Error while doing GetComponentParts in MEF

While doing GetComponentParts I am getting following error, to be specific it reporoduces while i do import in continuous loop while handling multiple messages 开发者_Go百科in my WCF application

The composition produced a single composition error. The root cause is provided below. Review the CompositionException.Errors property for more detailed information.

1) The composition failed because it did not complete within '100' iterations. This is most likely caused by a cycle in the dependency graph of a part which is marked with a non-shared creation policy.

One more thing I cant locate CompositionException.Errors to find the root cause.

Please suggest what workaround possible, as i am not getting a single thread on the net suggesting any way...

Many Thanks

Since this is working most of the time, it is probably a threading issue which is corrupting MEF's internal state and causing this error.

When using a CompositionContainer from multiple threads, you need to create it with the isThreadSafe parameter set to true, and avoid calling methods which modify what is available - such as Compose, ComposeParts, or AddExportedValue.

Methods which are safe to call are the GetExport and SatisfyImports methods.