Fix LB timeout in QueryServer
#893
Closed
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Description
The query server takes quite a while to process incoming requests. But, most load balancers timeout before the computation can be completed.
As a temporary fix, this PR configures the query handler to send a one byte HTTP 202 response after waiting for
P_PROXY_TIMEOUT - 5
seconds if the computation hasn't finished. The client can then reach back out with the same query after a while. If the results are ready, the server responds, or it times out again. The result persists in the cache and can be reused for the same query later.This PR has: