Hadoop DataNode not starting issue

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/usr/local/hadoop$ jps12628 NodeManager12110 NameNode12533 ResourceManager13335 Jps12376 SecondaryNameNode


googled a lot, solutions as below :

  • reformat namenode
  • clean tmp logs
For my case, it turns out that 50010 port is occupied by other application, stop the application, restart Hadoop, the issue is gone



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