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Konstantin Shvachko commented on HDFS-7740: ------------------------------------------- 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)