Race condition in MVELDialectRuntimeData.getParserConfiguration --------------------------------------------------------------- Key: DROOLS-1359 URL: https://issues.jboss.org/browse/DROOLS-1359 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 5.5.0.Final, 6.5.0.Final Reporter: Anuj Shah Assignee: Mario Fusco MVELDialectRuntimeData attempts to hold a lazy loaded ParserConfiguration. The getParserConfiguration method sets this to a new configuration object and then sets the imports on the configuration. Between these two steps another thread could retrieve the stale configuration and use it. This could result in a number of exceptions in compilation. A simple fix is to delay assignment of new ParserConfiguration until after the imports are set.