cxzl25 commented on code in PR #37015:
URL: https://github.com/apache/spark/pull/37015#discussion_r908351409
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common/network-common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java:
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@@ -158,10 +158,12 @@ public void userEventTriggered(ChannelHandlerContext ctx,
Object evt) throws Exc
// To avoid a race between TransportClientFactory.createClient() and
this code which could
// result in an inactive client being returned, this needs to run in a
synchronized block.
synchronized (this) {
+ // Do not modify the order of hasInFlightRequests and
isActuallyOverdue (see SPARK-27073)
+ boolean hasInFlightRequests = responseHandler.hasOutstandingRequests();
boolean isActuallyOverdue =
System.nanoTime() - responseHandler.getTimeOfLastRequestNs() >
requestTimeoutNs;
if (e.state() == IdleState.ALL_IDLE && isActuallyOverdue) {
- if (responseHandler.hasOutstandingRequests()) {
+ if (hasInFlightRequests) {
Review Comment:
Are you referring to adding more comments to the code, or explaining why
this happens in this PR?
Original PR #23989 should explain:
> When TransportChannelHandler processes IdleStateEvent, it first calculates
whether the last request time has timed out.
At this time, TransportClient.sendRpc initiates a request.
TransportChannelHandler gets responseHandler.numOutstandingRequests() > 0,
causing the normal connection to be closed.
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