Foren

Home » Liferay Portal » English » 3. Development

Kombinierte Ansicht Flache Ansicht Baumansicht
Threads [ Zurück | Nächste ]
toggle
alex wom
[SOLVED] Installing SOLR with Liferay 6
1. Juni 2011 22:05
Antwort

alex wom

Rang: Regular Member

Nachrichten: 166

Eintrittsdatum: 4. Mai 2009

Neue Beiträge

I'm using Liferay 6.0.6 in tomcat bundle and I'm trying to install SOLR on my MAC/OS

SOLR installation
-----------------------
I unzipped apache-solr-3.1.0.
I put apache-solr-3.1.0.war in example.
I prepared solr.xml as specified in http://www.liferay.com/en/community/wiki/-/wiki/Main/Integrate%20Solr%20with%20Liferay%20portal;jsessionid=8DA52AA57C6D9058D229741DF4C76B69.node-1
and I used absolute path as in the following.
<?xml version="1.0" encoding="utf-8"?>
<Context docBase="$SOLR_HOME/example/apache-solr-3.1.0.war" debug="0" crossContext="true">
<Environment name="solr/home" type="java.lang.String" value="$SOLR_HOME/example/solr" override="true"/>
</Context>
Moreover solr/home has been set to $SOLR_HOME/example/solr because if I do as suggested in the post, using $SOLR_HOME/example I cannot raise SOLR admin page with the URL http://localhost:8080/solr/admin.
I updated tomcat/bin/setenv.sh as in the following:
JAVA_OPTS="$JAVA_OPTS -Dfile.encoding=UTF8 -Duser.timezone=GMT -Xmx1024m -XX:MaxPermSize=256m -Dsolr.solr.home=$SOLR_HOME/example/solr/data"
I put SOLR plugin schema.xml in $SOLR_HOME/example/solr/conf

SOLR plugin installation
--------------------------------
I open the war (importing with eclipse)
I deleted from lib solr-common.jar and solr-solrj.jar and I put in place of them apache-solr-solrj-3.1.0.jar
I exported the war in liferay-portal-6.0.6/deploy
I started liferay and I receive an exception:
-----------------------------------------------------------------------------------------------
INFO: Deploying web application directory solr-web
log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [WebappClassLoader
context: /solr-web
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@10849bc
] whereas object of type
log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by [WebappClassLoader
context:
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@10849bc
].
log4j:ERROR Could not instantiate appender named "CONSOLE".
07:02:44,449 ERROR [ContextLoader:220] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageListener.solr_reader' defined in ServletContext resource [/WEB-INF/classes/META-INF/messaging-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.kernel.search.SearchEngine' while setting bean property 'searchEngine'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.kernel.search.SearchEngine' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.kernel.search.IndexSearcher' while setting bean property 'searcher'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.kernel.search.IndexSearcher' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' while setting bean property 'solrServer'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.liferay.portal.search.solr.server.BasicAuthSolrServer]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at com.liferay.portal.spring.context.PortletContextLoaderListener.contextInitialized(PortletContextLoaderListener.java:71)
at com.liferay.portal.kernel.servlet.PortalClassLoaderServletContextListener.doPortalInit(PortalClassLoaderServletContextListener.java:91)
at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:42)
at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:52)
at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:50)
at com.liferay.portal.kernel.servlet.PortalClassLoaderServletContextListener.contextInitialized(PortalClassLoaderServletContextListener.java:52)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.kernel.search.SearchEngine' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.kernel.search.IndexSearcher' while setting bean property 'searcher'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.kernel.search.IndexSearcher' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' while setting bean property 'solrServer'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.liferay.portal.search.solr.server.BasicAuthSolrServer]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
... 45 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.kernel.search.IndexSearcher' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Cannot resolve reference to bean 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' while setting bean property 'solrServer'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.liferay.portal.search.solr.server.BasicAuthSolrServer]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
... 55 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.liferay.portal.search.solr.server.BasicAuthSolrServer' defined in ServletContext resource [/WEB-INF/classes/META-INF/solr-spring.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.liferay.portal.search.solr.server.BasicAuthSolrServer]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1003)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:907)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
... 65 more
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.liferay.portal.search.solr.server.BasicAuthSolrServer]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:108)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280)
... 74 more

