5.5.1. HBasemaster process down alert

This alert is triggered if the HBase master processes cannot be confirmed to be up and listening on the network for the configured critical threshold, given in seconds. It uses the Nagios check_tcp plugin.

5.5.1.1. Potential causes

The HBase master process is down
The HBase master has shut itself down because there were problems in the dependent services, ZooKeeper or HDFS
The Nagios server cannot connect to the HBase master through the network

5.5.1.2. Possible remedies

Check the dependent services.
Look at the master log files (usually /var/log/hbase/*.log) for further information
Look at the configuration files (/etc/hbase/conf)
Use ping to check the network connection between the Nagios server and the HBase master
Restart the master

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