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Re: when datanode will delete these invalidate blocks? - HDFS - [mail # dev]
...Try looking in the heartbeat code on the NN and DN, it should clear things up. The namenode sends these block invalidations to the DN on the DN heartbeat response. The DN then deletes the bl...
   Author: Andrew Wang, 2013-11-19, 05:46
[HDFS-5524] NPE during Namenode startup in Server#getNumConnections - HDFS - [issue]
...Saw this stacktrace while starting up a trunk namenode, maybe a race between starting the RPC server and the metrics system?13/11/18 14:49:32 ERROR lib.MethodMetric: Error invoking method nu...
http://issues.apache.org/jira/browse/HDFS-5524    Author: Andrew Wang, 2013-11-19, 00:57
[expand - 3 more] - Re: HDFS read/write data throttling - HDFS - [mail # dev]
...https://issues.apache.org/jira/browse/HDFS-5499   On Mon, Nov 18, 2013 at 10:46 AM, Jay Vyas  wrote:  ...
   Author: Andrew Wang, 2013-11-18, 21:25
[HDFS-5509] TestPathBasedCacheRequests#testReplicationFactor is flaky - HDFS - [issue]
...Test flakes out sometimes with the following:Running org.apache.hadoop.hdfs.server.namenode.TestPathBasedCacheRequestsTests run: 9, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 72.191 s...
http://issues.apache.org/jira/browse/HDFS-5509    Author: Andrew Wang, 2013-11-15, 19:10
[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
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