jolshan commented on code in PR #14629:
URL: https://github.com/apache/kafka/pull/14629#discussion_r1375060752
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core/src/main/scala/kafka/server/KafkaRequestHandler.scala:
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@@ -53,25 +53,27 @@ object KafkaRequestHandler {
* Wrap callback to schedule it on a request thread.
* NOTE: this function must be called on a request thread.
* @param fun Callback function to execute
+ * @param requestLocal The RequestLocal for the current request handler
thread in case we need to call
+ * the callback function without queueing the callback
request
* @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) {
Review Comment:
We pass the wrapped method which is a simpler type. `type AppendCallback =
Map[TopicPartition, Errors] => Unit`
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