JAXRS proxy - http4 NullPointer

[michal.warecki]

Hi,

I wanted to create a simple jaxrs proxy. Here is a configuration using fixed target http address:

When I accesses http://localhost/services/process-manager/test I'im getting NullPointerException from http4 component.

Here is a stack:

java.lang.NullPointerException at java.lang.StringBuilder.<init>(StringBuilder.java:92) at org.apache.camel.component.http4.HttpProducer.createMethod(HttpProducer.java:287) at org.apache.camel.component.http4.HttpProducer.process(HttpProducer.java:78) at org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:50) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:104) at org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:272) at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:98) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98) at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89) at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98) at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89) at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:99) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98) at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89) at org.apache.camel.fabric.FabricTraceProcessor.process(FabricTraceProcessor.java:70) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:314) at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209) at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:269) at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:102) at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:80) at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98) at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89) at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73) at org.apache.camel.component.jetty.CamelContinuationServlet.service(CamelContinuationServlet.java:109) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1352) at org.eclipse.jetty.servlets.MultiPartFilter.doFilter(MultiPartFilter.java:97) at org.apache.camel.component.jetty.CamelMultipartFilter.doFilter(CamelMultipartFilter.java:41) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110) at org.eclipse.jetty.server.Server.handle(Server.java:346) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:601) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpPar

What am I doing wrong?

[njiang]

when you using the http4 endpoint as a proxy, you need to set the option bridgeEndpoint to be true like this

<route>
<from uri="jetty:http://localhost:80/services/process-manager?matchOnUriPrefix=true"></from>
<to uri="http4://www.google.com?bridgeEndpoint=true"></to>
</route>

Willem

[davsclaus]

What version of Camel are you using? I would like to track down the NPE and report a better failure message.

[michal.warecki]

Thanks for answer,

apache-servicemix-4.4.0-fuse-00-39

[davsclaus]

Thanks for reporting. I have created a ticket at Apache to fix this

https://issues.apache.org/jira/browse/CAMEL-4242