samperson1997 commented on a change in pull request #1356:
URL: https://github.com/apache/incubator-iotdb/pull/1356#discussion_r439350970
##########
File path:
server/src/main/java/org/apache/iotdb/db/engine/cache/ChunkMetadataCache.java
##########
@@ -20,6 +20,7 @@
import java.io.IOException;
import java.util.ArrayList;
+import java.util.Collections;
Review comment:
useless import
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File path: server/src/main/java/org/apache/iotdb/db/engine/cache/ChunkCache.java
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@@ -93,40 +93,33 @@ public Chunk get(ChunkMetadata chunkMetaData,
TsFileSequenceReader reader) throw
try {
lock.readLock().lock();
- if (lruCache.containsKey(chunkMetaData)) {
+ Chunk chunk = lruCache.get(chunkMetaData);
+ if (chunk != null) {
cacheHitNum.incrementAndGet();
printCacheLog(true);
- Chunk chunk = lruCache.get(chunkMetaData);
return new Chunk(chunk.getHeader(), chunk.getData().duplicate(),
chunk.getDeletedAt());
}
} finally {
lock.readLock().unlock();
}
- Lock cacheLock = lock.writeLock();
Review comment:
useless import: `java.util.concurrent.locks.Lock`
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