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https://issues.apache.org/jira/browse/HBASE-10638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13915935#comment-13915935
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Ted Yu commented on HBASE-10638:
--------------------------------
Here is sample output from the script with patch:
{code}
2014-02-28 04:38:05,383 INFO [main] zookeeper.ZooKeeper: Client
environment:user.name=hbase
2014-02-28 04:38:05,383 INFO [main] zookeeper.ZooKeeper: Client
environment:user.home=/home/hbase
2014-02-28 04:38:05,384 INFO [main] zookeeper.ZooKeeper: Client
environment:user.dir=/home/hbase
2014-02-28 04:38:05,385 INFO [main] zookeeper.ZooKeeper: Initiating client
connection, connectString=c6401.ambari.apache.org:2181 sessionTimeout=30000
watcher=hconnection-0x3bbc58a7, quorum=c6401.ambari.apache.org:2181,
baseZNode=/hbase-unsecure
2014-02-28 04:38:05,421 INFO [main] zookeeper.RecoverableZooKeeper: Process
identifier=hconnection-0x3bbc58a7 connecting to ZooKeeper
ensemble=c6401.ambari.apache.org:2181
2014-02-28 04:38:05,433 INFO [main-SendThread(c6401.ambari.apache.org:2181)]
zookeeper.ClientCnxn: Opening socket connection to server
c6401.ambari.apache.org/192.168.64.101:2181. Will not attempt to authenticate
using SASL (unknown error)
2014-02-28 04:38:05,441 INFO [main-SendThread(c6401.ambari.apache.org:2181)]
zookeeper.ClientCnxn: Socket connection established to
c6401.ambari.apache.org/192.168.64.101:2181, initiating session
2014-02-28 04:38:05,471 INFO [main-SendThread(c6401.ambari.apache.org:2181)]
zookeeper.ClientCnxn: Session establishment complete on server
c6401.ambari.apache.org/192.168.64.101:2181, sessionid = 0x1446c174f56005e,
negotiated timeout = 30000
Valid region move targets:
No regions were moved - there was no server available
{code}
> Improve error message when there is no region server available for move
> -----------------------------------------------------------------------
>
> Key: HBASE-10638
> URL: https://issues.apache.org/jira/browse/HBASE-10638
> Project: HBase
> Issue Type: Improvement
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 10638-v1.txt
>
>
> When there is no region server available to move regions to, we would see:
> {code}
> Valid region move targets:
> TypeError: can't convert nil into String
> __for__ at /usr/lib/hbase/bin/region_mover.rb:336
> call at org/jruby/RubyProc.java:270
> call at org/jruby/RubyProc.java:220
> each at
> file:/usr/lib/hbase/lib/jruby-complete-1.6.5.jar!/builtin/java/java.util.rb:7
> unloadRegions at /usr/lib/hbase/bin/region_mover.rb:333
> (root) at /usr/lib/hbase/bin/region_mover.rb:471
> {code}
> Better error message / exit code should be provided.
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