A112 Keepalive fixed interval #534
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ejona86
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Jan 23, 2026
A112-keepalive-fixed-interval.md
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| Keepalive PINGs are only sent when the HTTP/2 connection did not receive data for `KEEPALIVE_TIME`. | ||
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| L7 load balancers may be configured to load balance the HTTP/2 streams inside the HTTP/2 connection to different servers. Although HTTP/2 PINGS are forwarded in both directions by the L7 load balancer unexpected connection drops can occur because a keepalive PING is not sent. |
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HTTP/2 PINGs aren't forwarded by L7 load balancers. PING is point-to-point, so the LB would need to do its own PINGs to backends if that is what it desires.
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I removed the forwarding part from the proposal.
The example in the proposal is a real example. I 'solved' this L7 load balancer behavior by implementing a fixed keepalive interval.
I think the real question is if the grpc team wants to implement this kind of features to compensate bad implemented/configured load balancers.
I can perfectly understand that you do not want to do this.
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