[GitHub] [bookkeeper] hangc0276 commented on a diff in pull request #3192: Fix compaction throttle imprecise

[GitBox <gi...@apache.org>]

hangc0276 commented on code in PR #3192:
URL: https://github.com/apache/bookkeeper/pull/3192#discussion_r846881714


##########
bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/EntryLogger.java:
##########
@@ -1014,10 +1041,18 @@ public void scanEntryLog(long entryLogId, EntryLogScanner scanner) throws IOExce
                 if (pos >= bc.size()) {
                     break;
                 }
-                if (readFromLogChannel(entryLogId, bc, headerBuffer, pos) != headerBuffer.capacity()) {
+
+                Pair<Integer, Integer> readBytesPair =
+                    readFromLogChannelWithPrefetchBytes(entryLogId, bc, headerBuffer, pos);
+                if (readBytesPair.getLeft() != headerBuffer.capacity()) {
                     LOG.warn("Short read for entry size from entrylog {}", entryLogId);
                     return;
                 }
+
+                if (throttler != null) {
+                    throttler.acquire(readBytesPair.getRight());

Review Comment:
   The release operation controlled by `RateLimiter` library in guava



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