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https://issues.apache.org/jira/browse/HDFS-10602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15400229#comment-15400229
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Xiao Chen commented on HDFS-10602:
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Thanks for working on this, [~linyiqun].
>From the provided log it looks like the rebalancing is bouncing between the 2
>DNs ( 65160 -> 65164, then 65164 -> 65160 in the next iteration). The 3rd DN
>is excluded for the test case.
I don't fully understand the problem, and why changing the rack of the excluded
DN would help in this case. Tried to track down the initial addition of this
test case (HDFS-6798), which was trying to verify the fix of HDFS-6364. It
seems the code has been refactored so no {{getBlockList}} exists in trunk now,
and I would need to further look into this.
In the meantime, [~benoyantony] would you have time to take a look at this and
share your thoughts? Thanks in advance.
> TestBalancer runs timeout intermittently
> ----------------------------------------
>
> Key: HDFS-10602
> URL: https://issues.apache.org/jira/browse/HDFS-10602
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha1
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: HDFS-10602.001.patch
>
>
> As the jira HDFS-10336 has mentioned, the unit test
> {{TestBalancer#testBalancerWithKeytabs}} will runs too slowly sometimes and
> that leads the timeout. The test {{TestBalancer#testUnknownDatanodeSimple}}
> will also has this problem. These two tests both use the method
> {{testUnknownDatanode}}. We can do some optimization for this method.
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