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https://issues.apache.org/jira/browse/HDFS-16062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17397273#comment-17397273
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[email protected] commented on HDFS-16062:
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很抱歉您发送的邮件被退回，以下是该邮件的相关信息：
被退回邮件 主 题：[jira] [Commented] (HDFS-16062) When a DataNode hot reload
configuration, JMX will block for a long time
时 间：2021-08-11 16:42:00.0
无法发送到 [1][email protected]
退信原因 连接[10.56.8.103]失败:Couldn't connect to host, port: 10.56.8.103, 25;
timeout 60000,稍后重试
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[1] mailto:[email protected]
> When a DataNode hot reload configuration, JMX will block for a long time
> ------------------------------------------------------------------------
>
> Key: HDFS-16062
> URL: https://issues.apache.org/jira/browse/HDFS-16062
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: JiangHua Zhu
> Assignee: JiangHua Zhu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When executing the reconfig command on the DataNode, for example:
> hdfs dfsadmin -reconfig datanode hadoopxxxx.jd.163.org:8025 start
> At this time, the JMX of the DataNode is requested. At this time, JMX will
> still block after a long time.
> When this happens, it is mainly caused by some disk exceptions (such as disk
> unavailability) on the DataNode. At this time, DataNode#JMX will block.
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