divijvaidya commented on code in PR #14511:
URL: https://github.com/apache/kafka/pull/14511#discussion_r1356830611
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storage/src/main/java/org/apache/kafka/storage/internals/log/RemoteIndexCache.java:
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@@ -137,15 +138,8 @@ public RemoteIndexCache(long maxSize, RemoteStorageManager
remoteStorageManager,
public void resizeCacheSize(long remoteLogIndexFileCacheSize) {
lock.writeLock().lock();
try {
- // When resizing the cache, we always start with an empty cache.
There are two main reasons:
- // 1. Resizing the cache is not a high-frequency operation, and
there is no need to fill the data in the old
- // cache to the new cache in time when resizing inside.
- // 2. Since the eviction of the caffeine cache is cleared
asynchronously, it is possible that after the entry
- // in the old cache is filled in the new cache, the old cache will
clear the entry, and the data in the two caches
- // will be inconsistent.
- internalCache.invalidateAll();
- log.info("Invalidated all entries in the cache and triggered the
cleaning of all index files in the cache dir.");
- internalCache = initEmptyCache(remoteLogIndexFileCacheSize);
+ internalCache.policy().eviction().orElseThrow(() -> new
NoSuchElementException("No eviction policy is set for the remote index cache.")
Review Comment:
Ah! I think the difference is that we use a builder to construct a new cache
in initCache() whereas we want to access a method (policy()) on existing cache
over here.
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