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SockJS / XHR Polling does not reset connection for heartbeat [SPR-14107] #18679
In AbstractHttpSockJsSession, writeFrameInternal method:
The final this.response.flush(); call is insufficient to reset the polling connection for heartbeat. Should be something like resetRequest(); as in the 4.1.9 release.
Possibly we meant to call flushCache() in PollingSockJsSession?
Affects: 4.2.1, 4.2.2, 4.2.3, 4.2.4, 4.2.5