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From "Jarek Gawor (JIRA)" <>
Subject [jira] Created: (CXF-323) Improper synchronization of getDefaultBus(), setDefaultBus()
Date Fri, 22 Dec 2006 04:27:21 GMT
Improper synchronization of getDefaultBus(), setDefaultBus()

                 Key: CXF-323
             Project: CXF
          Issue Type: Bug
            Reporter: Jarek Gawor

getDefaultBus() method in org.apache.cxf.bus.spring.SpringBusFactory and org.apache.cxf.bus.cxf.CXFBusFactory
is improperly synchronized. The method is instance-level synchronized while it initializes
and accesses a class-level variable. Two different instances of BusFactory each calling getDefaultBus()
at the same time could return two different Bus instances...

This method should either be changed to 'public static synchronized Bus getDefaultBus()' or
modified as for an example:

public Bus getDefaultBus() {
  return initDefaultBus();

private static synchronized Bus initDefaultBus() {
  if (null == defaultBus) {
         defaultBus = new CXFBusImpl();
  return defaultBus;

Also, the setDefaultBus() method in both classes needs to be properly synchronized. 

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