Hello, I've just logged a JIRA issue (includes test case) for a deadlock situation that I'm encountering - https://issues.apache.org/jira/browse/TUSCANY-3964
>From a thread dump it looks like all threads are stuck in - org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:518) Adding a synchronized to org.apache.tuscany.sca.binding.ws.axis2.provider.Axis2ReferenceBindingInvoker.invoke(Message msg) seems to fix the problem, but I'm afraid that it will introduce a performance bottleneck and is not the appropriate solution. Is anybody able to shed more light on this? Appreciate any help, thanks. Anuj