liferay Ext调用portlet插件服务bug

liferay　ext访问portlet底层数据库６.０.６bug官方解决方案

 

Description

The code generated by the service builder was not working. We get a null pointer exception when calling a service method at the generated façade. The generated code contains logical errors:
The MethodKey member variables in the *ServiceClp-classes are implicitly initialized while making use of the ClassLoaderProxy member variable which is initialized by the constructor. The implicit initializations of the MethodKey members are done before the ClassLoaderProxy member is set by the constructor. Unfortunately during the MethodKey member initialization the ClassLoaderProxy member is being accessed which results in the null pointer. See the corresponding template file for a fix (service_clp.ftl).

After this modification the null pointer was gone but replaced by a ClassNotFoundException. The message of the exception said something like "Class $Proxy271 not found". The problem is located in the generated *ServiceUtil-class. The ClassLoaderProxy instance is created with a deprecated constructor which takes the service façade object and the portlet class loader. Internally the constructor took the class name from the service façade object with getClass().getName(). I supposed that this was the reason for the weird class name "$Proxy271" (probably because it is an implementation class name and the class is a proxy generated by Spring-AOP).

However, to fix this I used the non-deprecated constructor (where the class name can be specified) and set the service façade interface class name. I've attached the fixed template file (service_util.ftl).
Though I wasn't sure if this would work - after this modification everything seemed to work fine.

Attachments

1. 
   service_clp.ftl
   08/Oct/10 8:02 AM
   3 kB
2. 
   service_util.ftl
   08/Oct/10 8:02 AM
   4 kB

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Puj added a comment - 26/Nov/10 1:58 AM

Hi,

can you please explain how I should use thiese .ftl file to avoid the problem? I get NullPointerException when trying to call a method of my xxxLocalServiceUtil in another plug-in.
Pretty much the same as your issue, except I don't receive Class $Proxy271 not found (yet!).

Thanks for the help!

Frank Hardy added a comment - 26/Nov/10 4:15 AM

Hi Puj,

you have two options for this:

1. If you have the portal sources then copy the attached template files in directory (replacing the old ones ):

<location of the portal source>/portal/portal-impl/src/com/liferay/portal/tools/servicebuilder/dependencies

Then build the portal-impl.jar

2. If you don't have the portal sources locate the portal-impl.jar in your portal installation (what your Liferay-SDK is configured to - see app.server.dir property in your build.properties file). You will find it in the portal web-app in WEB-INF/lib. E.g. for Tomcat-bundle in <tomcat>/webapps/ROOT/WEB-INF/lib. Then unpack the jar to some temp location. Replace the templates which are located in classes/com/liferay/portal/tools/servicebuilder/dependencies. Repack the portal-impl.jar.

Finally replace the portal-impl.jar in the portal web-app WEB-INF/lib directory.

Then it should work (for me it did ).

HTH

Regards,
Frank.

Seshendra Nalla added a comment - 30/Nov/10 10:57 PM

I ran into the exact same situation NPE (which I narrowed it down to the "Implicit MethodKey member initialization in the *serviceclp.java generated by Service Builder) followed by the $Proxy271 not found exception. Modifying the template files (as suggested above) solved the problem.

Regards,
Seshendra

Kristoffer Onias added a comment - 21/Jan/11 4:32 PM - edited

Hi David,
Has your issue been resolved by the files in the attachment? Otherwise, please provide additional information based on the information found in our JIRA reporting wiki (http://www.liferay.com/community/wiki/-/wiki/1071674/JIRA/maximized ) Thanks!

David Wainwright added a comment - 24/Jan/11 12:35 AM

Hallo Kristoffer,
yes, the supplied files fix the issue in the concrete case (the files came from us as an aid to fixing the bug).
Regards,
David

Kristoffer Onias added a comment - 24/Jan/11 10:32 AM

Hello David,
It's good to hear that your issue has been resolved. I will close this ticket as fixed then. Thank you for reporting the issue.

julien added a comment - 08/Feb/11 7:40 AM

I have the same problem, but the fix does not work for me

I'm on LR 6.0.5 GA (rev 60396)

Im using the portal source files, so I replaced the 2 files you provided.
Then I recompiled the portal, I generated my service and deployed it, and then I started the portal, but I still have the same issue :

16:34:14,095 ERROR [jsp:154] java.lang.NullPointerException
at blabla.model.service.LDAPEtudiantLocalServiceClp.<init>(LDAPEtudiantLocalServiceClp.java:398)
at blabla.model.service.LDAPEtudiantLocalServiceUtil.getService(LDAPEtudiantLocalServiceUtil.java:244)
at blabla.model.service.LDAPEtudiantLocalServiceUtil.getLDAPEtudiant(LDAPEtudiantLocalServiceUtil.java:170)

Did I try to fix it in the right way ?

David Wainwright added a comment - 08/Feb/11 7:57 AM

This Issue is not fixed, the files that we supplied fix the *concrete * case. As soon as you regenerate, the problem is back again.

julien added a comment - 08/Feb/11 8:21 AM

What do you mean by *concrete * case ?

julien added a comment - 08/Feb/11 8:31 AM

Nevermind, finally it's working very well
Thx for the fix !

