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Posted to hdfs-issues@hadoop.apache.org by "Yanlei Yu (Jira)" <ji...@apache.org> on 2022/10/12 11:07:00 UTC
[jira] [Commented] (HDFS-16765) "hdfs namenode -rollingUpgrade started" has long execution time
[ https://issues.apache.org/jira/browse/HDFS-16765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17616359#comment-17616359 ]
Yanlei Yu commented on HDFS-16765:
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This is normal
Normal start and stop command is used in the namenode or datanode: sbin/hadoop - daemon. Sh start | stop the namenode | datanode
In hadoop-daemon.sh, the final execution logic is: nohup nice -n $HADOOP_NICENESS $hdfsScript --config $HADOOP_CONF_DIR $command "$@" > "$log" 2>&1 < /dev/null &
Look at rolling upgrade start namnode command: bin/hdfs namenode - rollingUpgrade started, actually also is to use bin/hdfs, just no nohup to the background
Therefore, it is normal that the bin/hdfs namode -rollingUpgrade started command does not exit when the rolling upgrade starts. The bin/hdfs command is used in the end, just like the normal start command.
You can have it run in the background, like this:{{{}nohup bin/hdfs namenode {}}}{{-rollingUpgrade}} {{started > logs/nn1RollingUpgrade.log 2>&1 & }}
> "hdfs namenode -rollingUpgrade started" has long execution time
> -------------------------------------------------------------------
>
> Key: HDFS-16765
> URL: https://issues.apache.org/jira/browse/HDFS-16765
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: rolling upgrades
> Affects Versions: 3.3.4
> Reporter: Haobetter
> Priority: Major
>
> I upgraded version 3.2.1 to version 3.3.4 and executed "HDFS namode -rollingUpgrade Started", which did not stop after 10 hours. I don't think that's too long.。
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