[weld-issues] [JBoss JIRA] Issue Comment Edited: (WELD-862) Interceptors not threadsafe

Interceptors not threadsafe --------------------------- Key: WELD-862 URL: https://issues.jboss.org/browse/WELD-862 Project: Weld Issue Type: Bug Components: Interceptors and Decorators Affects Versions: 1.1.0.Final Environment: Jetty, Weld Filter Reporter: Sebastian Schaffert I am trying to implement an "@Asynchronous" interceptor that runs methods annotated with the @Asynchronous annotation in a separate thread. The implementation of the interceptor currently looks as follows: private static final ThreadGroup asyncMethods = new ThreadGroup("asynchronous method invocations"); @AroundInvoke public Object manageAsynchronous(final InvocationContext ctx) throws Exception { final UUID threadID = UUID.randomUUID(); Runnable r = new Runnable() { @Override public void run() { try { log.debug("asynchronous method invocation of {}.{} (Thread ID {})",new Object[] {ctx.getTarget().getClass().getName(),ctx.getMethod().getName(), threadID}); Object val = ctx.proceed(); if(val != null) { log.debug("asynchronous method invocation of {}.{} (Thread ID {}) returned value {}",new Object[] {ctx.getClass().getName(),ctx.getMethod().getName(), threadID, val}); } } catch(Exception ex) { log.error("exception during asynchronous method invocation",ex); } } }; Thread t = new Thread(asyncMethods,r); t.setName("asynchronous method invocation of "+ctx.getTarget().getClass().getName()+ctx.getMethod().getName() + " (Threaad ID " + threadID+")"); t.start(); return null; } Now the problem is that the interceptor is called infinitely often. The reason is that the annotated method forks a new thread and then returns instantly, setting the variable "currentPosition" in SimpleInterceptorChain back to the value 0 (in a "finally" block). So when the proceed() method is called inside the thread, the interceptor chain again points to the first interceptor in the chain and it all repeats infinitely.