Rossen Stoyanchev 8f19650fd7 Avoid locking in WebSocket session "close" callback ...

When processing a "close" notification from the server make an effort
to cancel any outstanding heartbeat but avoid going as far as acquiring
the responseLock since the server itself may already hold a lock of its
own leading to a potential deadlock.

The heartbeat task is now also further protected with an isClosed()
check in case the heartbeat does not get cancelled in a concurrent
scenario.

Issue: SPR-14917

2016-11-23 20:58:22 -05:00

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src

Avoid locking in WebSocket session "close" callback

2016-11-23 20:58:22 -05:00