Troubleshooting tools

In order to troubleshoot an HBase cluster, besides a solid knowledge of the cluster you are operating, the tools you use are also important. We would like to recommend the following troubleshooting tools:

  • ps: This can be used to find the top process that used the most memory and CPU
  • ClusterSSH tool: This tool is used to control multiple SSH sessions simultaneously
  • jps: This tool shows the Java processes for the current user
  • jmap: This tool prints the Java heap summary
  • jstat: This is the Java Virtual Machine statistics monitoring tool
  • hbase hbck: This tool is used for checking and repairing region consistency and table integrity
  • hadoop fsck: This tool is used for checking HDFS consistency

We will describe sample usage of these tools, ...

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