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Anu Engineer commented on HDFS-12098: ------------------------------------- @Weiwei yang, Can you please share your repro steps once again ? or look at this test patch that I have created ? I have added a disable SCM call, when tests run, I can see we do not hit the SCM. {code} java.net.SocketTimeoutException: Call From hw11767.home/192.168.29.224 to 0.0.0.0:58880 failed on socket timeout exception: java.net.SocketTimeoutException: 1000 millis timeout while waiting for channel to be ready for read. ch : java.nio.channels {code} However, I am not able to see many Datanode state machine threads. Please see the attached snapshot from my profiler. I have also attached a test case that I developed to simulate and debug this case. Thanks Anu > Ozone: Datanode is unable to register with scm if scm starts later > ------------------------------------------------------------------ > > Key: HDFS-12098 > URL: https://issues.apache.org/jira/browse/HDFS-12098 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: datanode, ozone, scm > Reporter: Weiwei Yang > Assignee: Weiwei Yang > Priority: Critical > Attachments: HDFS-12098-HDFS-7240.001.patch, > HDFS-12098-HDFS-7240.002.patch, Screen Shot 2017-07-11 at 4.58.08 PM.png, > thread_dump.log > > > Reproducing steps > # Start datanode > # Wait and see datanode state, it has connection issues, this is expected > # Start SCM, expecting datanode could connect to the scm and the state > machine could transit to RUNNING. However in actual, its state transits to > SHUTDOWN, datanode enters chill mode. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org