Replace for loops with forEach in RSocketClient/Server to fix non-deterministic behavior#556
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…erministic behavior Signed-off-by: Ryland Degnan <ryland@netifi.com>
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I encountered a null pointer exception inside RSocketClient::cleanUpSubscriber because subscriber was null. The only way this could happen is if the receivers map is modified while it is being iterated over. The solution is to use the forEach method instead of iterator, which is properly synchronized.