EJTTianYu commented on a change in pull request #2398:
URL: https://github.com/apache/iotdb/pull/2398#discussion_r550436003
##########
File path:
server/src/main/java/org/apache/iotdb/db/engine/merge/task/MergeFileTask.java
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@@ -19,11 +19,17 @@
package org.apache.iotdb.db.engine.merge.task;
+import static
org.apache.iotdb.tsfile.common.constant.TsFileConstant.TSFILE_SUFFIX;
+
import java.io.File;
import java.io.IOException;
+import java.util.HashMap;
+import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
+import java.util.Set;
Review comment:
unused import can be deleted by idea using ```control+option+O```
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