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From Rohith Sharma K S <rohithsharm...@huawei.com>
Subject RE: Can not execute failover for RM HA
Date Tue, 10 Feb 2015 10:57:03 GMT
Currently automatic failover is not supported by YARN. This is open issue in Yarn
Refer : https://issues.apache.org/jira/i#browse/YARN-1177

Thanks & Regards
Rohith Sharma K S

From: 郝东 [mailto:donhoff_h@163.com]
Sent: 10 February 2015 16:12
To: user@hadoop.apache.org
Subject: Can not execute failover for RM HA

I just set up ResourceManager HA. Both of the resourcemanagers started correctly. When I killed
the active one, the other became active. But when I used the following command to do a manual
failover, I got exceptions. I don't know what cause this problem. Could anyone help me ? Many
Thanks!

Command:
yarn rmadmin -failover rm1 rm2

Exceptions:
Exception in thread "main" java.lang.UnsupportedOperationException: RMHAServiceTarget doesn't
have a corresponding ZKFC address
    at org.apache.hadoop.yarn.client.RMHAServiceTarget.getZKFCAddress(RMHAServiceTarget.java:51)
    at org.apache.hadoop.ha.HAServiceTarget.getZKFCProxy(HAServiceTarget.java:94)
    at org.apache.hadoop.ha.HAAdmin.gracefulFailoverThroughZKFCs(HAAdmin.java:315)
    at org.apache.hadoop.ha.HAAdmin.failover(HAAdmin.java:286)
    at org.apache.hadoop.ha.HAAdmin.runCmd(HAAdmin.java:453)
    at org.apache.hadoop.ha.HAAdmin.run(HAAdmin.java:382)
    at org.apache.hadoop.yarn.client.cli.RMAdminCLI.run(RMAdminCLI.java:318)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at org.apache.hadoop.yarn.client.cli.RMAdminCLI.main(RMAdminCLI.java:434)

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