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Type: Bug
Resolution: Done
Priority: Major
Fix Version/s: 3.15.4.Final, 4.7.7.Final, 5.0.4.Final, 6.0.3.Final, 6.1.0.Beta3, 6.1.0.Final
Affects Version/s: None
Component/s: None
Labels:
None

Forum Reference:
https://github.com/resteasy/resteasy/discussions/3024
Git Pull Request:
https://github.com/resteasy/resteasy/pull/3125, https://github.com/resteasy/resteasy/pull/3129, https://github.com/resteasy/resteasy/pull/3130, https://github.com/resteasy/resteasy/pull/3131, https://github.com/resteasy/resteasy/pull/3132

If a resource returns a null value and it's processed by a ContainerResponseFilter where the filter attempts to set the entity, unpredictable results occur. If ContainerResponseFilter.setEntity("changed"); is invoked an NPE occurs:

08:34:57,779 ERROR [org.jboss.resteasy.plugins.server.netty.i18n] (nioEventLoopGroup-3-1) RESTEASY018525: Unexpected: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
	at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:368)
	at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:218)
	at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:614)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
	at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:261)
	at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:161)
	at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364)
	at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:164)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:247)
	at org.jboss.resteasy.plugins.server.netty.RequestDispatcher.service(RequestDispatcher.java:86)
	at org.jboss.resteasy.plugins.server.netty.RequestHandler.channelRead0(RequestHandler.java:51)
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61)
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NullPointerException
	at org.jboss.resteasy.core.MediaTypeMap$CachedMediaTypeAndClass.<init>(MediaTypeMap.java:297)
	at org.jboss.resteasy.core.MediaTypeMap.getPossible(MediaTypeMap.java:553)
	at org.jboss.resteasy.core.providerfactory.ResteasyProviderFactoryImpl.resolveMessageBodyWriter(ResteasyProviderFactoryImpl.java:1287)
	at org.jboss.resteasy.core.providerfactory.ResteasyProviderFactoryImpl.getMessageBodyWriter(ResteasyProviderFactoryImpl.java:1268)
	at org.jboss.resteasy.core.ServerResponseWriter.lambda$writeNomapResponse$3(ServerResponseWriter.java:117)
	at org.jboss.resteasy.core.interception.jaxrs.ContainerResponseContextImpl.filter(ContainerResponseContextImpl.java:404)
	at org.jboss.resteasy.core.ServerResponseWriter.executeFilters(ServerResponseWriter.java:252)
	at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:101)
	at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:74)
	at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:594)
	... 19 more

If ContainerResponseContext..setEntity("changed", null, MediaType.TEXT_PLAIN_TYPE); is invoked nothing seems to happen. The value null is not changed on the entity.

The linked forum post has details.

is incorporated by

WFLY-16828 [26.x] Upgrade RESTEasy to 4.7.7.Final

Closed

Assignee:: Petr Beran

Reporter:: James Perkins

Votes:: 1 Vote for this issue

Watchers:: 3 Start watching this issue

Created:: 2022/02/08 4:42 PM

Updated:: 2022/08/16 6:51 PM

Resolved:: 2022/07/06 9:09 PM

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