siddharthteotia commented on PR #8892:
URL: https://github.com/apache/pinot/pull/8892#issuecomment-1156544469
Was just reading the code again.
If you are referring to the delay in the following callback/listener, then I
can see it will affect the `requestSentLatency`.
```
`_channel.writeAndFlush(Unpooled.wrappedBuffer(requestBytes)).addListener(f
-> {
long requestSentLatencyMs = System.currentTimeMillis() - startTimeMs;
_brokerMetrics.addTimedTableValue(rawTableName,
BrokerTimer.NETTY_CONNECTION_SEND_REQUEST_LATENCY,
requestSentLatencyMs, TimeUnit.MILLISECONDS);
asyncQueryResponse.markRequestSent(serverRoutingInstance,
requestSentLatencyMs);
});`
```
However, `responseDelayMs` is computed from `_receiveDataTableTimeMs` and
`_submitRequestTimeMs`. The latter one is computed outside the callback in the
`QueryRouter` code which makes me wonder even if Netty slows a bit in invoking
the above listener, it should not affect the `_submitRequestTimeMs` ?
```
` try {
serverChannels.sendRequest(rawTableName, asyncQueryResponse,
serverRoutingInstance, entry.getValue(),
timeoutMs);
asyncQueryResponse.markRequestSubmitted(serverRoutingInstance);
}`
```
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