Monitoring Options

There are several monitoring options available to customers:

  • Admin Tool
  • Discovery log file.
  • System State Web Service
  • munin plugin

Admin Tool

The engine’s web interface, at, gives an overview of the engine’s status. For more information on this feature refer to Admin Tool Interface.

Discovery Log File

The engine’s log file is available in the engine’s working directory.named “log”. The Discovery log file is named discovery-n.log where n is the log sequence number, starting at 0. For example, the first log file is named discovery-0.log.

Customers can tail the log file for insight into engine activity.

As of version 2.8.5, the Discovery engine uses the JDK 1.4 logging system. The logging configuration file can be customized according to this system. The engine’s default logging configuration file is located in the engine’s releases directory. To configure custom logging for a specific instance, copy to the appropriate working directory in your engines directory.

For more information on engine installation directories, refer to Recommended Installation Directory Hierarchy.

System State Web Service

The status of the engine is also exposed as a web service at which, if running properly, returns:

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type='text/xsl'
        <true />
        <true />

If the running element’s child has a value of true, then the engine is fully functioning and ready to receive queries.

For more information on the System State web service, refer to System State.

Munin plugin

The Discovery Search Engine exposes a number of data points that are of interest on a web service at /ws/statistics. The statistics exposed are transient, all counters will reset when the engine stops.

For more information on using the munin plugin refer to the description of the Statistics web service.