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https://issues.apache.org/jira/browse/HDFS-15556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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huhaiyang updated HDFS-15556:
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Description:
In our cluster, the NameNode appears NPE when processing lifeline messages sent
by the DataNode, which will cause an maxLoad exception calculated by NN.
In choose DataNode because DataNode is identified as busy and unable to
allocate available nodes, program loop execution results in high CPU and
reduces the processing performance of the cluster.
was:
In our cluster, the NameNode appears NPE when processing lifeline messages sent
by the DataNode, which will cause an maxLoad exception calculated by NN.
In choose DataNode because DataNode is identified as busy and unable to
allocate available nodes, program loop execution results in high CPU and
reduces the processing performance of the cluster.
> Fix NPE in DatanodeDescriptor#updateStorageStats when handle DN Lifeline
> ------------------------------------------------------------------------
>
> Key: HDFS-15556
> URL: https://issues.apache.org/jira/browse/HDFS-15556
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.2.0
> Reporter: huhaiyang
> Priority: Critical
>
> In our cluster, the NameNode appears NPE when processing lifeline messages
> sent by the DataNode, which will cause an maxLoad exception calculated by NN.
> In choose DataNode because DataNode is identified as busy and unable to
> allocate available nodes, program loop execution results in high CPU and
> reduces the processing performance of the cluster.
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