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https://issues.apache.org/jira/browse/HDFS-17927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18086450#comment-18086450
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ASF GitHub Bot commented on HDFS-17927:
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smengcl commented on PR #8517:
URL: https://github.com/apache/hadoop/pull/8517#issuecomment-4634248181
Thanks @boky01 for the review!
> Make TestDiskError.testShutdown use deterministic volume failure injection
> --------------------------------------------------------------------------
>
> Key: HDFS-17927
> URL: https://issues.apache.org/jira/browse/HDFS-17927
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: test
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Labels: pull-request-available
>
> `TestDiskError.testShutdown()` currently drives DataNode shutdown by
> repeatedly creating files until `dn.isDatanodeUp()` becomes false. If
> shutdown does not happen promptly, the test can loop for a long time and
> generate excessive logs.
> Replaces file-create loop with deterministic failure injection for both
> DataNode data dirs, then explicitly runs `dn.checkDiskError()` and waits for
> the DataNode to exit.
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