Renukaprasad C created HDFS-15932:
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Summary: Improve the balancer error message when process exits
abnormally.
Key: HDFS-15932
URL: https://issues.apache.org/jira/browse/HDFS-15932
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Renukaprasad C
Assignee: Renukaprasad C
The HDFS balancer exits abnormally. The content of the pid file is not cleaned
up, and the new balancer cannot be started.
Start the balancer (start-balancer.sh threshold 5)
Kill the balancer process (kill -9 <Balancer PID>)
Re-execute the balancer, there will be an error message.
-- Balancer is running as process xxxx. Stop it first.
(But process already stopped, error message can be more detailed)
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