[GitHub] [pulsar] codelipenghui commented on a change in pull request #5227: [PIP-44] Separate schema compatibility checker for producer and consumer

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codelipenghui commented on a change in pull request #5227: [PIP-44] Separate schema compatibility checker for producer and consumer
URL: https://github.com/apache/pulsar/pull/5227#discussion_r333416528
 
 

 ##########
 File path: pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java
 ##########
 @@ -19,12 +19,27 @@
 package org.apache.pulsar.broker.service.persistent;
 
 import com.carrotsearch.hppc.ObjectObjectHashMap;
+
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
+
 import io.netty.buffer.ByteBuf;
 import io.netty.util.concurrent.FastThreadLocal;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLongFieldUpdater;
 
 Review comment:
   Remove the unused imports

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