Author: Kihwal Lee, 2014-02-21, 20:52
[HDFS-5496] Make replication queue initialization asynchronous - HDFS - [issue]
...Today, initialization of replication queues blocks safe mode exit and certain HA state transitions. For a big name space, this can take hundreds of seconds with the FSNamesystem write lock h...
http://issues.apache.org/jira/browse/HDFS-5496    Author: Kihwal Lee, 2014-02-21, 04:51
[HDFS-5586] Add quick-restart option for datanode - HDFS - [issue]
...This feature, combined with the graceful shutdown feature, will enable data nodes to come back up and start serving quickly.  This is likely a command line option for data node, which t...
http://issues.apache.org/jira/browse/HDFS-5586    Author: Kihwal Lee, 2014-02-20, 22:16
[HDFS-5584] Add OOB upgrade response and client-side logic for reads - HDFS - [issue]
...Similarly to HDFS-5583, readers can also benefit from the knowledge that a data node failure is caused by an upgrade restart.  Instead of permanently removing from the potential data so...
http://issues.apache.org/jira/browse/HDFS-5584    Author: Kihwal Lee, 2014-02-13, 13:42
[HDFS-5881] Fix skip() of the short-circuit local reader (legacy). - HDFS - [issue]
...It looks like a bug in skip() was introduced by HDFS-2356 and got fixed as a part of HDFS-2834, which is an API change JIRA.  This bug causes to skip more (as many as the new offsetFrom...
http://issues.apache.org/jira/browse/HDFS-5881    Author: Kihwal Lee, 2014-02-07, 14:52
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