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https://issues.apache.org/jira/browse/HDFS-9536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159789#comment-15159789
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Tsz Wo Nicholas Sze commented on HDFS-9536:
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In LinkArgs, src and dst are both absolute paths so that it wastes a lot of
memory to store the common directory prefix. We should be able to break them
into blockId, srcRelativeDir, srcRoot and dstRoot. Then, we can compute src
from blockId, srcRelativeDir and srcRoot, and dst from blockId and dstRoot.
> OOM errors during parallel upgrade to Block-ID based layout
> -----------------------------------------------------------
>
> Key: HDFS-9536
> URL: https://issues.apache.org/jira/browse/HDFS-9536
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
>
> This is a follow-up jira for the OOM errors observed during parallel upgrade
> to Block-ID based datanode layout using HDFS-8578 fix.
> more clue
> [here|https://issues.apache.org/jira/browse/HDFS-8578?focusedCommentId=15042012&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15042012]
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