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From Chris Nauroth <cnaur...@hortonworks.com>
Subject Re: Can't run rebalancer because it thinks another is running
Date Tue, 05 Jan 2016 22:23:27 GMT
If this is an Ambari-managed cluster that was transitioned from non-HA to running in HA mode,
then you might be interested in a known Ambari bug:

https://issues.apache.org/jira/browse/AMBARI-13946

If your hdfs-site.xml contains the "non-HA properties" described in that issue, then a viable
workaround would be to remove those properties.

--Chris Nauroth

From: Anu Engineer <aengineer@hortonworks.com<mailto:aengineer@hortonworks.com>>
Date: Monday, January 4, 2016 at 3:47 PM
To: Marcin Tustin <mtustin@handybook.com<mailto:mtustin@handybook.com>>, "user@hadoop.apache.org<mailto:user@hadoop.apache.org>"
<user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
Subject: Re: Can't run rebalancer because it thinks another is running

Balancer writes the hostname to a file called  "/system/balancer.id"  if you check that file
you should be able to see where the other balancer is running.

Thanks
Anu


From: Marcin Tustin <mtustin@handybook.com<mailto:mtustin@handybook.com>>
Date: Wednesday, December 30, 2015 at 4:32 PM
To: "user@hadoop.apache.org<mailto:user@hadoop.apache.org>" <user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
Subject: Can't run rebalancer because it thinks another is running

Hi,

I'm running HDFS in HA mode. I can't run the rebalancer because I get this message:

java.io.IOException: Another Balancer is running..  Exiting ...
Dec 31, 2015 12:22:09 AM Balancing took 1.159 seconds

Any suggestions as to why that might be; and if it's the obvious that it's running elsewhere,
how would I figure out where?

Thanks,
Marcin

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