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[HDFS-5376] Incremental rescanning of cached blocks and cache entries - HDFS - [issue]
...CacheReplicationMonitor#rescan is invoked whenever a new cache entry is added or removed. This involves a complete rescan of all cache entries and cached blocks, which is potentially expensi...
http://issues.apache.org/jira/browse/HDFS-5376    Author: Andrew Wang, 2013-11-07, 21:13
[HDFS-5458] Datanode failed volume threshold ignored if exception is thrown in getDataDirsFromURIs - HDFS - [issue]
...Saw a stacktrace of datanode startup with a bad volume, where even listing directories would throw an IOException. The failed volume threshold was set to 1, but it would fatally error out in...
http://issues.apache.org/jira/browse/HDFS-5458    Author: Andrew Wang, 2013-11-06, 13:35
[HDFS-5035] getFileLinkStatus and rename do not correctly check permissions of symlinks - HDFS - [issue]
...Operations like getFileLinkStatus and rename operate on symlinks, not symlink targets. However, permission checks right now are being done on the symlink target, resulting in wonky behavior....
http://issues.apache.org/jira/browse/HDFS-5035    Author: Andrew Wang, 2013-11-02, 13:34
Re: Replacing the JSP web UIs to HTML 5 applications - HDFS - [mail # dev]
...I'm also not convinced that a Javascript-based approach is the way to go. We shouldn't switch the default UI until (at a minimum) we have the command-line tools that Colin requested, and eve...
   Author: Andrew Wang, 2013-10-30, 19:11
[HDFS-5419] Fixup test-patch.sh warnings on HDFS-4949 branch - HDFS - [issue]
...A few issues cropped up from a Jenkins run against a consolidated HDFS-4949 patch:https://builds.apache.org/job/PreCommit-HDFS-Build/5270//testReport/...
http://issues.apache.org/jira/browse/HDFS-5419    Author: Andrew Wang, 2013-10-25, 02:58
[HDFS-5405] Fix possible RetryCache hang for caching RPC handlers in FSNamesystem - HDFS - [issue]
...Related to the fix in HDFS-5299, we need to make sure that uncaught exceptions happen before RetryCache.waitForCompletion, or badly timed failovers can lead to a perma-hang....
http://issues.apache.org/jira/browse/HDFS-5405    Author: Andrew Wang, 2013-10-24, 06:40
[HDFS-5096] Automatically cache new data added to a cached path - HDFS - [issue]
...For some applications, it's convenient to specify a path to cache, and have HDFS automatically cache new data added to the path without sending a new caching request or a manual refresh comm...
http://issues.apache.org/jira/browse/HDFS-5096    Author: Andrew Wang, 2013-10-18, 19:41
[HDFS-5383] fix broken caching unit tests - HDFS - [issue]
...Looks like some recent changes are causing some PB/edit/fsimage type failures:https://builds.apache.org/job/HDFS-4949_nightly/87/testReport/...
http://issues.apache.org/jira/browse/HDFS-5383    Author: Andrew Wang, 2013-10-17, 21:31
Re: About Block related classes in hdfs package - HDFS - [mail # dev]
...Hey Yoonmin,  Unfortunately I agree it's a bit complex, especially because "Block" is sometimes used where "Replica" might be more accurate. If you find any ambiguities like this, I thi...
   Author: Andrew Wang, 2013-10-16, 07:11
[HDFS-5224] Refactor PathBasedCache* methods to use a Path rather than a String - HDFS - [issue]
...As discussed in HDFS-5213, we should refactor PathBasedCacheDirective and related methods in DistributedFileSystem to use a Path to represent paths to cache, rather than a String....
http://issues.apache.org/jira/browse/HDFS-5224    Author: Andrew Wang, 2013-10-11, 20:44
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