Fix

Author: AnonHxy

bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorageRocksDB.java

@@ -433,6 +433,7 @@ public void compact(byte[] firstKey, byte[] lastKey) throws IOException {
     public void compact() throws IOException {
         readLock.lock();
         try {
+            throwIfClosed();
             final long start = System.currentTimeMillis();
             final int oriRocksDBFileCount = db.getLiveFilesMetaData().size();
             final long oriRocksDBSize = getRocksDBSize();