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[HDFS-2949] HA: Add check to active state transition to prevent operator-induced split brain - HDFS - [issue]
...Currently, if the administrator mistakenly calls "-transitionToActive" on one NN while the other one is still active, all hell will break loose. We can add a simple check by having the NN ma...
http://issues.apache.org/jira/browse/HDFS-2949    Author: Todd Lipcon, 2014-06-08, 08:39
[HDFS-3103] HA NN should be able to handle some cases of storage dir recovery on start - HDFS - [issue]
...As a shortcut in developing HA, we elected not to deal with the case of storage directory recovery while HA is enabled. But there are many cases where we can and should handle it. For exampl...
http://issues.apache.org/jira/browse/HDFS-3103    Author: Todd Lipcon, 2014-04-23, 21:25
[HDFS-3969] Small bug fixes and improvements for disk locations API - HDFS - [issue]
...The new disk block locations API has a configurable timeout, but it's used inconsistently: the invokeAll() call to the thread pool assumes the timeout is in seconds, but the RPC timeout is s...
http://issues.apache.org/jira/browse/HDFS-3969    Author: Todd Lipcon, 2014-04-10, 14:12
[HDFS-2686] Remove DistributedUpgrade related code - HDFS - [issue]
...A distributed upgrade framework was introduced long ago in HADOOP-1286 but was only used twice throughout history, and not since 0.17, where it was considered buggy (see HADOOP-3677). This i...
http://issues.apache.org/jira/browse/HDFS-2686    Author: Todd Lipcon, 2014-04-09, 21:11
[HDFS-2688] HA: write tests for quota tracking and HA - HDFS - [issue]
...Quota is one of the areas I suspect we might have bugs in the current state HA implementation. We need to track quotas correctly on the standby so that when a failover occurs, all of the sta...
http://issues.apache.org/jira/browse/HDFS-2688    Author: Todd Lipcon, 2014-04-09, 21:11
[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
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