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

Sanjeet Karamchandani updated CXF-6354:
---------------------------------------
    Description: 
Updated: Please see the comments. This is caused due to a deadlock.
Overall since DefaultSingletonBeanRegistry is being called from main 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]


  was:
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
>
> Updated: Please see the comments. This is caused due to a deadlock.
> Overall since DefaultSingletonBeanRegistry is being called from main 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]



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