The Broker supports a variety of queue alerting thresholds. Once configured on a queue, these limits will be periodically written to the log if these limits are breached, until the condition is rectified.
For example, if queue myqueue is configured with a message count alert of
1000, and then owing to a failure of a downstream system messages begin to accumulate on the
queue, the following alerts will be written periodically to the log.
INFO [default:VirtualHostHouseKeepingTask] (queue.NotificationCheck) - MESSAGE_COUNT_ALERT On Queue myqueue - 1272: Maximum count on queue threshold (1000) breached.
Note that queue alerts are soft in nature; breaching the limit will merely cause the alerts to be generated but messages will still be accepted to the queue.
Table E.1. Queue Alerts
| Alert Name | Alert Format and Purpose |
|---|---|
| MESSAGE_COUNT_ALERT | MESSAGE_COUNT_ALERT On Queue queuename -
number of messages: Maximum count on queue threshold
(limit) breached. |
|
The number of messages on the given queue has breached its configured limit. | |
| MESSAGE_SIZE_ALERT | MESSAGE_SIZE_ALERT On Queue queuename
-message size : Maximum message size threshold
(limit) breached. [Message ID=message
id] |
|
The size of an individual messages has breached its configured limit. | |
| QUEUE_DEPTH_ALERT | QUEUE_DEPTH_ALERT On Queue queuename -
total size of all messages on queue : Maximum queue depth
threshold (limit) breached. |
|
The total size of all messages on the queue has breached its configured limit. | |
| MESSAGE_AGE_ALERT | MESSAGE_AGE_ALERT On Queue queuename - age
of message : Maximum age on queue threshold
(limit) breached. |
|
The age of a message on the given queue has breached its configured limit. |
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