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Posted to issues@cxf.apache.org by "Daniel Kulp (JIRA)" <ji...@apache.org> on 2017/03/27 18:45:41 UTC

[jira] [Updated] (CXF-6354) NullPointer exception in cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:719)

     [ https://issues.apache.org/jira/browse/CXF-6354?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Kulp updated CXF-6354:
-----------------------------
    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
--------------------


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.
{code:java}
@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;
		}		
		
	}
{code}

{code}
// 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]
{code}


  was:
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
--------------------


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]



> NullPointer exception in cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:719)
> -------------------------------------------------------------------------------
>
>                 Key: CXF-6354
>                 URL: https://issues.apache.org/jira/browse/CXF-6354
>             Project: CXF
>          Issue Type: Bug
>          Components: JAX-WS Runtime
>    Affects Versions: 2.7.2
>            Reporter: Sanjeet Karamchandani
>            Priority: Critical
>
> 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
> --------------------
> 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.
> {code:java}
> @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;
> 		}		
> 		
> 	}
> {code}
> {code}
> // 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]
> {code}



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