The ClassUtil class is not thread-safe -------------------------------------- Key: JBPM-1139 URL: http://jira.jboss.com/jira/browse/JBPM-1139 Project: JBoss jBPM Issue Type: Bug Components: Core Engine Affects Versions: jBPM jPDL 3.2.3 Reporter: Wojciech Gdela Assigned To: Tom Baeyens Attachments: ClassUtil-concurrency-issue.zip The ClassUtil class is not thread-safe. The exception will occur when two thread simultanously try do deserialize variables from two different process definitions. Look at the code: {code} public ContextObjectInputStream(final InputStream in, ProcessInstance processInstance) throws IOException { super(in); this.setProcessInstance(processInstance); ClassUtil.setProcessInstance(processInstance); } ... protected Class resolveClass(final ObjectStreamClass desc) throws IOException, ClassNotFoundException { return ClassUtil.forName(desc.getName(), ContextObjectInputStream.class); } ... ContextObjectInputStream cois = new ContextObjectInputStream(bais, definition.createProcessInstance()); // when here another thread tries to execute the same code with another process instance there will be a problem return cois.readObject(); {/code} Further description of issue is in attached test case. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira