whbing commented on PR #5203:
URL: https://github.com/apache/hadoop/pull/5203#issuecomment-1455937257
@Jing9 @Happy-shi hello, anyone follow up on this issue? I had the same
problem with balancer.
```java
2023-03-06 17:40:53,264 ERROR
org.apache.hadoop.hdfs.server.balancer.Balancer: Exiting balancer due an
exception
org.apache.hadoop.metrics2.MetricsException: Metrics source
Balancer-BP-332003681-10.196.164.22-1648632173322 already exists!
at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:225)
at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:198)
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:229)
at
org.apache.hadoop.hdfs.server.balancer.BalancerMetrics.create(BalancerMetrics.java:55)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.<init>(Balancer.java:344)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.doBalance(Balancer.java:809)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:847)
at
org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.run(Balancer.java:952)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:1102)
```
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