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https://issues.apache.org/jira/browse/HDFS-15980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17322539#comment-17322539
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Zheng Shao commented on HDFS-15980:
-----------------------------------
There are 3 issues:
# The metric names in the tests were incorrect;
# The tests only checked the metrics of DataNode 0, but one of the metrics,
PacketsSlowWriteToMirror, is only updated on 2 of the 3 DataNodes, so this
created an indeterministic failure.
# The metric PacketsSlowWriteToOsCache was not updated in the test due to the
fact that the size of the file was smaller than
BlockReceiver.CACHE_DROP_LAG_BYTES
> Fix tests for HDFS-15754 Create packet metrics for DataNode
> -----------------------------------------------------------
>
> Key: HDFS-15980
> URL: https://issues.apache.org/jira/browse/HDFS-15980
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Priority: Trivial
>
> HDFS-15754 introduces 4 new metrics in DataNodeMetrics. However the test
> associated with the patch has some bugs. This issue is to fix those bugs in
> the tests.
> Please note that the non-test code of HDFS-15754 worked fine without any bugs.
>
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