kevin-wu24 commented on code in PR #19668:
URL: https://github.com/apache/kafka/pull/19668#discussion_r2114387246
##########
raft/src/main/java/org/apache/kafka/raft/RequestManager.java:
##########
@@ -62,30 +70,35 @@ public RequestManager(
}
/**
- * Returns true if there are any connections with pending requests.
+ * Returns true if there are any in-flight requests for a request type.
*
- * This is useful for satisfying the invariant that there is only one
pending Fetch request.
+ * This is useful for satisfying the invariant that there is only one
pending Fetch
+ * and FetchSnapshot request.
* If there are more than one pending fetch request, it is possible for
the follower to write
* the same offset twice.
*
* @param currentTimeMs the current time
- * @return true if the request manager is tracking at least one request
+ * @param wantRequestKey the request type to check for in-flight requests
+ * @return true if the request manager is tracking at least one request of
the given type
*/
- public boolean hasAnyInflightRequest(long currentTimeMs) {
+ public boolean hasAnyInflightRequest(long currentTimeMs, ApiKeys
wantRequestKey) {
boolean result = false;
- Iterator<ConnectionState> iterator = connections.values().iterator();
+ final var iterator = inflightRequests.entrySet().iterator();
while (iterator.hasNext()) {
- ConnectionState connection = iterator.next();
- if (connection.hasRequestTimedOut(currentTimeMs)) {
+ final var entry = iterator.next();
+ final var requestKey = entry.getKey().requestType().apiKey();
+ final var requestState = entry.getValue();
+ if (requestState.hasRequestTimedOut(currentTimeMs)) {
// Mark the node as ready after request timeout
iterator.remove();
- } else if (connection.isBackoffComplete(currentTimeMs)) {
+ } else if (requestState.isBackoffComplete(currentTimeMs)) {
// Mark the node as ready after completed backoff
iterator.remove();
- } else if (connection.hasInflightRequest(currentTimeMs)) {
+ } else if (requestKey == wantRequestKey &&
Review Comment:
Now that I think about this more, I think another way to enforce this is by
having the public RequestManager APIs themselves take in `RequestType`, not
`ApiKeys` parameter, since `RequestType` is what the manager actually deals
with.
This is the only method that doesn't take the `ApiKeys` parameter from the
caller and convert it to a `RequestType`. Is it better for the caller to
"provide" the correct data, or for the implementation correct it itself (i.e.
convert from `ApiKeys` to `RequestType` like in the other public methods)? I
think the former is better, because the code won't compile unless the `ApiKeys
-> RequestType` conversion occurs, but in the latter case a bug like this can
arise.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
