marchpure commented on a change in pull request #3978:
URL: https://github.com/apache/carbondata/pull/3978#discussion_r503242850



##########
File path: 
integration/spark/src/main/scala/org/apache/spark/sql/execution/command/mutation/CarbonProjectForUpdateCommand.scala
##########
@@ -235,14 +237,38 @@ private[sql] case class CarbonProjectForUpdateCommand(
         }
         sys.error("Update operation failed. please check logs.")
     } finally {
-      if (null != dataSet && isPersistEnabled) {
-        dataSet.unpersist()
+      if (updateLock.unlock()) {
+        LOGGER.info(s"updateLock unlocked successfully after update operation 
$tableName")
+      } else {
+        LOGGER.error(s"Unable to unlock updateLock for table $tableName after 
table updation");

Review comment:
       I have modified code according to your suggestion




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