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[HDFS-5228] The RemoteIterator returned by DistributedFileSystem.listFiles(..) may throw NPE - HDFS - [issue]
...Get a RemoteIterator from DistributedFileSystem.listFiles(..) with a relative path.  Then, it will result a NullPointerException when calling hasNext() from the RemoteIterator.This bug ...
http://issues.apache.org/jira/browse/HDFS-5228    Author: Tsz Wo, 2013-09-24, 23:36
[HDFS-5188] Clean up BlockPlacementPolicy and its implementations - HDFS - [issue]
...Below is a list of code cleanup tasks for BlockPlacementPolicy and its implementations: Define constants for dfs.block.replicator.classname. Combine adjustExcludedNodes and addToExcludedNode...
http://issues.apache.org/jira/browse/HDFS-5188    Author: Tsz Wo, 2013-09-16, 05:26
[HDFS-570] When opening a file for read, make the file length avaliable to client. - HDFS - [issue]
...In order to support read consistency, DFSClient needs the file length at the file opening time.  In the current implmentation, DFSClient obtains the file length at the file opening time...
http://issues.apache.org/jira/browse/HDFS-570    Author: Tsz Wo, 2013-08-14, 05:44
[HDFS-2887] Define a FSVolume interface - HDFS - [issue]
...FSVolume is an inner class in FSDataset.  It is actually a part of the implementation of FSDatasetInterface.  It is better to define a new interface, namely FSVolumeInterface, to c...
http://issues.apache.org/jira/browse/HDFS-2887    Author: Tsz Wo, 2013-08-14, 05:08
[HDFS-5017] Extends LightWeightGSet to support eviction of expired elements - HDFS - [issue]
...We extends LightWeightGSet to support eviction of expired elements so that namenode could use it as the RetryCache....
http://issues.apache.org/jira/browse/HDFS-5017    Author: Tsz Wo, 2013-07-23, 00:47
[HDFS-4908] Reduce snapshot inode memory usage - HDFS - [issue]
...Snapshots currently use INodeFile and INodeDirectory for storing previous file/dir states as snapshot inodes.  However, INodeFile and INodeDirectory have some fields not used by snapsho...
http://issues.apache.org/jira/browse/HDFS-4908    Author: Tsz Wo, 2013-07-11, 15:09
[HDFS-4914] When possible, Use DFSClient.Conf instead of Configuration - HDFS - [issue]
...In DFSClient and the related classes, we should use DFSClient.Conf instead of Configuration....
http://issues.apache.org/jira/browse/HDFS-4914    Author: Tsz Wo, 2013-06-20, 15:07
[HDFS-4875] Add a test for testing snapshot file length - HDFS - [issue]
...Here is a test idea from Suresh: A file was length x at the time of snapshot (say s1) creation Later y bytes get added to the file through appendWhen client gets block locations for the file...
http://issues.apache.org/jira/browse/HDFS-4875    Author: Tsz Wo, 2013-06-18, 15:07
[HDFS-4819] Update Snapshot doc for HDFS-4758 - HDFS - [issue]
...Update Snapshot doc to clarify that nested snapshots are not allowed....
http://issues.apache.org/jira/browse/HDFS-4819    Author: Tsz Wo, 2013-06-13, 19:04
[HDFS-3960] Snapshot of Being Written Files - HDFS - [issue]
...Here is a design question: Suppose there is a being written file when a snapshot is being taken.  What should the length of the file be shown in the snapshot?  In other words, how ...
http://issues.apache.org/jira/browse/HDFS-3960    Author: Tsz Wo, 2013-06-13, 00:21
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