[websocket-java11] Prevent infinite recursion in disconnect()
Guus reports the following infinite recursing causing a
StackOverflowError:
Exception in thread "main" java.lang.StackOverflowError
at org.jivesoftware.smack.websocket.java11.Java11WebSocket.disconnect(Java11WebSocket.java:142)
at org.jivesoftware.smack.websocket.XmppWebSocketTransportModule$XmppWebSocketTransport.disconnect(XmppWebSocketTransportModule.java:265)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection$CloseConnectionState.transitionInto(ModularXmppClientToServerConnection.java:1086)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.attemptEnterState(ModularXmppClientToServerConnection.java:472)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.walkStateGraphInternal(ModularXmppClientToServerConnection.java:399)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.walkStateGraph(ModularXmppClientToServerConnection.java:339)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.shutdown(ModularXmppClientToServerConnection.java:551)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.instantShutdown(ModularXmppClientToServerConnection.java:530)
at org.jivesoftware.smack.AbstractXMPPConnection.notifyConnectionError(AbstractXMPPConnection.java:1024)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.access$100(ModularXmppClientToServerConnection.java:134)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection$1.notifyConnectionError(ModularXmppClientToServerConnection.java:185)
at org.jivesoftware.smack.websocket.impl.AbstractWebSocket.onWebSocketFailure(AbstractWebSocket.java:128)
at org.jivesoftware.smack.websocket.java11.Java11WebSocket.onWebSocketFailure(Java11WebSocket.java:162)
at org.jivesoftware.smack.websocket.java11.Java11WebSocket.disconnect(Java11WebSocket.java:146)
at org.jivesoftware.smack.websocket.XmppWebSocketTransportModule$XmppWebSocketTransport.disconnect(XmppWebSocketTransportModule.java:265)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection$CloseConnectionState.transitionInto(ModularXmppClientToServerConnection.java:1086)
at org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection.attemptEnterState(ModularXmppClientToServerConnection.java:472)
...
This is because sendClose() in Java11WebSocket.disconnect() throws,
potentially because the output stream is already closed. We previously
would feed the exception into the onWebSocketFailure(Exception)
machinery, which would then again attempt a disconnect.
Since a failed sendClose() is nothing that needs special handling, we
simply log the exception as error. Furthermore, we only issue
sendClose() if the WebSocket's output is still open, i.e., if there is
a chance that it actually works.
[sinttest] Add UnconnectedConnectionSource for low-level tests
Previously low-level tests where run, potentially multiple times, with
the default connection descriptor.
