[GitHub] [bookkeeper] StevenLuMT commented on a diff in pull request #3522: Change masterKeyCache to dynamic size

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

StevenLuMT commented on code in PR #3522:
URL: https://github.com/apache/bookkeeper/pull/3522#discussion_r991090032


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bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/BookieImpl.java:
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@@ -935,9 +936,10 @@ private void addEntryInternal(LedgerDescriptor handle, ByteBuf entry,
 
         // journal `addEntry` should happen after the entry is added to ledger storage.
         // otherwise the journal entry can potentially be rolled before the ledger is created in ledger storage.
-        if (masterKeyCache.get(ledgerId) == null) {
+        if (masterKeyCache.getIfPresent(ledgerId) == null) {
             // Force the load into masterKey cache
-            byte[] oldValue = masterKeyCache.putIfAbsent(ledgerId, masterKey);
+            byte[] oldValue = masterKeyCache.getIfPresent(ledgerId);
+            masterKeyCache.put(ledgerId, masterKey);
             if (oldValue == null) {

Review Comment:
   @gaozhangmin it doesn't matter:
   the masterKey of the same ledgerID is the same. This is only to prevent multiple writes. If it occurs multiple times, there is no risk. It will only cover the information when the journal does relay.



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