Daniel Ma created HDFS-16094:
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Summary: NameNode start failed owing to daemon pid file is not
cleared in some exception senario
Key: HDFS-16094
URL: https://issues.apache.org/jira/browse/HDFS-16094
Project: Hadoop HDFS
Issue Type: Improvement
Components: scripts
Affects Versions: 3.3.1
Reporter: Daniel Ma
NameNode start failed owing to daemon pid file is not cleared in some exception
senario, but there is no useful information in log to trouble shoot as below.
{code:java}
//代码占位符
hadoop_error "${daemonname} is running as process $(cat "${daemon_pidfile}")
{code}
but actually, the process is not running as the error msg details above.
Therefore, some more explicit information should be print in error log to guide
users to clear the pid file and where the pid file location is.
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