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https://issues.apache.org/jira/browse/CAMEL-3776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244627#comment-13244627
]
Christian Müller commented on CAMEL-3776:
-----------------------------------------
By using the XMLStreamReader in FallbackTypeConverter and a shared
Unmarshaller, I also got the NullpointerException from JAXB:
{noformat}
java.lang.NullPointerException
at
com.sun.xml.bind.v2.runtime.Coordinator.popCoordinator(Coordinator.java:157)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:461)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:242)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:176)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:360)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:332)
at
org.apache.camel.converter.jaxb.FallbackTypeConverter.unmarshal(FallbackTypeConverter.java:204)
at
org.apache.camel.converter.jaxb.FallbackTypeConverter.unmarshall(FallbackTypeConverter.java:139)
at
org.apache.camel.converter.jaxb.FallbackTypeConverter.convertTo(FallbackTypeConverter.java:91)
at
org.apache.camel.impl.converter.BaseTypeConverterRegistry.doConvertTo(BaseTypeConverterRegistry.java:204)
at
org.apache.camel.impl.converter.BaseTypeConverterRegistry.mandatoryConvertTo(BaseTypeConverterRegistry.java:141)
at
org.apache.camel.impl.MessageSupport.getMandatoryBody(MessageSupport.java:100)
at
org.apache.camel.processor.ConvertBodyProcessor.process(ConvertBodyProcessor.java:58)
at
org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at
org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:91)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at
org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:333)
at
org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:223)
at
org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at
org.apache.camel.processor.interceptor.DefaultChannel.process(DefaultChannel.java:303)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:117)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at
org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at
org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:122)
at
org.apache.camel.processor.RouteInflightRepositoryProcessor.processNext(RouteInflightRepositoryProcessor.java:48)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at
org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:71)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at
org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
at
org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:150)
at
org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:117)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:86)
at
org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:63)
at
org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:352)
at
org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:324)
at
org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:223)
at
org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:324)
at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:169)
at
org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:111)
at
org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:124)
at
org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:342)
at
org.apache.camel.example.DataFormatConcurrentTest$2.run(DataFormatConcurrentTest.java:74)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
{noformat}
And as documented in [1], the Unmarshaller from Jaxb Impl RI (Oracle) is not
thread safe.
I pinged Dan to get a pointer to the CXF code where they share the
Unmarshaller...
[1] http://jaxb.java.net/guide/Performance_and_thread_safety.html
> Add pooling support for JAXB data format
> ----------------------------------------
>
> Key: CAMEL-3776
> URL: https://issues.apache.org/jira/browse/CAMEL-3776
> Project: Camel
> Issue Type: New Feature
> Components: camel-jaxb
> Reporter: Claus Ibsen
> Fix For: 3.0.0
>
> Attachments: jaxb-pool.patch
>
>
> We should use the ServicePool in camel-core to pool JAXB / marshaller /
> unmarshaller.
> Of course ppl should be able to customize pool settings and if to be used.
> Also mind that for type converters with JAXB you do not configure a JAXB data
> format. And thus we should
> still be able to configure and use pooling, so the type converter can be more
> efficient.
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