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[HDFS-5320] Add datanode caching metrics - HDFS - [issue]
...It'd be good to hook up datanode metrics for # (blocks/bytes) (cached/uncached/failed to cache) over different time windows (eternity/1hr/10min/1min)....
http://issues.apache.org/jira/browse/HDFS-5320    Author: Andrew Wang, 2013-11-13, 13:47
[HDFS-5495] Remove further JUnit3 usages from HDFS - HDFS - [issue]
...We're trying to move away from junit3 in hadoop to junit4. One easy way of testing for this is something like the following:-> % ack junit.framework -lhadoop-hdfs/src/test/java/org/apache...
http://issues.apache.org/jira/browse/HDFS-5495    Author: Andrew Wang, 2013-11-13, 13:47
[HDFS-5467] Remove tab characters in hdfs-default.xml - HDFS - [issue]
...The retrycache parameters are indented with tabs rather than the normal 2 spaces....
http://issues.apache.org/jira/browse/HDFS-5467    Author: Andrew Wang, 2013-11-13, 13:47
[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
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