feat(db/checkPointV2Store): change log level from info to debug for c…

…lose (#5499)

chainbase/src/main/java/org/tron/core/store/CheckPointV2Store.java

@@ -1,6 +1,7 @@
 package org.tron.core.store;
 
 import com.google.protobuf.InvalidProtocolBufferException;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.tron.core.db.TronDatabase;
 import org.tron.core.exception.BadItemException;
@@ -9,6 +10,7 @@
 import java.util.Spliterator;
 import java.util.function.Consumer;
 
+@Slf4j(topic = "DB")
 public class CheckPointV2Store extends TronDatabase<byte[]> {
 
   @Autowired
@@ -50,4 +52,19 @@ public Spliterator spliterator() {
   protected void init() {
   }
 
+  /**
+   * close the database.
+   */
+  @Override
+  public void close() {
+    logger.debug("******** Begin to close {}. ********", getName());
+    try {
+      dbSource.closeDB();
+    } catch (Exception e) {
+      logger.warn("Failed to close {}.", getName(), e);
+    } finally {
+      logger.debug("******** End to close {}. ********", getName());
+    }
+  }
+
 }