From acace469b11fec91c28676c63e7058f13940e546 Mon Sep 17 00:00:00 2001
From: Raghav Aggarwal <raghavaggarwal03.ra@gmail.com>
Date: Wed, 17 Jun 2026 12:41:12 +0530
Subject: [PATCH] HIVE-29670: Avoid overwriting read-only
 DB_NOTIFICATION_EVENT_ID_KEY_NAME in DbNotificationListener when processing
 batched partition events

---
 .../listener/DbNotificationListener.java      | 21 +++--
 .../resources/testconfiguration.properties    |  1 +
 .../db_notification_batch_insert.q            | 25 ++++++
 .../llap/db_notification_batch_insert.q.out   | 79 +++++++++++++++++++
 4 files changed, 118 insertions(+), 8 deletions(-)
 create mode 100644 ql/src/test/queries/clientpositive/db_notification_batch_insert.q
 create mode 100644 ql/src/test/results/clientpositive/llap/db_notification_batch_insert.q.out

diff --git a/hcatalog/server-extensions/src/main/java/org/apache/hive/hcatalog/listener/DbNotificationListener.java b/hcatalog/server-extensions/src/main/java/org/apache/hive/hcatalog/listener/DbNotificationListener.java
index fed4a71a01fa..34825412fdb6 100644
--- a/hcatalog/server-extensions/src/main/java/org/apache/hive/hcatalog/listener/DbNotificationListener.java
+++ b/hcatalog/server-extensions/src/main/java/org/apache/hive/hcatalog/listener/DbNotificationListener.java
@@ -1410,10 +1410,13 @@ private void addNotificationLogBatch(List<NotificationEvent> eventList, List<Lis
 
         event.setEventId(nextEventId);
         // Set the DB_NOTIFICATION_EVENT_ID for future reference by other listeners.
-        if (event.isSetEventId()) {
+        if (event.isSetEventId()
+            && !listenerEvent
+                .getParameters()
+                .containsKey(MetaStoreEventListenerConstants.DB_NOTIFICATION_EVENT_ID_KEY_NAME)) {
           listenerEvent.putParameter(
-                  MetaStoreEventListenerConstants.DB_NOTIFICATION_EVENT_ID_KEY_NAME,
-                  Long.toString(event.getEventId()));
+              MetaStoreEventListenerConstants.DB_NOTIFICATION_EVENT_ID_KEY_NAME,
+              Long.toString(event.getEventId()));
         }
         nextNLId++;
         nextEventId++;
@@ -1431,17 +1434,19 @@ private void addNotificationLogBatch(List<NotificationEvent> eventList, List<Lis
    * Process this notification by adding it to metastore DB.
    *
    * @param event NotificationEvent is the object written to the metastore DB.
-   * @param listenerEvent ListenerEvent (from which NotificationEvent was based) used only to set the
-   *                      DB_NOTIFICATION_EVENT_ID_KEY_NAME for future reference by other listeners.
+   * @param listenerEvent ListenerEvent (from which NotificationEvent was based) used only to set
+   *     the DB_NOTIFICATION_EVENT_ID_KEY_NAME for future reference by other listeners.
    */
   private void process(NotificationEvent event, ListenerEvent listenerEvent) throws MetaException {
     event.setMessageFormat(msgEncoder.getMessageFormat());
-    LOG.debug("DbNotificationListener: Processing : {}:{}", event.getEventId(),
-        event.getMessage());
+    LOG.debug("DbNotificationListener: Processing : {}:{}", event.getEventId(), event.getMessage());
     HMSHandler.getMSForConf(conf).addNotificationEvent(event);
 