Romano Silva added a comment - 24/Feb/11 6:29 AM

Is this issue related to LPS-14035 ?

julien added a comment - 24/Feb/11 7:16 AM

yes it is

Alessandra Donnini added a comment - 19/Jul/11 1:13 AM

I'm using 6.0.6 and I have the same problem and the fix doesn't work. I substituted the files in portal source, I built portal-impl.jar and I deployed it in ROOT/WEB-INF/lib. What it means as soon as I regenerate the problem is back againg? Regenerate what? The portlet plugin that provides services (using service builder) or the plugin that uses services?

Alex Chew added a comment - 21/Aug/11 8:30 AM

The problem still exists on 6.0.6. After I replaced attached .tpl files I got below errors.

15:16:54,687 ERROR [BasePersistenceImpl:182] Caught unexpected exception java.lang.NullPointerException
com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
at com.liferay.portal.service.persistence.impl.BasePersistenceImpl.processException(BasePersistenceImpl.java:189)
at com.etravel.hotel.service.persistence.HotelPersistenceImpl.findAll(HotelPersistenceImpl.java:449)
at com.etravel.hotel.service.persistence.HotelPersistenceImpl.findAll(HotelPersistenceImpl.java:385)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
at com.liferay.portal.dao.shard.ShardAdvice.invokePersistence(ShardAdvice.java:205)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy357.findAll(Unknown Source)
at com.etravel.hotel.service.base.HotelLocalServiceBaseImpl.getHotels(HotelLocalServiceBaseImpl.java:212)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at com.liferay.portal.dao.jdbc.aop.DynamicDataSourceTransactionInterceptor.invoke(DynamicDataSourceTransactionInterceptor.java:44)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy355.getHotels(Unknown Source)
at com.etravel.hotel.service.impl.HotelServiceImpl.getMyHotels(HotelServiceImpl.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at com.liferay.portal.dao.jdbc.aop.DynamicDataSourceTransactionInterceptor.invoke(DynamicDataSourceTransactionInterceptor.java:44)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy356.getMyHotels(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.kernel.util.MethodHandler.invoke(MethodHandler.java:81)
at com.liferay.portal.kernel.util.ClassLoaderProxy.invoke(ClassLoaderProxy.java:67)
at com.etravel.hotel.service.HotelServiceClp.getMyHotels(HotelServiceClp.java:40)
at com.etravel.hotel.service.HotelServiceUtil.getMyHotels(HotelServiceUtil.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.action.JSONServiceAction.getJSON(JSONServiceAction.java:120)
at com.liferay.portal.struts.JSONAction.execute(JSONAction.java:49)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:152)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:508)
at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:485)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:261)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.themepreview.ThemePreviewFilter.processFilter(ThemePreviewFilter.java:88)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:126)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:81)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:179)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:239)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)
at com.liferay.portal.servlet.filters.threadlocal.ThreadLocalFilter.processFilter(ThreadLocalFilter.java:35)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:465)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.nextTimestamp(RegionFactoryCacheProviderBridge.java:93)
at org.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:650)
at org.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:659)
at org.springframework.orm.hibernate3.SessionFactoryUtils.doGetSession(SessionFactoryUtils.java:318)
at org.springframework.orm.hibernate3.SessionFactoryUtils.doGetSession(SessionFactoryUtils.java:256)
at org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:60)
at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:698)
at com.liferay.portal.dao.orm.hibernate.SessionFactoryImpl.openSession(SessionFactoryImpl.java:59)
at com.liferay.portal.service.persistence.impl.BasePersistenceImpl.openSession(BasePersistenceImpl.java:177)
at com.etravel.hotel.service.persistence.HotelPersistenceImpl.findAll(HotelPersistenceImpl.java:433)
... 152 more

Cid Miranda added a comment - 27/Sep/11 5:28 PM

After attach .tpl files run service builder again.

Owen James added a comment - 24/Nov/11 7:40 AM

Hello,

I'm using LR 6.0.6 CE.

I'm encountering into the issue described by David.

Context : I have two portlets. One creating services and another consuming them.
Error : Exactly what you describe in your post.

Well, I’ve apply the solution by packaging the portal-impl.jar with the new versions of service_util.ftl and service_clp.ftl. I’ve now access to the share services in the second portlet. However, a new issue has come. Anytime I want to save an entity in the first portlet (an operation that worked before), I got an NoSuchMethodException. But, the method exist, and with the right signature. Here is an excerpt of the log exception :

java.lang.NoSuchMethodException: com.alti.cnp.service.SinistreLocalServiceUtil.updateSinistre(com.alti.cnp.model.Sinistre)
at java.lang.Class.getMethod(Class.java:1605)
at com.liferay.portal.kernel.util.MethodCache._get(MethodCache.java:107)

Any help would be greatly appreciate.

Thanks

Ken Barron added a comment - 24/Nov/11 12:31 PM

Your NoSuchMethodException should disappear if you make sure that your service builder jar file is either:
1. under your lib/ext directory (talking Tomcat here - anyway your appserver shared lib directory), AND removed from your WEB-INF/lib directory of your service builder webapp.
OR 2. under the WEB-INF/lib directory of all of your web apps (including the portlet web app)
I haven't tried the second method but the first one definitely worked for me. Got this info from another Liferay forum or blog post but I can't remember where to give you the link.