Can not run HDFS balancer cause metrics already exists

[Sébastien Rebecchi]

Hello

After having added a new node on my HDFS cluster, I try running balancer,
but it always fails with the following error, even after retrying
multiple times during the day, and even after having restarted name node
What should I do to unlock?

Thanks,

Sébastien


ERROR balancer.Balancer: Exiting balancer due an exception
org.apache.hadoop.metrics2.MetricsException: Metrics source Balancer-{HERE
REPLACE BY CLUSTER'S BLOCK POOL ID} already exists!
        at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:152)
        at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:125)
        at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:229)
        at
org.apache.hadoop.hdfs.server.balancer.BalancerMetrics.create(BalancerMetrics.java:52)
        at
org.apache.hadoop.hdfs.server.balancer.Balancer.<init>(Balancer.java:362)
        at
org.apache.hadoop.hdfs.server.balancer.Balancer.doBalance(Balancer.java:824)
        at
org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:868)
        at
org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.run(Balancer.java:975)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:82)
        at
org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:1133)