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https://issues.apache.org/jira/browse/HDFS-10876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15507539#comment-15507539
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Wei-Chiu Chuang commented on HDFS-10876:
----------------------------------------
INFO may be fine.
However, I am seeing an IOE in balancer that disrupts normal balancer
operation. It only occurs after several hours of balancing.
2016-05-14 08:56:27,636 WARN [pool-2302-thread-7] balancer.Dispatcher
(Dispatcher.java:dispatch(325)) - Failed to move blk_1550828018_1100035582559
with size=167 from 10.17.1.1:1004:DISK to 10.17.1.2:1004:DISK through
10.17.1.1:1004: Can't re-compute encryption key for nonce, since the required
block key (keyID=-327392027) doesn't exist. Current key: -327392024
Balancer aborts after five iterations if no blocks are moved. If you make it
DEBUG it's going to be really hard to tell what's going on. From a support
perspective it's going to generated many support tickets.
> Dispatcher#dispatch should log IOException stacktrace
> -----------------------------------------------------
>
> Key: HDFS-10876
> URL: https://issues.apache.org/jira/browse/HDFS-10876
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Affects Versions: 2.6.0
> Reporter: Wei-Chiu Chuang
> Assignee: Manoj Govindassamy
> Priority: Trivial
> Labels: newbie
> Attachments: HDFS-10876.001.patch
>
>
> This error logging should be improved. A warning log should record the
> stacktrace as well.
> {code:title=Dispatcher#dispatch}
> try {
> ...
> } catch (IOException e) {
> LOG.warn("Failed to move " + this + ": " + e.getMessage());
> ...
> }
> {code}
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