Hi All, Looking at the history of JIRA's (2170, 2085, 2092) raised due to ConcurrentModificationException, its evident that our runtime would throw more such exceptions in the coming days, such problem occurs if two threads try to add a contribution simultaneously. Also the above mentioned JIRA's gives us a clue that mostly these issues are noticed for the ExtensionPoint implementation classes.
Current Implementation of ExtensionPoint classes use either ArrayList OR HashMap to maintain the list of processors, listeners, factories and providers. Basically the Implementation of ArrayList & HashMap are not synchronized, hence If multiple threads try to access an ArrayList/HashMap instance concurrently, and at least one of the threads modifies the list/map structurally, it must be synchronized externally. Hence a fix is required for these classes, *please have a look at JIRA-2170 comments for more details on the implemented solution*. As a precautionary measure, I like to raise a JIRA for all the ExtensionPoint classes to provide this fix for the above said issue, before we encounter them one by one. Before I go ahead, I like to hear from people about their thought on this regard. Thanks. -- Thanks & Regards, Ramkumar Ramalingam
