[jira] [Created] (YARN-6555) Enable flow context read (& corresponding write) for recovering application with NM restart

["Vrushali C (JIRA)" <ji...@apache.org>]

Vrushali C created YARN-6555:
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             Summary: Enable flow context read (& corresponding write) for recovering application with NM restart 
                 Key: YARN-6555
                 URL: https://issues.apache.org/jira/browse/YARN-6555
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Vrushali C
            Assignee: Vrushali C



If timeline service v2 is enabled and NM is restarted with recovery enabled, then NM fails to start and throws an error as  "flow context can't be null".

This is happening because the flow context did not exist before but now that timeline service v2 is enabled, ApplicationImpl expects it to exist. 

This would also happen even if flow context existed before but since we are not persisting it / reading it during ContainerManagerImpl#recoverApplication, it does not get passed in to ApplicationImpl.


{code}

full stack trace
{code}
2017-05-03 21:51:52,178 FATAL org.apache.hadoop.yarn.server.nodemanager.NodeManager: Error starting NodeManager
java.lang.IllegalArgumentException: flow context cannot be null
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationImpl.<init>(ApplicationImpl.java:104)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationImpl.<init>(ApplicationImpl.java:90)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recoverApplication(ContainerManagerImpl.java:318)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover(ContainerManagerImpl.java:280)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.serviceInit(ContainerManagerImpl.java:267)
        at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
        at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:276)
        at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:588)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:649)
{code}

{code}



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