Comments (1)
@dimalukas this sounds like tcp keepalive.
See: https://tldp.org/HOWTO/TCP-Keepalive-HOWTO/overview.html
This occurs at the TCP/transport level, before the HTTP/application level. So there will be no http data being sent, but you will see at the lower TCP level some zero-data ACKs that are part of the tcp-keepalive. The keep alive time is configurable usually at the OS level, not at a per-socket or per-application level.
Without keep-alives, there'd be no way for each side of the connection to know when a connection gets dropped.
This occurs at a lower, more fundamental level than HTTP and golongpoll specifically. I'd recommend looking at the traffic in wireshark or similar tool to verify that this is indeed zero-data keepalive traffic if you are concerned.
To your question about being "silent" until there is data (or a longpoll-timeout)--at the HTTP/application level, yes, there should be no data/communication.
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