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https://issues.apache.org/jira/browse/HDFS-4261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547034#comment-13547034
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Junping Du commented on HDFS-4261:
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Hi Eli, with v7 patch, TestBalancerWithNodeGroup can always be successful on my
local env, and I cannot reproduce ATM and Chris' issue (I tried 30+ times on my
env already). I think at least 4 issues are identified and fixed for balancer
here:
1. NoChangeIterations (for counting iteration of no block movement) is not
working before. Comparing with branch-1, it seems to be involved by Namenode
Federation.
2. balancer's Balancing policy is static so we need to cleanup (reset) in every
iteration of balancing although we create a new balancer instance.
3. checkReplicaPlacementPolicy() issue which is identified by ATM.
4. the loop in dispatchBlocks() could be infinite in some occasional cases.
+1 on adding timeout annotation, I will add it in v8 patch.
> TestBalancerWithNodeGroup times out
> -----------------------------------
>
> Key: HDFS-4261
> URL: https://issues.apache.org/jira/browse/HDFS-4261
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer
> Affects Versions: 1.0.4, 1.1.1, 2.0.2-alpha
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Junping Du
> Fix For: 3.0.0
>
> Attachments: HDFS-4261.patch, HDFS-4261-v2.patch, HDFS-4261-v3.patch,
> HDFS-4261-v4.patch, HDFS-4261-v5.patch, HDFS-4261-v6.patch,
> HDFS-4261-v7.patch, jstack-mac-18567, jstack-win-5488,
> org.apache.hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup-output.txt.mac,
>
> org.apache.hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup-output.txt.win
>
>
> When I manually ran TestBalancerWithNodeGroup, it always timed out in my
> machine. Looking at the Jerkins report [build
> #3573|https://builds.apache.org/job/PreCommit-HDFS-Build/3573//testReport/org.apache.hadoop.hdfs.server.balancer/],
> TestBalancerWithNodeGroup somehow was skipped so that the problem was not
> detected.
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