StevenLuMT commented on code in PR #3522:
URL: https://github.com/apache/bookkeeper/pull/3522#discussion_r996371394
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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:
> if we disable it by default nobody will use it, it will fall into the
basket of "experimental features"
have a look @nicoloboschi @gaozhangmin
I have update the code, when check masterKey exists in cache before write
```
// Force the load into masterKey cache
byte[] oldValue = masterKeyCache.asMap().putIfAbsent(ledgerId, masterKey);
```
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