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https://issues.apache.org/jira/browse/HDFS-13198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei Yan updated HDFS-13198:
---------------------------
    Attachment: HDFS-13198.004.patch

> RBF: RouterHeartbeatService throws out CachedStateStore related exceptions 
> when starting router
> -----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13198
>                 URL: https://issues.apache.org/jira/browse/HDFS-13198
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Wei Yan
>            Assignee: Wei Yan
>            Priority: Minor
>         Attachments: HDFS-13198.000.patch, HDFS-13198.001.patch, 
> HDFS-13198.002.patch, HDFS-13198.003.patch, HDFS-13198.004.patch
>
>
> Exception looks like:
> {code:java}
> 2018-02-23 19:04:56,341 ERROR router.RouterHeartbeatService: Cannot get 
> version for class 
> org.apache.hadoop.hdfs.server.federation.store.MembershipStore: Cached State 
> Store not initialized, MembershipState records not valid
> 2018-02-23 19:04:56,341 ERROR router.RouterHeartbeatService: Cannot get 
> version for class 
> org.apache.hadoop.hdfs.server.federation.store.MountTableStore: Cached State 
> Store not initialized, MountTable records not valid
> Exception in thread "Router Heartbeat Async" java.lang.NullPointerException
> at 
> org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreSerializableImpl.serialize(StateStoreSerializableImpl.java:60)
> at 
> org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreZooKeeperImpl.putAll(StateStoreZooKeeperImpl.java:191)
> at 
> org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreBaseImpl.put(StateStoreBaseImpl.java:75)
> at 
> org.apache.hadoop.hdfs.server.federation.store.impl.RouterStoreImpl.routerHeartbeat(RouterStoreImpl.java:88)
> at 
> org.apache.hadoop.hdfs.server.federation.router.RouterHeartbeatService.updateStateStore(RouterHeartbeatService.java:95)
> at 
> org.apache.hadoop.hdfs.server.federation.router.RouterHeartbeatService.access$000(RouterHeartbeatService.java:43)
> at 
> org.apache.hadoop.hdfs.server.federation.router.RouterHeartbeatService$1.run(RouterHeartbeatService.java:68)
> at java.lang.Thread.run(Thread.java:748){code}
> This is because, during starting the Router, the CachedStateStore hasn't been 
> initialized and cannot serve requests. Although the router will still be 
> started, it would be better to fix the exceptions.



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