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Re: data loss after cluster wide power loss - HDFS - [mail # dev]
...For the ext3 bug Colin mentioned, see https://bugzilla.redhat.com/show_bug.cgi?id=592961. This was fixed in 2.6.32 and backported in RHEL 5.4 (or CENTOS). This has more to do with file data ...
   Author: Kihwal Lee, 2013-07-03, 18:57
[HDFS-4840] ReplicationMonitor gets NPE during shutdown - HDFS - [issue]
...TestBlocksWithNotEnoughRacks occasionally fails during test tear down because RaplicationMonitor gets NPE.Seen at https://builds.apache.org/job/Hadoop-Hdfs-trunk/1406/....
http://issues.apache.org/jira/browse/HDFS-4840    Author: Kihwal Lee, 2013-06-28, 00:44
[HDFS-4845] FSEditLogLoader gets NPE while accessing INodeMap in TestEditLogRace - HDFS - [issue]
...TestEditLogRace fails occasionally because it gets NPE from manipulating INodeMap while loading edits....
http://issues.apache.org/jira/browse/HDFS-4845    Author: Kihwal Lee, 2013-06-14, 15:15
Re: Why is FileSystem.createNonRecursive deprecated? - HDFS - [mail # dev]
...It seems the transition within hadoop needs to happen before deprecating FileSystem. I think createNonRecursive() was marked deprecated from the beginning under the assumption that this tran...
   Author: Kihwal Lee, 2013-06-13, 16:49
[HDFS-4867] metaSave NPEs when there are invalid blocks in repl queue. - HDFS - [issue]
...Since metaSave cannot get the inode holding a orphaned/invalid block, it NPEs and stops generating further report. Normally ReplicationMonitor removes them quickly, but if the queue is huge,...
http://issues.apache.org/jira/browse/HDFS-4867    Author: Kihwal Lee, 2013-06-12, 23:46
[HDFS-4890] Stop generating/sending datanode work in standby mode - HDFS - [issue]
...If NN comes up in standby and stays that way, repl queues are empty so no work is generated even though ReplicationMonitor is running. But if an ANN transitions to standby, more work can be ...
http://issues.apache.org/jira/browse/HDFS-4890    Author: Kihwal Lee, 2013-06-06, 22:02
[HDFS-4859] Add timeout in FileJournalManager - HDFS - [issue]
...Due to absence of explicit timeout in FileJournalManager, error conditions that incur long delay (usually until driver timeout) can make namenode unresponsive for long time. This directly af...
http://issues.apache.org/jira/browse/HDFS-4859    Author: Kihwal Lee, 2013-05-30, 16:07
[HDFS-4780] Use the correct relogin method for services - HDFS - [issue]
...A number of components call reloginFromKeytab() before making requests. For StandbyCheckpointer and SecondaryNameNode, where this can be called frequently, it generates many WARN messages li...
http://issues.apache.org/jira/browse/HDFS-4780    Author: Kihwal Lee, 2013-05-29, 15:07
[HDFS-4786] WebHdfsFileSystem hangs on close() - HDFS - [issue]
...When close() is called via fs shoutdown hook, the synchronized method, removeRenewAction() hangs. This is because DelegationTokenRenewer calls DelayQueue.take() inside a synchronized block. ...
http://issues.apache.org/jira/browse/HDFS-4786    Author: Kihwal Lee, 2013-05-06, 14:48
[HDFS-4713] Wrong server principal is used for rpc calls to namenode if HA is enabled - HDFS - [issue]
...When various components are connecting to a namenode in a HA-enabled environment, a wrong server principal may be picked up.  This result in SASL failure, since the client-side used a w...
http://issues.apache.org/jira/browse/HDFS-4713    Author: Kihwal Lee, 2013-04-24, 20:50
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