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[HDFS-3519] Checkpoint upload may interfere with a concurrent saveNamespace - HDFS - [issue]
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...TestStandbyCheckpoints failed in precommit build 2620 due to the following issue: both nodes were in Standby state, and configured to checkpoint "as fast as possible" NN1 starts to save its ...
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http://issues.apache.org/jira/browse/HDFS-3519
Author: Todd Lipcon,
2013-05-09, 23:44
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[HDFS-3962] NN should periodically check writability of 'required' journals - HDFS - [issue]
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...Currently, our HA design ensures "write fencing" by having the failover controller call a fencing script before transitioning a new node to active. However, if the fencing script is based on...
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http://issues.apache.org/jira/browse/HDFS-3962
Author: Todd Lipcon,
2013-05-03, 16:40
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Re: DistributedFileSystem.listStatus() - Why does it do partial listings then assemble? - HDFS - [mail # dev]
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...Hi Brad, The reasoning is that the NameNode locking is somewhat coarse grained. In older versions of Hadoop, before it worked this way, we found that listing large directories (eg with...
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Author: Todd Lipcon,
2013-05-02, 16:28
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[HDFS-4485] HDFS-347: DN should chmod socket path a+w - HDFS - [issue]
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...In cluster-testing HDFS-347, we found that in clusters where the MR job doesn't run as the same user as HDFS, clients wouldn't use short circuit read because of a 'permission denied' error c...
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http://issues.apache.org/jira/browse/HDFS-4485
Author: Todd Lipcon,
2013-05-02, 07:44
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Re: Heads up - Snapshots feature merge into trunk - HDFS - [mail # dev]
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...On Fri, Apr 19, 2013 at 3:36 AM, Aaron T. Myers wrote: Agreed. The cases of WAFL/ZFS were brought up -- in those file systems, even if users may take snapshots, they're done usin...
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Author: Todd Lipcon,
2013-04-24, 20:25
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[HDFS-2579] Starting delegation token manager during safemode fails - HDFS - [issue]
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...I noticed this on the HA branch, but it seems to actually affect non-HA branch 0.23 if security is enabled. When the NN starts up, if security is enabled, we start the delegation token secre...
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http://issues.apache.org/jira/browse/HDFS-2579
Author: Todd Lipcon,
2013-04-12, 14:58
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[HDFS-1013] Miscellaneous improvements to HTML markup for web UIs - HDFS - [issue]
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...The Web UIs have various bits of bad markup (eg missing <head> sections, some pages missing CSS links, inconsistent td vs th for table headings). We should fix this up....
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http://issues.apache.org/jira/browse/HDFS-1013
Author: Todd Lipcon,
2013-04-11, 01:21
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[HDFS-4301] 2NN image transfer timeout problematic - HDFS - [issue]
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...HDFS-1490 added a timeout on image transfer. But, it seems like the timeout is actually applying to the entirety of the image transfer operation. So, if the image or edits are large (multipl...
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http://issues.apache.org/jira/browse/HDFS-4301
Author: Todd Lipcon,
2013-04-10, 23:55
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[HDFS-4643] Fix flakiness in TestQuorumJournalManager - HDFS - [issue]
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...TestQuorumJournalManager can occasionally fail if two consecutive test cases pick the same port number for the JournalNodes. In this case, sometimes an IPC client can be cached from a previo...
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http://issues.apache.org/jira/browse/HDFS-4643
Author: Todd Lipcon,
2013-04-10, 15:06
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[HDFS-3447] StandbyException should not be logged at ERROR level on server - HDFS - [issue]
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...Currently, the standby NN will log StandbyExceptions at ERROR level any time a client tries to connect to it. So, if the second NN in an HA pair is active, the first NN will spew a lot of th...
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http://issues.apache.org/jira/browse/HDFS-3447
Author: Todd Lipcon,
2013-04-08, 22:27
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