Gaelle Fournier created CAMEL-24408:
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Summary: SEDA discardIfNoConsumers breaks after consumer removal
when sharing the same URI
Key: CAMEL-24408
URL: https://issues.apache.org/jira/browse/CAMEL-24408
Project: Camel
Issue Type: Bug
Components: camel-seda
Affects Versions: 4.22.0, 4.19.0
Reporter: Gaelle Fournier
When a SEDA producer and consumer share the same endpoint URI, removing the
consumer route destroys the shared queue state. Subsequent sends throw
SedaConsumerNotAvailableException instead of silently discarding as
{{discardIfNoConsumers=true}} specifies. The exchange is discarded correctly
before a consumer is ever added, but not after one is removed.
The root cause seems to be in {{SedaComponent.onShutdownEndpoint() }}. It
checks {{endpoint.getConsumers().isEmpty() }}before tearing down the queue, but
does not check for active producers. Since the producer and consumer resolve to
the same {{SedaEndpoint}} instance, the {{QueueReference}} is removed entirely.
{{SedaProducer.addToQueue()}} then gets a null queue and throws before the
{{discardIfNoConsumers}} check is reached.
See:
https://camel.zulipchat.com/#narrow/channel/257298-camel/topic/Question.20about.20SedaConsumerNotAvailableException/with/617246614
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