After this anyway I try to index contents by publishing them, or by indexing all together using the Reindex all search indexes in the admin panel: it seems to index but not using SOLR. If I go in the SOLR admin page I see 0 indexed documents: in the admin page the solr home seems ok (SolrHome=/Users/ale/Documents/CINI/Liferay6/apache-solr-3.1.0/example/solr/./ ).
I would like understand if SOLR doesn't work because I did something wrong in configuration, or if the problem is the exception, and SOLR is not correctly plugged in and Lucene is the search engine I'm using. In both cases how can I correct the problem?
Help me thanks.
Alex
alex wom
RE: Installing SOLR with Liferay 6
31. Mai 2011 07:15
Antwort

alex wom

Rang: Regular Member

Nachrichten: 166

Eintrittsdatum: 4. Mai 2009

Neue Beiträge

Anyone is available to help me?
Jelmer Kuperus
RE: Installing SOLR with Liferay 6
31. Mai 2011 13:10
Antwort

Jelmer Kuperus

Rang: Liferay Legend

Nachrichten: 1192

Eintrittsdatum: 10. März 2010

Neue Beiträge

The problem you are seeing is caused by this exception

Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory

The latest version of solrj depends on slf4j so you need to include that as a dependency by changing the portal-dependency-jars property in liferay-plugin-package.properties to this

1portal-dependency-jars=\
2    commons-codec.jar,\
3    commons-httpclient.jar,\
4    slf4j-api.jar,\
5    slf4j-log4j12.jar


Unfortunately the 6.0.6 plugin has some issues it wont work properly unless you make some changes to SolrIndexSearcherImpl

Here's a patch for that :

 1--- a/liferay-plugins-sdk/webs/solr-web/docroot/WEB-INF/src/com/liferay/portal/search/solr/SolrIndexSearcherImpl.java
 2+++ b/liferay-plugins-sdk/webs/solr-web/docroot/WEB-INF/src/com/liferay/portal/search/solr/SolrIndexSearcherImpl.java
 3@@ -26,11 +26,7 @@ import com.liferay.portal.kernel.search.IndexSearcher;
 4 import com.liferay.portal.kernel.search.Query;
 5 import com.liferay.portal.kernel.search.SearchException;
 6 import com.liferay.portal.kernel.search.Sort;
 7-import com.liferay.portal.kernel.util.StringBundler;
 8-import com.liferay.portal.kernel.util.StringPool;
 9-import com.liferay.portal.kernel.util.StringUtil;
10-import com.liferay.portal.kernel.util.Time;
11-import com.liferay.portal.kernel.util.Validator;
12+import com.liferay.portal.kernel.util.*;
13
14 import java.util.Collection;
15 import java.util.HashSet;
16@@ -156,12 +152,15 @@ public class SolrIndexSearcherImpl implements IndexSearcher {
17
18             Collection<String> names = solrDocument.getFieldNames();
19
20-            for (String name : names) {
21-                Field field = new Field(
22-                    name, solrDocument.getFieldValue(name).toString(), false);
23+            for (String name : names) {
24+                Field field = new Field(
25+                    name,
26+                    ArrayUtil.toStringArray(
27+                            solrDocument.getFieldValues(name).toArray()), false);
28+
29+                document.add(field);
30+            }
31
32-                document.add(field);
33-            }
34
35             float score = Float.valueOf(
36                 solrDocument.getFieldValue("score").toString());
Jelmer Kuperus
RE: Installing SOLR with Liferay 6
31. Mai 2011 13:14
Antwort

