xiaojunxiang2023 opened a new pull request, #6684: URL: https://github.com/apache/hadoop/pull/6684
The JornalNode JVM process is not immediately in a normal state until the JournalSyncer thread is started. For some management platforms such as Ambari rolling restart JournalNode, we need a jmx metric to determine whether the JournalSyncer thread is started before restarting the next JournalNode. Otherwise, restart too quickly and more than half of JournalNodes will be out of order, causing the NameNode to die. Extra info: The JournalSyncer thread is started when a NameNode requests EditLog information. When i add it , the effect is as follows:  -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
