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https://issues.apache.org/jira/browse/HDFS-11860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16455074#comment-16455074
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Hudson commented on HDFS-11860:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14070 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/14070/])
HDFS-11860. Ozone: SCM: SCMContainerPlacementCapacity#chooseNode (omalley: rev
56966a0535b6cfbd4f3a90124ee7282610b77a87)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/placement/algorithms/SCMContainerPlacementCapacity.java
> Ozone: SCM: SCMContainerPlacementCapacity#chooseNode sometimes does not
> remove chosen node from healthy list.
> -------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-11860
> URL: https://issues.apache.org/jira/browse/HDFS-11860
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Priority: Major
> Fix For: HDFS-7240
>
> Attachments: HDFS-11860-HDFS-7240.001.patch,
> HDFS-11860-HDFS-7240.002.patch
>
>
> This was caught in Jenkins run randomly. After debugging, found the cause is
> the
> logic when two random index happens to be the same below where the node id
> was returned without being removed from the healthy list for next round of
> selection. As a result, there could be duplicated datanodes chosen for the
> pipeline and the machine list size smaller than expected. I will post a fix
> soon.
> {code}
> SCMContainerPlacementCapacity#chooseNode
> // There is a possibility that both numbers will be same.
> // if that is so, we just return the node.
> if (firstNodeNdx == secondNodeNdx) {
> return healthyNodes.get(firstNodeNdx);
> }
> {code}
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