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Appendix B. System Properties

The following table describes the Java system properties used by the Broker to control various optional behaviours.

The preferred method of enabling these system properties is using the QPID_OPTS environment variable described in the previous section.

Table B.1. System properties

System propertyDefaultPurpose
qpid.broker_heartbeat_timeout_factor2Factor to determine the maximum length of that may elapse between heartbeats being received from the peer before a connection is deemed to have been broken.
qpid.broker_dead_letter_queue_suffix_DLQUsed with the Section 9.4.3, “Alternate Binding” feature. Governs the suffix used when generating a name for a Dead Letter Queue.

If set true, the Broker will produce operational logging messages.


Allows optional Broker features to be disabled. Currently understood feature names are: qpid.jms-selector

Feature names should be comma separated.