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https://issues.apache.org/jira/browse/HBASE-8803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13706349#comment-13706349
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Nick Dimiduk commented on HBASE-8803:
-------------------------------------
For instance, here's a recent run of {{time
/usr/lib/hbase/bin/rolling-restart.sh --rs-only --graceful}} on this cluster of
9 RS's that took 30+ minutes.
{noformat}
13/07/10 23:49:33 INFO region_mover: Moving region 1028785192 (1 of 1) to
server=XXXXXX,60020,1373499860198
NativeException: org.apache.hadoop.hbase.NotServingRegionException:
org.apache.hadoop.hbase.NotServingRegionException: Region is not online:
-ROOT-,,0
at
org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:3491)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.getClosestRowBefore(HRegionServer.java:2186)
at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:340)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1426)
getTable at /usr/lib/hbase/bin/region_mover.rb:74
isSuccessfulScan at /usr/lib/hbase/bin/region_mover.rb:133
unloadRegions at /usr/lib/hbase/bin/region_mover.rb:350
call at org/jruby/RubyProc.java:270
call at org/jruby/RubyProc.java:224
{noformat}
As far as I can tell, the ROOT region was never unavailable; I think it's a
race condition in AM.
> region_mover.rb should move multiple regions at a time
> ------------------------------------------------------
>
> Key: HBASE-8803
> URL: https://issues.apache.org/jira/browse/HBASE-8803
> Project: HBase
> Issue Type: Bug
> Components: Usability
> Affects Versions: 0.98.0, 0.94.8, 0.95.1
> Reporter: Jean-Marc Spaggiari
> Assignee: Jean-Marc Spaggiari
> Fix For: 0.98.0, 0.95.2, 0.94.10
>
> Attachments: HBASE-8803-v0-trunk.patch, HBASE-8803-v1-0.94.patch,
> HBASE-8803-v1-trunk.patch, HBASE-8803-v2-0.94.patch, HBASE-8803-v2-0.94.patch
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> When there is many regions in a cluster, rolling_restart can take hours
> because region_mover is moving the regions one by one.
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