Python_Max created ZEPPELIN-1754:
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Summary: PING request stacking on websocket reconnect
Key: ZEPPELIN-1754
URL: https://issues.apache.org/jira/browse/ZEPPELIN-1754
Project: Zeppelin
Issue Type: Bug
Components: front-end
Affects Versions: 0.6.2
Reporter: Python_Max
PING request should be executed every 10 seconds.
But when server gets restarted there will be one more setInterval() closure
stacking each time (see websocketEvents.factory.js -> websocketCalls.ws.onOpen).
Steps to reproduce:
1) build Zeppelin leaving console.log enabled
2) start ZeppelinServer, open any notebook in browser
3) open console with timestamps and check that PING request repeats exactly
once in every 10 second
4) restart ZeppelinServer but do not close or refresh the notebook page
5) wait for websocket connection reopened
6) check PING request frequency in console
It will be 2 PING requests in every 10 seconds. Expected only one. Repeating
steps 4-6 will add one more request per 10 seconds.
I think clearInterval() should be called in websocket's onClose() handler.
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