It seems i don't understand some underlying concepts about custom Exceptions handling in Spring Integration(

I need to intercept some of my RuntimeException-derived custom exceptions (thrown from some my Java method) and depending of it's type route the app execution flow to some other route.

I use the Spring Integration version 4.3.10.RELEASE.

To do this i declare the **int:exception-type-router** like this:

```
<int:exception-type-router input-channel="errorChannel" default-output-channel="nullChannel">
        <int:mapping exception-type="com.surr.exception.SurrRoutingException"
                     channel="handleRedirectChannel"/>
        <int:mapping exception-type="com.surr.exception.SurrFatalException"
                     channel="surrChannelMain"/>
        <!-- some more mappings -->
</int:exception-type-router>

```

Channel declaration sample:

```
<int:channel id="handleRedirectChannel"
     datatype="com.surr.exception.SurrRoutingException">
      <int:queue/>
</int:channel>

```

After my Exception throwing i cannot step into related channels. What i'm doing wrong? Maybe i've missed smth in the app initial setup?

Thanks a lot for any assist.

**Update**
After notes from Artem i made some changes described below:

1. Introduced additional error channel:

```
<int:channel id="errorChannel1">
        <int:queue capacity="500"/>
</int:channel>

```

2. As the very 1st statement in my message processing chain overrode the 'errorChannel' header:

```
<int:header-enricher>
            <int:header name="errorChannel" value="errorChannel1"/>
</int:header-enricher>

```

3. Modified the 'int:exception-type-router':

```
<int:exception-type-router input-channel="errorChannel1" default-output-channel="nullChannel">
        <int:mapping exception-type="java.lang.Throwable"
                     channel="handleRedirectChannel"/>
        <int:mapping exception-type="java.lang.RuntimeException"
                     channel="handleRedirectChannel"/>
        <int:mapping exception-type="com.surr.exception.SurrRoutingException"
                     channel="handleRedirectChannel"/>
        <int:mapping exception-type="com.surr.exception.SurrFatalException"
                     channel="surrChannelMain"/>
</int:exception-type-router>

```

4. Changed the declarations of the recipient channels:

```
<int:channel id="handleRedirectChannel">
     <int:queue capacity="50"/>
</int:channel>

<int:channel id="surrChannelMain">
     <int:queue capacity="50"/>
</int:channel>

```

5. In my test began to 'listen' the 'errorChannel1' along w/ the 'handleRedirectChannel' channels

So far there is no any tracks of my thrown Exceptions. I suspect there are some more rules exist to catch the Exception but can't figure them out

**One more update**
I've issued my exception manually using MessageBuilder (MessageBuilder.withPayload(new MyExceptionObjectWithNeededArguments).build()) and sent it to the 'errorChannel1'. Still no effect(

**Stack trace**

```
2021-02-17 23:03:48,742  INFO [   task-scheduler-20             ] [] !! IntentsService.prepareMessages
com.azoft.fakturachat.surrogate.exception.SurrogateRoutingException: Got empty intent description by scenario: [default] and tip: [some_unknown_intent]
    at com.azoft.fakturachat.surrogate.IntentsService.fetchIntentDescription(IntentsService.java:84) ~[main/:?]
    at com.azoft.fakturachat.surrogate.IntentsService.lambda$prepareMessages$0(IntentsService.java:58) ~[main/:?]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_172]
    at java.util.Collections$2.tryAdvance(Collections.java:4717) ~[?:1.8.0_172]
    at java.util.Collections$2.forEachRemaining(Collections.java:4725) ~[?:1.8.0_172]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[?:1.8.0_172]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[?:1.8.0_172]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_172]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_172]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_172]
    at com.azoft.fakturachat.surrogate.IntentsService.prepareMessages(IntentsService.java:59) ~[main/:?]
    at com.azoft.fakturachat.surrogate.IntentsService$$FastClassBySpringCGLIB$$d29d5141.invoke(<generated>) ~[main/:?]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at com.azoft.fakturachat.aspect.LoggingAspect.logMethod(LoggingAspect.java:31) [main/:?]
    at sun.reflect.GeneratedMethodAccessor131.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656) [spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at com.azoft.fakturachat.surrogate.IntentsService$$EnhancerBySpringCGLIB$$9cfa94da.prepareMessages(<generated>) [main/:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_172]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172]
    at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:113) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:347) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:131) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:330) [spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:169) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:128) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.ExpressionEvaluatingMessageProcessor.processMessage(ExpressionEvaluatingMessageProcessor.java:72) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.transformer.support.ExpressionEvaluatingHeaderValueMessageProcessor.processMessage(ExpressionEvaluatingHeaderValueMessageProcessor.java:71) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.transformer.HeaderEnricher.transform(HeaderEnricher.java:119) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.transformer.MessageTransformingHandler.handleRequestMessage(MessageTransformingHandler.java:89) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:109) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.MessageHandlerChain.handleMessageInternal(MessageHandlerChain.java:110) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.integration.router.AbstractMessageRouter.handleMessageInternal(AbstractMessageRouter.java:194) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) [spring-messaging-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler.doReleaseMessage(DelayHandler.java:376) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler.access$500(DelayHandler.java:83) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler$ReleaseMessageHandler.handleMessage(DelayHandler.java:470) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler.releaseMessage(DelayHandler.java:368) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler.access$100(DelayHandler.java:83) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.integration.handler.DelayHandler$1.run(DelayHandler.java:328) [spring-integration-core-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_172]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_172]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_172]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_172]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_172]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_172]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_172]
2021-02-17 23:03:48,751  INFO [   task-scheduler-20             ] [] <- IntentsService.prepareMessages, procTime=306

```

The 'errorChannel1' channel was introduced only to test this issue. There is no other consumer(s) except this 'exception-type-router'

Exception is 'thrown' in the following way:

```
SurrRoutingException ex1 = new SurrRoutingException(
                MessageFormat.format("Failed to find intent description by scenario: [{0}] and tip: [{1}]",
                    scenario, tip), context);
errorChannel.send(MessageBuilder.withPayload(ex1).build());

```

Error channel declaration:

```
private final QueueChannel errorChannel;

@Autowired
public IntentsService(@Qualifier("errorChannel1") QueueChannel errorChannel) 
{
        this.errorChannel = errorChannel;
}

```