How to handle camel-quickfix CannotSendException?

Question

I am using QuickFix/J 1.6.4 in a camel-quickfix component. Sometimes, I get the CannotSendException and it is not clear, what the exception cause is. I looked at the code, but there it seems that this exception is thrown, when the message could not be send - regardless of the reason.

So how do I have to handle this exception? Do I have to implement a retry mechanism, or does the engine handle this for me? If the engine does, how can I verify, that the message is sent afterwards?

Exception Stacktrace (I replaced the FIX message with *** because I cannot publish it):

org.apache.camel.component.quickfixj.CannotSendException: Cannot send FIX message: ***
at org.apache.camel.component.quickfixj.QuickfixjProducer.sendMessage(QuickfixjProducer.java:75)
at org.apache.camel.component.quickfixj.QuickfixjProducer.process(QuickfixjProducer.java:47)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:145)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:468)
at org.apache.camel.spring.spi.TransactionErrorHandler.processByErrorHandler(TransactionErrorHandler.java:220)
at org.apache.camel.spring.spi.TransactionErrorHandler.process(TransactionErrorHandler.java:101)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:171)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:121)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:117)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:468)
at org.apache.camel.spring.spi.TransactionErrorHandler.processByErrorHandler(TransactionErrorHandler.java:220)
at org.apache.camel.spring.spi.TransactionErrorHandler$1.doInTransactionWithoutResult(TransactionErrorHandler.java:183)
at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:33)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:131)
at org.apache.camel.spring.spi.TransactionErrorHandler.doInTransactionTemplate(TransactionErrorHandler.java:176)
at org.apache.camel.spring.spi.TransactionErrorHandler.processInTransaction(TransactionErrorHandler.java:136)
at org.apache.camel.spring.spi.TransactionErrorHandler.process(TransactionErrorHandler.java:105)
at org.apache.camel.spring.spi.TransactionErrorHandler.process(TransactionErrorHandler.java:114)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:196)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:121)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:196)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:91)
at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:112)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:555)
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:515)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:485)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:243)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1103)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1095)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:992)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1164)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:634)
at java.lang.Thread.run(Thread.java:809)