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Posted to hdfs-issues@hadoop.apache.org by "xiaojunxiang (Jira)" <ji...@apache.org> on 2024/03/28 06:56:00 UTC
[jira] [Updated] (HDFS-17444) Add getJournalSyncerStatus jmx metrics, to Indicates whether the JournalSyncer thread for the every namespace has enter working state.
[ https://issues.apache.org/jira/browse/HDFS-17444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
xiaojunxiang updated HDFS-17444:
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Summary: Add getJournalSyncerStatus jmx metrics, to Indicates whether the JournalSyncer thread for the every namespace has enter working state. (was: Add getJournalSyncerStarted jmx metrics, to Indicates whether the JournalSyncer thread has been started.)
> Add getJournalSyncerStatus jmx metrics, to Indicates whether the JournalSyncer thread for the every namespace has enter working state.
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-17444
> URL: https://issues.apache.org/jira/browse/HDFS-17444
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.3.4, 3.3.6
> Reporter: xiaojunxiang
> Assignee: xiaojunxiang
> Priority: Major
>
> 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.
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