lirui-apache commented on a change in pull request #3790:
URL: https://github.com/apache/iceberg/pull/3790#discussion_r777817983



##########
File path: 
hive-metastore/src/test/java/org/apache/iceberg/hive/TestHiveMetastore.java
##########
@@ -144,13 +171,35 @@ public void stop() {
     if (executorService != null) {
       executorService.shutdown();
     }
-    if (hiveLocalDir != null) {
-      hiveLocalDir.delete();
-    }
     if (baseHandler != null) {
       baseHandler.shutdown();
     }
     METASTORE_THREADS_SHUTDOWN.invoke();
+    HMS_HANDLER_THREAD_LOCAL_CONF.remove();
+    HMS_HANDLER_THREAD_LOCAL_TXN.remove();
+    Object connPool = CONN_POOL.get();

Review comment:
       `TxnHandler::setupJdbcConnectionPool` doesn't do anything if `connPool` 
is already set:
   
https://github.com/apache/hive/blob/release-1.2.1/metastore/src/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java#L1862
   
   Besides, I also want to close it in case there's any resource leak.




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