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From Camel 2.4 onwards Camel has a feature to not block while waiting for a delayed redelivery to occur. However if you use transacted routes then Camel will block as its mandated by the transaction manager to execute all the work in the same thread context. You can enable the non blocking asynchronous behavior by the asyncDelayedRedelivery option. This option can be set on the errorHandler, onException or the redelivery policies.

By default the error handler will create and use a scheduled thread pool to trigger redelivery in the future. From Camel 2.8 onwards you can configure the executorServiceRef on the Error Handler to indicate a reference to either a shared thread pool you can enlist in the registry, or a thread pool profile in case you want to be able to control pool settings.

Catching multiple exceptions

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