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https://issues.apache.org/jira/browse/WW-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lukasz Lenart resolved WW-3582.
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Resolution: Fixed
Fix Version/s: 2.2.2
Assignee: Lukasz Lenart
Solved, thanks!
> Token Interceptor is holding HttpSession lock which can trigger deadlocks
> -------------------------------------------------------------------------
>
> Key: WW-3582
> URL: https://issues.apache.org/jira/browse/WW-3582
> Project: Struts 2
> Issue Type: Bug
> Components: Core Interceptors
> Affects Versions: 2.2.1
> Environment: Any (windows/Linux)
> Reporter: Lucy
> Assignee: Lukasz Lenart
> Fix For: 2.2.2
>
>
> In class TokenInterceptor::doIntercept() function, it was using HttpSession
> lock when check tokens, it should release the lock before calling
> invocation.invoke().
> Because invocation.invoke() was called inside the httpsession lock, it will
> hold the lock until all the other intercetors listed after the token
> interceptor have been processed.
> (This triggered a dead lock in our software environment.)
> It should release the lock before it calls invocation.invoke();
> protected String doIntercept(ActionInvocation invocation) throws Exception {
> if (log.isDebugEnabled()) {
> log.debug("Intercepting invocation to check for valid transaction
> token.");
> }
> //see WW-2902: we need to use the real HttpSession here, as opposed
> to the map
> //that wraps the session, because a new wrap is created on every
> request
> HttpSession session =
> ServletActionContext.getRequest().getSession(true);
> synchronized (session) {
> if (!TokenHelper.validToken()) {
> return handleInvalidToken(invocation);
> }
> return handleValidToken(invocation);
> }
> }
> protected String handleValidToken(ActionInvocation invocation) throws
> Exception {
> return invocation.invoke(); <------------------------- this line
> needs to be moved out of the session lock.
> }
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