WebSphere Message Brokers
File: au14200_
Writer: Jane Brockbank

Reference topic

This build: July 31, 2007 21:39:16

WebSphere MQ facilities

WebSphere Message Broker components depend on WebSphere MQ resources in many ways. You can therefore gain valuable information from the WebSphere MQ logs and events.

WebSphere MQ logs

The WebSphere MQ product logs can be very useful in diagnosing errors that occur in your broker domain. For example, if the Configuration Manager cannot communicate with a broker, the channels that connect them might be wrongly configured, or experiencing network problems.

On distributed systems, operational messages in a user-readable format (such as queue manager started), are written to the error logs in the errors subdirectory of the queue manager's subdirectory.

FFST files

First Failure Support Technology (FFST) records are normally severe, unrecoverable errors, and indicate either a configuration problem with the system or a WebSphere MQ internal error. FFST files are named AMQnnnnn.mm.FDC, where nnnnn is the ID of the process that is reporting the error, and mm is a sequence number. On Windows, records are written to the install_dir\errors directory. Operational messages and FFST records are also written to the Event log. On UNIX and Linux systems, records are written to the /var/mqm/errors directory. WebSphere MQ writes one line for each FFST to the syslog containing the name of the FFST file, but no operational messages.

WebSphere MQ events

WebSphere MQ provides information about errors, warnings, and other significant occurrences in queue managers in the form of instrumentation event messages.

You can activate event activity using the MQSC or PCF interfaces in three areas:
  • Queue manager events
  • Performance events
  • Channel events

When active, these event messages are sent to event queues that can be monitored or triggered. You might find it appropriate to activate WebSphere MQ events when you are investigating the performance, or unexpected behavior, of your WebSphere Message Broker broker domain.

Related reference
WebSphere MQ logs
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This build: July 31, 2007 21:39:16

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