5.4.4. HistoryServer process

This host-level alert is triggered if the HistoryServer process cannot be established to be up and listening on the network for the configured critical threshold, given in seconds. It uses the Nagios check_tcp plug-in.

5.4.4.1. Potential causes

HistoryServer process is down or not responding.
HistoryServer is not down but is not listening to the correct network port/address.
Nagios Server cannot connect to the HistoryServer,

5.4.4.2. Possible remedies

Check the HistoryServer is running.
Check for any errors in the HistoryServer logs (/var/log/hadoop/mapred) and restart the HistoryServer, if necessary
Use ping to check the network connection between the Nagios Server and the HistoryServer host.

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