jolshan commented on code in PR #14629:
URL: https://github.com/apache/kafka/pull/14629#discussion_r1372377851
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core/src/main/scala/kafka/server/KafkaRequestHandler.scala:
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@@ -55,23 +55,23 @@ object KafkaRequestHandler {
* @param fun Callback function to execute
* @return Wrapped callback that would execute `fun` on a request thread
*/
- def wrap[T](fun: T => Unit): T => Unit = {
+ def wrap[T](fun: (RequestLocal, T) => Unit, requestLocal: RequestLocal): T
=> Unit = {
val requestChannel = threadRequestChannel.get()
val currentRequest = threadCurrentRequest.get()
if (requestChannel == null || currentRequest == null) {
if (!bypassThreadCheck)
throw new IllegalStateException("Attempted to reschedule to request
handler thread from non-request handler thread.")
- T => fun(T)
+ T => fun(requestLocal, T)
} else {
T => {
- if (threadCurrentRequest.get() != null) {
- // If the callback is actually executed on a request thread, we can
directly execute
+ if (threadCurrentRequest.get() == currentRequest) {
+ // If the callback is actually executed on the same request thread,
we can directly execute
Review Comment:
Sorry maybe I'm not explaining myself well.
We saw problems before when the callback was scheduled before the request
returned. We fixed it by adding this check.
If we want to remove this check, we will need to do further investigation
for that case.
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