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[HDFS-3599] Better expose when under-construction files are preventing DN decommission - HDFS - [issue]
...Filing on behalf of Konstantin Olchanski:I have been trying to decommission a data node, but the processstalled. I followed the correct instructions, observed my nodelisted in "Decommissioni...
http://issues.apache.org/jira/browse/HDFS-3599    Author: Todd Lipcon, 2014-03-29, 04:21
[HDFS-2282] Semi-harmless race between block reports and block invalidation - HDFS - [issue]
...In the 0.20.203 codebase, block reports are not synchronized in any way against mutations to the actual file structure on disk. If a file is removed from a directory while the block report i...
http://issues.apache.org/jira/browse/HDFS-2282    Author: Todd Lipcon, 2014-03-19, 23:07
[HDFS-3751] DN should log warnings for lengthy disk IOs - HDFS - [issue]
...Occasionally failing disks or other OS-and-below issues cause a single IO to take tens of seconds, or even minutes in the case of failures. This often results in timeout exceptions at the cl...
http://issues.apache.org/jira/browse/HDFS-3751    Author: Todd Lipcon, 2014-03-17, 17:19
[HDFS-4301] 2NN image transfer timeout problematic - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-4301    Author: Todd Lipcon, 2014-03-08, 01:02
[HDFS-2551] fuse-dfs's close() is asynchronous - HDFS - [issue]
...FUSE's "release" operation is called asynchronously when a file is closed from userspace. This means that, if a program writes a file, closes it, and immediately re-opens it, it might not su...
http://issues.apache.org/jira/browse/HDFS-2551    Author: Todd Lipcon, 2014-03-03, 21:27
Re: confirm expected HA behavior - HDFS - [mail # dev]
...Hi Arpit,The issue here is that our transaction log is not a proper "write-aheadlog". In fact, it is a "write-behind" log of sorts -- our generaloperations look something like:- lock namespa...
   Author: Todd Lipcon, 2014-02-07, 19:48
Re: [VOTE] Merge HDFS-5698 Use protobuf to serialize / deserialize FSImage to trunk - HDFS - [mail # dev]
...One question - what's the intention with this work with regard to branch-2?Do you plan to merge it to branch-2, and if so, are you thinking for 2.4 orlater?I'm a little afraid of the diverge...
   Author: Todd Lipcon, 2014-01-30, 23:19
[HDFS-4305] Add a configurable limit on number of blocks per file, and min block size - HDFS - [issue]
...We recently had an issue where a user set the block size very very low and managed to create a single file with hundreds of thousands of blocks. This caused problems with the edit log since ...
http://issues.apache.org/jira/browse/HDFS-4305    Author: Todd Lipcon, 2014-01-28, 17:26
[HDFS-5790] LeaseManager.findPath is very slow when many leases need recovery - HDFS - [issue]
...We recently saw an issue where the NN restarted while tens of thousands of files were open. The NN then ended up spending multiple seconds for each commitBlockSynchronization() call, spendin...
http://issues.apache.org/jira/browse/HDFS-5790    Author: Todd Lipcon, 2014-01-27, 23:04
[HDFS-2994] If lease soft limit is recovered successfully the append can fail - HDFS - [issue]
...I saw the following logs on my test cluster:2012-02-22 14:35:22,887 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: startFile: recover lease [Lease.  Holder: DFSClient_attempt...
http://issues.apache.org/jira/browse/HDFS-2994    Author: Todd Lipcon, 2014-01-07, 18:42
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