     // Set the DB_NOTIFICATION_EVENT_ID for future reference by other listeners.
-    if (event.isSetEventId()) {
+    if (event.isSetEventId()
+        && !listenerEvent
+            .getParameters()
+            .containsKey(MetaStoreEventListenerConstants.DB_NOTIFICATION_EVENT_ID_KEY_NAME)) {
       listenerEvent.putParameter(
           MetaStoreEventListenerConstants.DB_NOTIFICATION_EVENT_ID_KEY_NAME,
           Long.toString(event.getEventId()));
diff --git a/itests/src/test/resources/testconfiguration.properties b/itests/src/test/resources/testconfiguration.properties
index 214afa40d6aa..b4441518a64a 100644
--- a/itests/src/test/resources/testconfiguration.properties
+++ b/itests/src/test/resources/testconfiguration.properties
@@ -75,6 +75,7 @@ minillap.query.files=\
   cte_4.q,\
   cttl.q,\
   custom_udf_vectorization.q,\
+  db_notification_batch_insert.q,\
   dynamic_partition_pruning_2.q,\
   dynamic_semijoin_user_level.q,\
   dynpart_cast.q,\
diff --git a/ql/src/test/queries/clientpositive/db_notification_batch_insert.q b/ql/src/test/queries/clientpositive/db_notification_batch_insert.q
new file mode 100644
index 000000000000..ad537615d1e2
--- /dev/null
+++ b/ql/src/test/queries/clientpositive/db_notification_batch_insert.q
@@ -0,0 +1,25 @@
+set hive.metastore.transactional.event.listeners=org.apache.hive.hcatalog.listener.DbNotificationListener;
+set metastore.jdbc.max.batch.size=10;
+
+set hive.stats.autogather=true;
+set hive.exec.dynamic.partition=true;
+set hive.exec.dynamic.partition.mode=nonstrict;
+set hive.stats.reliable=true;
+
+DROP TABLE IF EXISTS repro_batch_test;
+
+CREATE TABLE repro_batch_test (
+    id INT,
+    name STRING
+)
+PARTITIONED BY (part_key INT);
+
+INSERT INTO TABLE repro_batch_test PARTITION (part_key)
+SELECT
+    val as id,
+    'dummy_data' as name,
+    val as part_key
+FROM (
+    SELECT (a.pos + 1) as val
+    FROM (SELECT posexplode(split(repeat(',', 10), ','))) a
+) dummy;
diff --git a/ql/src/test/results/clientpositive/llap/db_notification_batch_insert.q.out b/ql/src/test/results/clientpositive/llap/db_notification_batch_insert.q.out
new file mode 100644
index 000000000000..7ab6820cf149
--- /dev/null
+++ b/ql/src/test/results/clientpositive/llap/db_notification_batch_insert.q.out
@@ -0,0 +1,79 @@
+PREHOOK: query: DROP TABLE IF EXISTS repro_batch_test
+PREHOOK: type: DROPTABLE
+PREHOOK: Output: database:default
+POSTHOOK: query: DROP TABLE IF EXISTS repro_batch_test
+POSTHOOK: type: DROPTABLE
+POSTHOOK: Output: database:default
+PREHOOK: query: CREATE TABLE repro_batch_test (
+    id INT,
+    name STRING
+)
+PARTITIONED BY (part_key INT)
+PREHOOK: type: CREATETABLE
+PREHOOK: Output: database:default
+PREHOOK: Output: default@repro_batch_test
+POSTHOOK: query: CREATE TABLE repro_batch_test (
+    id INT,
+    name STRING
+)
+PARTITIONED BY (part_key INT)
+POSTHOOK: type: CREATETABLE
+POSTHOOK: Output: database:default
+POSTHOOK: Output: default@repro_batch_test
+PREHOOK: query: INSERT INTO TABLE repro_batch_test PARTITION (part_key)
+SELECT
+    val as id,
+    'dummy_data' as name,
+    val as part_key
+FROM (
+    SELECT (a.pos + 1) as val
+    FROM (SELECT posexplode(split(repeat(',', 10), ','))) a
+) dummy
+PREHOOK: type: QUERY
+PREHOOK: Input: _dummy_database@_dummy_table
+PREHOOK: Output: default@repro_batch_test
+POSTHOOK: query: INSERT INTO TABLE repro_batch_test PARTITION (part_key)
+SELECT
+    val as id,
+    'dummy_data' as name,
+    val as part_key
+FROM (
+    SELECT (a.pos + 1) as val
+    FROM (SELECT posexplode(split(repeat(',', 10), ','))) a
+) dummy
+POSTHOOK: type: QUERY
+POSTHOOK: Input: _dummy_database@_dummy_table
+POSTHOOK: Output: default@repro_batch_test
+POSTHOOK: Output: default@repro_batch_test@part_key=1
+POSTHOOK: Output: default@repro_batch_test@part_key=10
+POSTHOOK: Output: default@repro_batch_test@part_key=11
+POSTHOOK: Output: default@repro_batch_test@part_key=2
+POSTHOOK: Output: default@repro_batch_test@part_key=3
+POSTHOOK: Output: default@repro_batch_test@part_key=4
+POSTHOOK: Output: default@repro_batch_test@part_key=5
+POSTHOOK: Output: default@repro_batch_test@part_key=6
+POSTHOOK: Output: default@repro_batch_test@part_key=7
+POSTHOOK: Output: default@repro_batch_test@part_key=8
+POSTHOOK: Output: default@repro_batch_test@part_key=9
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=10).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=10).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=11).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=11).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=1).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=1).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=2).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=2).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=3).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=3).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=4).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=4).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=5).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=5).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=6).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=6).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=7).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=7).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=8).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=8).name SIMPLE []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=9).id SCRIPT []
+POSTHOOK: Lineage: repro_batch_test PARTITION(part_key=9).name SIMPLE []