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datanode出现 java.io.IOException: Xceiver count 4097 exceeds the limit of concurrent xcievers
hdfs-site.xml修改参数dfs.datanode.max.transfer.threads为8192
<property>
<name>dfs.datanode.max.transfer.threads</name>
<value>8192</value>
<description>
Specifies the maximum number of threads to use for transferring data
in and out of the DN.
</description>
</property>
然后重启hdfs
在hadoop1.x为参数dfs.datanode.max.xcievers
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