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https://issues.apache.org/jira/browse/WW-4310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15879574#comment-15879574
 ] 

Tran Anh Tung commented on WW-4310:
-----------------------------------

[~yasser.zamani] My Struts version: struts2-core-2.3.16.3, Ognl version: 
ognl-3.0.4

I do not got same stack as above.

This is my production environment log4.properties, with this setting I think 
the warning is not showing.
{code:properties|title=log4j.properties}
# Define the root logger with appender file
log4j.rootLogger = INFO, FILE

# Define the file appender
log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender

# Set the name of the file
log4j.appender.FILE.File=/path/Log.out

# Set the datePattern of the file
log4j.appender.FILE.DatePattern='_'yyyy-MM-dd

# Set the immediate flush to true (default)
log4j.appender.FILE.ImmediateFlush=true

# Set the threshold to debug mode
log4j.appender.FILE.Threshold=debug

# Set the append to false, should not overwrite
log4j.appender.FILE.Append=true

# Define the layout for file appender
log4j.appender.FILE.layout=com.app.framework.logging.AppPatternLayout
log4j.appender.FILE.layout.ConversionPattern=[%d] %p Hsiharai %u %x - %m%n
{code}

We can reproduce in Integration Environment (randomly when restart Websphere 
Application Server) so we can use your modified Struts and Ognl jars.
Sorry but can you also send your modified source code as well, as we can add 
some more details.

Thank you.

> All form submission failed due to ognl.OgnlException: target is null for 
> setProperty
> ------------------------------------------------------------------------------------
>
>                 Key: WW-4310
>                 URL: https://issues.apache.org/jira/browse/WW-4310
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Core Interceptors, Expression Language, Integration
>    Affects Versions: 2.3.15.1
>         Environment: IBM AIX 6.1.0.0
> Websphere Application server 7.0.0.21
> Websphere Portal server 7.0.0.2  
>            Reporter: chenlin
>             Fix For: Future
>
>
> Hi Lukasz Lenart ,
> We are using struts-portlet framework in Websphere Portal server clustering ( 
> 1 Deploy Manager and 4 Portal servers instances) in production. 
> Currently there is one issue happen in one of 4 servers randomly.  The 
> exception is showing login form in set Property is null in one server, but at 
> that time other 3 servers are working fine. This issue can happen in any one 
> of 4 servers  in our production environment. We have also raised few PMR  to  
> IBM team for this issue. But IBM  said it is not caused by them.  We need 
> your help to check if any possible way to cause this issue in struts.  
> If possible, pls share us your avaliable timing and contact, we would like to 
> have a call with you and IBM support to identify root cause. 
>    
>  ===IBM response=============
> When I refer the past PMR ( 18484,000,834)  we shared on all the findings and 
> waiting for your Application team feedback,  as such I don't think any  
> further action pending on  IBM Support end. do check with Application team 
> and  can we ask Application team not using 
> the code what Application team using is  not an IBM  API / service code "     
>                     
> com.opensymphony.xwork2.util.logging.commons.CommonsLogger" , good to   
> check with Application team to discuss with respective vender. 
>     
> The  above error code from strut's application code, check with Application 
> support and ask them to explore further. 
> As  I hope we all are in same page now, as  PMR 20364,000,834  & PMR 
> 18184,000,834  - findings Pointing same  struts2 loging function, even 
> application team explore why they enabled this log ? ,how this impacted the  
> Application Interface page with user login error.
> =====Error Log========
> [3/18/14 1:58:12:142 GMT+08:00] 00000062 OgnlValueStac W 
> com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn Error setting 
> expression 'loginForm.userId' with value '[Ljava.lang.String;@1560156'
>                                 ognl.OgnlException: target is null for 
> setProperty(null, "userId", [Ljava.lang.String;@1560156)
>    at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2326)
>    at ognl.ASTProperty.setValueBody(ASTProperty.java:127)
>    at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
>    at ognl.SimpleNode.setValue(SimpleNode.java:301)
>    at ognl.ASTChain.setValueBody(ASTChain.java:227)
>    at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
>    at ognl.SimpleNode.setValue(SimpleNode.java:301)
>    at ognl.Ognl.setValue(Ognl.java:737)
>    at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:234)
>    at 
> com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:183)
>    at 
> com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:170)
>    at 
> com.opensymphony.xwork2.ognl.OgnlValueStack.setParameter(OgnlValueStack.java:148)
>    at 
> com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:318)
>    at 
> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:231)
>    at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)



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