getProcessRuntimeFactoryService method of ProcessRuntimeFactory is synchronized. -------------------------------------------------------------------------------- Key: DROOLS-787 URL: https://issues.jboss.org/browse/DROOLS-787 Project: Drools Issue Type: Bug Affects Versions: 6.3.0.Final, 6.4.0.Beta1 Environment: software platform Reporter: vipul gajara Assignee: Petr Široký Fix For: 7.0.0.Final getProcessRuntimeFactoryService is getter method of singleton class "org.drools.core.runtime.process.ProcessRuntimeFactory" but this method is static synchronized so at a time only one thread can call it . Due to above issue when we are using drools in multi threaded enviorenment threads are getting locked at this method and performance degrades when creating KSession objects.