WebSocketProxyTest is a new test that was added recently. It fails once in every few hundred runs. The test uses a preexisting test-only proxy server. There is a race when closing the server; the close method iterates over all connections while another thread may be adding a new connection. The solution proposed here is to take a copy of the connection list and iterate over it, rather than the connection list itself. ( I also did a little clean up and added some consistency to proxy debug messages, since it was more difficult to reason about the test's behavior from its log than it should have been )
http://cr.openjdk.java.net/~chegar/8217976/webrev.00/ -Chris.
