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https://issues.apache.org/jira/browse/HDFS-8867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662169#comment-14662169
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Jing Zhao commented on HDFS-8867:
---------------------------------
Looks like the issue here is that {{CAPABILITIES_SUPPORTED}} has not been
correctly initialized because the enum {{Capability}} is not loaded?
> Enable optimized block reports
> ------------------------------
>
> Key: HDFS-8867
> URL: https://issues.apache.org/jira/browse/HDFS-8867
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Rushabh S Shah
> Assignee: Daryn Sharp
> Fix For: 2.7.2
>
>
> Opening this ticket on behalf of [~daryn]
> HDFS-7435 introduced a more efficiently encoded block report format designed
> to improve performance and reduce GC load on the NN and DNs. The NN is not
> advertising this capability to the DNs so old-style reports are still being
> used.
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