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https://issues.apache.org/jira/browse/HDFS-11482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chen Liang updated HDFS-11482:
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Attachment: HDFS-11482.003.patch
v001 and v002 patch were missing the change to one more file. Fixed in v003
patch.
Also, there is potential race condition that can cause the code to loop forever
when choosing a random node. This issue also exists in current NetworkTopology,
tracked in HDFS-11507
> Add storage type demand to into DFSNetworkTopology#chooseRandom
> ---------------------------------------------------------------
>
> Key: HDFS-11482
> URL: https://issues.apache.org/jira/browse/HDFS-11482
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-11482.001.patch, HDFS-11482.002.patch,
> HDFS-11482.003.patch
>
>
> HDFS-11450 adds storage type info into network topology, with on this info we
> may change chooseRandom to take storage type requirement as parameter, only
> checking subtrees required storage type available. This way we avoid blindly
> picking up nodes that are not applicable.
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