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https://issues.apache.org/activemq/browse/CAMEL-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=45962#action_45962
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Claus Ibsen commented on CAMEL-927:
-----------------------------------
Ah of course you can stack inputs as well ;)
so from().from() should basically be supported. But the don't have outputs and
thus causes the bug
> Double input without output produce exception
> ---------------------------------------------
>
> Key: CAMEL-927
> URL: https://issues.apache.org/activemq/browse/CAMEL-927
> Project: Apache Camel
> Issue Type: Bug
> Components: camel-core
> Affects Versions: 1.5.0
> Reporter: Vadim Chekan
> Priority: Minor
>
> Turn trace on.
> Run this route:
> from("timer://kickoff_1?period=10000&delay=1");
> As expected there is output from Trace Interceptor every 10 sec.
> Now run this route:
> from("timer://kickoff_1?period=10000&delay=1").
> from("timer://kickoff_2?period=10000&delay=2");
> You will get exception:
> 2008-09-22 06:03:01,871 [d=10000&delay=2] INFO TraceInterceptor
> - ID-ubuntu/50540-1222063381751/2-1 -> interceptor1
> Interceptor[Delegate(null)] InOnly
> Properties:{org.apache.camel.timer.name=kickoff_2,
> org.apache.camel.timer.firedTime=Mon Sep 22 06:03:01 GMT 2008,
> org.apache.camel.timer.period=10000} Headers:{firedTime=Mon Sep 22 06:03:01
> GMT 2008} BodyType:null Body:Message: null
> 2008-09-22 06:03:01,872 [d=10000&delay=2] ERROR DeadLetterChannel
> - Failed delivery for exchangeId: ID-ubuntu/50540-1222063381751/0-0. On
> delivery attempt: 0 caught: java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:41)
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:50)
> at
> org.apache.camel.processor.DelegateProcessor.processNext(DelegateProcessor.java:50)
> at
> org.apache.camel.processor.DelegateProcessor.proceed(DelegateProcessor.java:79)
> at
> org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:67)
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
> at
> org.apache.camel.processor.DeadLetterChannel.process(DeadLetterChannel.java:174)
> at
> org.apache.camel.processor.DeadLetterChannel.process(DeadLetterChannel.java:96)
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:57)
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:41)
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:50)
> at
> org.apache.camel.processor.DelegateProcessor.processNext(DelegateProcessor.java:50)
> at
> org.apache.camel.processor.DelegateProcessor.proceed(DelegateProcessor.java:79)
> at
> org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:67)
> at
> org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:43)
> at
> org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:39)
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:41)
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:66)
> at
> org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:98)
> at
> org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:49)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Why single input works fine and two produce an exception?
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