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https://issues.apache.org/jira/browse/HDFS-7740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14328470#comment-14328470
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Konstantin Shvachko commented on HDFS-7740:
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Hey Yi. The test scenarios sound great.
# I don't think your new tests will work with the ones existing in
TestFileTruncate, because you are restarting the whole cluster.
I would propose to put your new cases into a new file, smth, like
TestTruncateDataNodeRestarting.
# It would be good to start the cluster once in @BeforeClass, and make sure all
DNs are up after each test case. I think this is possible as you do not need to
reformat the cluster after each test. If you need to reformat, then we should
use try-catch to start / stop clusters.
# With DNs restarting one way to accelerate test running time is to shorten
heartbeats, as we did in TestFileTruncate.
> Test truncate with DataNodes restarting
> ---------------------------------------
>
> Key: HDFS-7740
> URL: https://issues.apache.org/jira/browse/HDFS-7740
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Affects Versions: 2.7.0
> Reporter: Konstantin Shvachko
> Assignee: Yi Liu
> Fix For: 2.7.0
>
> Attachments: HDFS-7740.001.patch
>
>
> Add a test case, which ensures replica consistency when DNs are failing and
> restarting.
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