stack commented on HBASE-19929:

Ok. Still some timeouts on nightlies. Digging. Thanks for heads-up.

> Call RS.stop on a session expired RS may hang
> ---------------------------------------------
>                 Key: HBASE-19929
>                 URL: https://issues.apache.org/jira/browse/HBASE-19929
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 2.0.0-beta-2
>         Attachments: HBASE-19929-v1.patch, HBASE-19929.patch
> See the discussion in HBASE-19927. The problem is that, for a normal stop we 
> will try to close all the regions and wait until they are all closed. But if 
> the RS has already session expired, master will start the failover work which 
> will move the WAL directory, and then we will be stuck in writing flush 
> marker.

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