xuzq created HDFS-15348:
---------------------------

             Summary: [SBN Read] IllegalStateException happened when doing 
failover
                 Key: HDFS-15348
                 URL: https://issues.apache.org/jira/browse/HDFS-15348
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: xuzq


Standby shutdown when doing failover, and throw IllegalStateException.

`getJournaledEdits` only return `dfs.ha.tail-edits.qjm.rpc.max-txns` edits, 
resulting in failure to replay all edits in `catchupDuringFailover()`.

 

And check `streams.isEmpty()` will be throw this exception in 
`FSEditLog#openForWrite`

The exception like:

 
{code:java}
2020-05-10 09:20:02,235 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode 
IPC Server handler 763 on 8022: Error encountered requiring NN sh
utdown. Shutting down immediately.
java.lang.IllegalStateException: Cannot start writing at txid 173922195318 when 
there is a stream available for read: org.apache.hadoop.hdfs.se
rver.namenode.RedundantEditLogInputStream@47b73995
        at 
org.apache.hadoop.hdfs.server.namenode.FSEditLog.openForWrite(FSEditLog.java:320)
        at 
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startActiveServices(FSNamesystem.java:1352)
        at 
org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.startActiveServices(NameNode.java:1890)
        at 
org.apache.hadoop.hdfs.server.namenode.ha.ActiveState.enterState(ActiveState.java:61)
        at 
org.apache.hadoop.hdfs.server.namenode.ha.HAState.setStateInternal(HAState.java:64)
        at 
org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.setState(StandbyState.java:49)
        at 
org.apache.hadoop.hdfs.server.namenode.NameNode.transitionToActive(NameNode.java:1763)
        at 
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.transitionToActive(NameNodeRpcServer.java:1605){code}
 



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