Scenario: Apache Ambari UI shows down hosts and services in Azure HDInsight

  • Article

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

Issue

Apache Ambari UI is accessible, but the UI shows almost all services are down, all hosts showing heartbeat lost.

Cause

In most scenarios, this is an issue with Ambari server not running on the active headnode. Check which headnode is the active headnode and make sure your ambari-server runs on the right one. Don't manually start ambari-server, let failover controller service be responsible for starting ambari-server on the right headnode. Reboot the active headnode to force a failover.

Networking issues can also cause this problem. From each cluster node, see if you can ping headnodehost. There is a rare situation where no cluster node can connect to headnodehost:

$>telnet headnodehost 8440
... No route to host

Resolution

Usually rebooting the active headnode will mitigate this issue. If not please contact HDInsight support team.

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:

  • 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.