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Scenario: Timeouts with 'hbase hbck' command in Azure HDInsight

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This article describes troubleshooting steps and possible resolutions for issues when interacting with Azure HDInsight clusters.

Issue

Encounter timeouts with hbase hbck command when fixing region assignments.

Cause

A potential cause for timeout issues when you use the hbck command might be that several regions are in the "in transition" state for a long time. You can see those regions as offline in the HBase Master UI. Because a high number of regions are attempting to transition, HBase Master might time out and be unable to bring those regions back online.

Resolution

  1. Sign in to the HDInsight HBase cluster using SSH.

  2. Run hbase zkcli command to connect with Apache ZooKeeper shell.

  3. Run rmr /hbase/regions-in-transition or rmr /hbase-unsecure/regions-in-transition command.

  4. Exit from hbase zkcli shell by using exit command.

  5. From the Apache Ambari UI, restart the Active HBase Master service.

  6. Run the hbase hbck -fixAssignments command.

  7. Monitor the HBase Master UI "region in transition" that section to make sure no region gets stuck.

Next steps

If you didn't see your problem or are unable to solve your issue, visit one of the following channels for more support:

  • Get answers from Azure experts through Azure Community Support.

  • Connect with @AzureSupport - the official Microsoft Azure account for improving customer experience. Connecting the Azure community to the right resources: answers, support, and experts.

  • If you need more help, you can submit a support request from the Azure portal. Select Support from the menu bar or open the Help + support hub. For more detailed information, review How to create an Azure support request. Access to Subscription Management and billing support is included with your Microsoft Azure subscription, and Technical Support is provided through one of the Azure Support Plans.