Add /debug/liveness handler for liveness checks. #4935
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This is a handler typically used for server liveness checks. If the server can't execute this simple handler, it probably isn't able to do useful work for other incoming requests that actually ask the server to do something. In that case, the watchdog usually assumes the server process is stuck (deadlocked or livelocked) and restarts it. Signed-off-by: Anthony Yeh <enisoc@planetscale.com>
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This is a handler typically used for server liveness checks. If the server can't execute this simple handler, it probably isn't able to do useful work for other incoming requests that actually ask the server to do something. In that case, the watchdog usually assumes the server process is stuck (deadlocked or livelocked) and restarts it.
Signed-off-by: Anthony Yeh enisoc@planetscale.com
Closes #4480.