Details
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Bug
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Status: Closed
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Critical
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Resolution: Cannot Reproduce
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2.7.2
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None
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Unknown
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Important
Description
Updated: Please see the comments. This is caused due to a deadlock.
Overall since DefaultSingletonBeanRegistry is being called from main thread and CXF tries to use it in a seperate thread, it causes deadlock.
See the comments:
https://jira.spring.io/browse/SPR-8471
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I have a requirement where I need to move a webservice call to a seperate thread so that I could retry if it doesn't complete within a time limit. To achieve I moved my webservice call to a futuretask and in my main thread I am doing a task.get(timeout). A webservice call that is normally completed in few miliseconds doesn't complete even after 10 mins if I move it into a seperate thread.
Is there a problem with CXF. I am getting a NullPointer exception around the cxf.endpoint.ClientImpl.onMessage() call. Stacktrace at the end.
Please help as I am stuck with no clues.
I am including the code thats causing problems only when I move the call in a seperate thread.
@Override public IRuleSet loadRuleSet(String ruleSetName) throws RulesEngineException { IRuleSet ruleSet=null; ExecutorService executor = Executors.newFixedThreadPool(1); for (IRuleSetLoader ruleSetLoader : loaders) { try { FutureTask<IRuleSet> task = new FutureTask<IRuleSet>(new LoaderTask(ruleSetLoader, ruleSetName)); executor.submit(task); long timeout=30; try{ ruleSet = task.get(timeout, TimeUnit.SECONDS); }catch(Exception e) { LOGGER.info("202::Exception", e); } // if I uncomment the below call and comment the above task submit it works perfectly fine. //ruleSet = ruleSetLoader.loadRuleSet(ruleSetName); if (ruleSet != null){ return ruleSet; }else { ruleSet = ruleSetLoader.loadRuleSet(ruleSetName); } } catch (Exception e) { LOGGER.info("Failed to load rule set " + ruleSetName + " using ruleSetLoader:" + ruleSetLoader.getClass(), e); } } throw new RulesEngineException("Unable to load RuleSet " + ruleSetName); } private final static class LoaderTask implements Callable<IRuleSet> { private final IRuleSetLoader ruleSetLoader; private final String ruleSetName; private LoaderTask(IRuleSetLoader ruleSetLoader, String ruleSetName) { this.ruleSetLoader = ruleSetLoader; this.ruleSetName = ruleSetName; } @Override public IRuleSet call() throws Exception { LOGGER.info("Starting task."); IRuleSet ruleSet=null; try { //webservice call ruleSet = ruleSetLoader.loadRuleSet(ruleSetName); } catch (Exception e) { LOGGER.info("101::Exception encountered", e); } return ruleSet; } }
// stacktrace 17:41:50.940 [pool-3-thread-1] WARN o.a.c.p.PhaseInterceptorChain - Interceptor for {http://readonly.webservice.rulesengine.tbea.jpm.com/}IRulesEngineReadOnlyWebServiceService#{http://readonly.webservice.rulesengine.tbea.jpm.com/}getRuleSet has thrown exception, unwinding now java.lang.NullPointerException: NullPointerException invoking http://psie0p111.svr.emea.jpmchase.net:17190/rules-engine-web/5/rulesEngineReadOnlyWebService: null at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.7.0_67] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_67] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_67] at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_67] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.mapException(HTTPConduit.java:1336) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1325) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] at org.apache.cxf.io.AbstractWrappedOutputStream.close(AbstractWrappedOutputStream.java:77) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.io.AbstractThresholdOutputStream.close(AbstractThresholdOutputStream.java:102) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.io.CacheAndWriteOutputStream.postClose(CacheAndWriteOutputStream.java:50) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.io.CachedOutputStream.close(CachedOutputStream.java:229) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:622) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:271) ~[cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:530) [cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:463) [cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:366) [cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:319) [cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:96) [cxf-rt-frontend-simple-2.7.2.jar:2.7.2] at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:133) [cxf-rt-frontend-jaxws-2.7.2.jar:2.7.2] at com.sun.proxy.$Proxy75.getRuleSet(Unknown Source) [na:na] at com.jpm.tbea.rulesengine.core.load.impl.WebServiceRuleSetLoader.loadRuleSet(WebServiceRuleSetLoader.java:35) [classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.JanusAuthenticatedWebServiceRuleSetLoader.loadRuleSet(JanusAuthenticatedWebServiceRuleSetLoader.java:67) [classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.FailoverRuleSetLoader$LoaderTask.call(FailoverRuleSetLoader.java:124) [classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.FailoverRuleSetLoader$LoaderTask.call(FailoverRuleSetLoader.java:1) [classes/:na] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_67] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_67] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_67] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67] Caused by: java.lang.NullPointerException: null at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:719) [cxf-api-2.7.2.jar:2.7.2] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1590) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:1488) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1307) ~[cxf-rt-transports-http-2.7.2.jar:2.7.2] ... 25 common frames omitted 17:41:50.941 [pool-3-thread-1] INFO c.j.t.r.c.l.i.FailoverRuleSetLoader - 101::Exception encountered java.lang.NullPointerException: null at org.apache.cxf.jaxws.JaxWsClientProxy.addressChanged(JaxWsClientProxy.java:248) ~[cxf-rt-frontend-jaxws-2.7.2.jar:2.7.2] at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:166) ~[cxf-rt-frontend-jaxws-2.7.2.jar:2.7.2] at com.sun.proxy.$Proxy75.getRuleSet(Unknown Source) ~[na:na] at com.jpm.tbea.rulesengine.core.load.impl.WebServiceRuleSetLoader.loadRuleSet(WebServiceRuleSetLoader.java:35) ~[classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.JanusAuthenticatedWebServiceRuleSetLoader.loadRuleSet(JanusAuthenticatedWebServiceRuleSetLoader.java:67) ~[classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.FailoverRuleSetLoader$LoaderTask.call(FailoverRuleSetLoader.java:124) [classes/:na] at com.jpm.tbea.rulesengine.core.load.impl.FailoverRuleSetLoader$LoaderTask.call(FailoverRuleSetLoader.java:1) [classes/:na] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_67] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_67] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_67] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]