Jelmer Kuperus

Rang: Liferay Legend

Nachrichten: 1192

Eintrittsdatum: 10. März 2010

Neue Beiträge

Also the schema.xml included in the plugin did not work out for me , right now i am using the attached schema
but i havent't used it long enough to know if this will finally solve all issues i had with the solr plugin
Anhänge: schema.xml (6,5k)
Rex Petersen
RE: Installing SOLR with Liferay 6
31. Mai 2011 14:40
Antwort

Rex Petersen

Rang: New Member

Nachrichten: 11

Eintrittsdatum: 10. März 2011

Neue Beiträge

I had to use Apache SOLR version 1.4.x to avoid compatibility errors between solr and solr-web.
Hitoshi Ozawa
RE: Installing SOLR with Liferay 6
31. Mai 2011 15:12
Antwort

Hitoshi Ozawa

Rang: Liferay Legend

Nachrichten: 7990

Eintrittsdatum: 23. März 2010

Neue Beiträge

Do you know if there's an issue on this in the jira? I remember modifying the code myself too but wondered because the question came up here.
Jelmer Kuperus
RE: Installing SOLR with Liferay 6
31. Mai 2011 22:42
Antwort

Jelmer Kuperus

Rang: Liferay Legend

Nachrichten: 1192

Eintrittsdatum: 10. März 2010

Neue Beiträge

As usual the code change i made they already implemented on the trunk so i didn't raise an issue. for the schema issue i created LPS-17569

The solr plugin kind of feels flawed by design though. since you have to know in advance which fields will be indexed and which of those fields should be multivalued. so if you install a new plugin it might now work correctly unless you update your schema. and worse you might not get it to work at all

suppose you have two plugins that both write to the myid field , plugin 1 writes a single value to it and uses the field to sort, and plugin 2 writes multiple values to this field.

You'd now have an issue
alex wom
RE: Installing SOLR with Liferay 6
19. Juni 2011 23:42
Antwort

alex wom

Rang: Regular Member

Nachrichten: 166

Eintrittsdatum: 4. Mai 2009

Neue Beiträge

Sorry but, even if SOLR seems to work (I updated all as you suggested, also schema.xml to avoid exception on delete documents), when I start the system I receive this without exception...

log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [WebappClassLoader
context: /solr-web
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@27bc82e7
] whereas object of type
log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by [WebappClassLoader
context:
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@27bc82e7
].
log4j:ERROR Could not instantiate appender named "CONSOLE".
Raja Nagendra Kumar
RE: Installing SOLR with Liferay 6
19. Juni 2011 23:56
Antwort

Raja Nagendra Kumar

Rang: Expert

Nachrichten: 484

Eintrittsdatum: 1. März 2006

Neue Beiträge

Check if you have multiple log4j jar files in different webcontexts..

Regards,
Raja Nagendra Kumar,
C.T.O
www.tejasoft.com
-Services 3.0 - Work Focused Costing as Opposed to Bodies or CV selling.
Farrel Chen
RE: [SOLVED] Installing SOLR with Liferay 6
29. November 2011 12:30
Antwort

Farrel Chen

Rang: New Member

Nachrichten: 18

Eintrittsdatum: 20. April 2011

Neue Beiträge

How did you solve this problem? I have exactly the same problem integrating solr 3.4 with liferay 6.0.6.

I tried updating liferay-plugin-package.properties(the one under webapps/solr-web) and patching SolrIndexSearcherImpl as suggested by Jelmer, but that didn't solve my problem. Please help. Thanks a bunch!
Wole Adetiba
RE: [SOLVED] Installing SOLR with Liferay 6
11. August 2012 07:54
Antwort

Wole Adetiba

Rang: New Member

Nachrichten: 10

Eintrittsdatum: 9. November 2007

Neue Beiträge

Hi,

This might not be useful anymore but just wanted to add what I did when I had similar problem. Like it was pointed out here, http://issues.liferay.com/browse/LPS-9376?focusedCommentId=137451&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-137451, I started having same problem after I started using log4j logging in the service layer. I removed all my references to log4j at service layer, changed them to use Liferay logging, redeployed the portlet plugins. This solved the problem for me.

Wole