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[HDFS-5019] Cleanup imports in HDFS project - HDFS - [issue]
...There are some unused imported packages in current code base which cause some unnecessary java warnings. Also, the sequence of imports should follow alphabet and import "x.x.*" is not recomm...
http://issues.apache.org/jira/browse/HDFS-5019    Author: Junping Du, 2014-03-25, 19:25
[HDFS-5267] Remove volatile from LightWeightHashSet - HDFS - [issue]
...LightWeight*Set is not supposed to be thread-safe and there is no point to use volatile for modification....
http://issues.apache.org/jira/browse/HDFS-5267    Author: Junping Du, 2014-02-24, 20:58
[HDFS-5183] Combine ReplicaPlacementPolicy with VolumeChoosingPolicy together to have a global view in choosing DN storage for replica. - HDFS - [issue]
...Per discussion in HDFS-5157, There are two different ways to handle BlockPlacementPolicy and ReplicaChoosingPolicy in case of multiple storage types: 1. Client specifies the required st...
http://issues.apache.org/jira/browse/HDFS-5183    Author: Junping Du, 2013-12-18, 20:34
[HDFS-5178] DataTransferProtocol changes for supporting mutiple storages per DN - HDFS - [issue]
...Per discussion in HDFS-5157, DataTransferProtocol should be updated to add StorageID info in some methods, i.e. writeBlock(), replaceBlock(), etc.After that, BlockReceiver (sender also) and ...
http://issues.apache.org/jira/browse/HDFS-5178    Author: Junping Du, 2013-12-18, 20:34
[HDFS-5527] Fix TestUnderReplicatedBlocks on branch HDFS-2832 - HDFS - [issue]
...The failure seems like a deadlock, which is show in:https://builds.apache.org/job/PreCommit-HDFS-Build/5440//testReport/org.apache.hadoop.hdfs.server.blockmanagement/TestUnderReplicatedBlock...
http://issues.apache.org/jira/browse/HDFS-5527    Author: Junping Du, 2013-11-20, 17:14
[HDFS-5528] NPE in instantiating MiniDFSCluster - HDFS - [issue]
...In running some tests, i.e. TestUnderReplicatedBlocks, the test can pass successfully, but some NPE exception is thrown out in RPC server side, like following:2013-11-15 01:59:16,553 ERROR l...
http://issues.apache.org/jira/browse/HDFS-5528    Author: Junping Du, 2013-11-19, 07:51
[HDFS-5510] Fix a findbug warning in DataStorage.java on HDFS-2832 branch - HDFS - [issue]
...The access to datanodeUuid should be synchronized as findBugs warning says....
http://issues.apache.org/jira/browse/HDFS-5510    Author: Junping Du, 2013-11-15, 01:20
[HDFS-5481] Fix TestDataNodeVolumeFailure - HDFS - [issue]
...In test case, it still use datanodeID to generate storage report. Replace with storageID should work well....
http://issues.apache.org/jira/browse/HDFS-5481    Author: Junping Du, 2013-11-09, 00:29
[HDFS-5479] Fix test failures in Balancer. - HDFS - [issue]
...Many tests failures w.r.t balancer as https://builds.apache.org/job/PreCommit-HDFS-Build/5360/#showFailuresLink shows....
http://issues.apache.org/jira/browse/HDFS-5479    Author: Junping Du, 2013-11-08, 23:35
[HDFS-5435] File append fails to initialize storageIDs - HDFS - [issue]
...Several NPE exceptions in append related operations is because forget setting storageIDs in initiate DataStreamer....
http://issues.apache.org/jira/browse/HDFS-5435    Author: Junping Du, 2013-10-28, 19:48
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