Configuring Topology Event Logging
Event logging sends events (tuples) from each component to an internal eventlogger bolt.
Event logging is disabled by default, due to a slight performance degradation associated with eventlogger tasks.
To enable event logging, set the
to a non-zero value when submitting your topology. You can set the property globally in the
storm.yaml file, or use the command line. For more information
topology.eventlogger.executors and other property settings, see
Configuring Apache Storm for Production Environments.