Bug 994

I'm running multiple ORB instances (each with different properties) within a single JVM. The differnt ORB instances are initialized in parallel on multiple threads. All goes well until today where I got a NullPointerException during orb initialization:
java.lang.NullPointerException
at org.omg.CONV_FRAME.CodeSetComponentHelper.write(CodeSetComponentHelper.java:68)
at org.omg.CONV_FRAME.CodeSetComponentInfoHelper.write(CodeSetComponentInfoHelper.java:68)
at org.jacorb.orb.standardInterceptors.CodeSetInfoInterceptor.<init>(CodeSetInfoInterceptor.java:57)
at org.jacorb.orb.standardInterceptors.IORInterceptorInitializer.post_init(IORInterceptorInitializer.java:61)
at org.jacorb.orb.ORB.interceptorPostInit(ORB.java:2147)
at org.jacorb.orb.ORB.internalInit(ORB.java:2005)
at org.jacorb.orb.ORB.set_parameters(ORB.java:1953)
at org.omg.CORBA.ORB.init(ORB.java:251)

After some digging in the code, I've found out that the problem lies in org.jacorb.orb.giop.CodeSet's method "getLocalCodeSetComponentInfo" which is not correctly implemented for concurrent access: In this method a first thread can have created "localCodeSetComponentInfo" but not filled in the field "ForCharData" yet and a second thread can then return this half initialized "localCodeSetComponentInfo" object as the first check on "localCodeSetComponentInfo" being null is not within the synchronized block.