From e39c4988ccfa99a7e6d01451eef899b770ea3cca Mon Sep 17 00:00:00 2001
From: hailin0 <wanghailin@apache.org>
Date: Wed, 1 Feb 2023 15:00:07 +0800
Subject: [PATCH] [Hotfix][Connector-V2] Fix connector source snapshot state
 NPE (#4027)

---
 release-note.md                                                | 2 ++
 .../seatunnel/clickhouse/source/ClickhouseSourceReader.java    | 3 ++-
 .../connectors/seatunnel/kudu/source/KuduSourceReader.java     | 3 ++-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/release-note.md b/release-note.md
index 616a0d0d63e..9e66dec4862 100644
--- a/release-note.md
+++ b/release-note.md
@@ -45,6 +45,8 @@
 ### Connectors
 - [ClickHouse File] Fix ClickhouseFile Committer Serializable Problems #3803
 - [ClickHouse] Fix clickhouse write cdc changelog update event #3951
+- [ClickHouse] Fix connector source snapshot state NPE #4027
+- [Kudu] Fix connector source snapshot state NPE #4027
 
 ### Zeta Engine
 - [Checkpoint] Fix Checkpoint Continue Trigger After Job CANCELED #3808
diff --git a/seatunnel-connectors-v2/connector-clickhouse/src/main/java/org/apache/seatunnel/connectors/seatunnel/clickhouse/source/ClickhouseSourceReader.java b/seatunnel-connectors-v2/connector-clickhouse/src/main/java/org/apache/seatunnel/connectors/seatunnel/clickhouse/source/ClickhouseSourceReader.java
index 72a4610610b..3860962bfce 100644
--- a/seatunnel-connectors-v2/connector-clickhouse/src/main/java/org/apache/seatunnel/connectors/seatunnel/clickhouse/source/ClickhouseSourceReader.java
+++ b/seatunnel-connectors-v2/connector-clickhouse/src/main/java/org/apache/seatunnel/connectors/seatunnel/clickhouse/source/ClickhouseSourceReader.java
@@ -31,6 +31,7 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Random;
 
@@ -88,7 +89,7 @@ public void pollNext(Collector<SeaTunnelRow> output) throws Exception {
 
     @Override
     public List<ClickhouseSourceSplit> snapshotState(long checkpointId) throws Exception {
-        return null;
+        return Collections.emptyList();
     }
 
     @Override
diff --git a/seatunnel-connectors-v2/connector-kudu/src/main/java/org/apache/seatunnel/connectors/seatunnel/kudu/source/KuduSourceReader.java b/seatunnel-connectors-v2/connector-kudu/src/main/java/org/apache/seatunnel/connectors/seatunnel/kudu/source/KuduSourceReader.java
index 05e621bada4..56253ca015d 100644
--- a/seatunnel-connectors-v2/connector-kudu/src/main/java/org/apache/seatunnel/connectors/seatunnel/kudu/source/KuduSourceReader.java
+++ b/seatunnel-connectors-v2/connector-kudu/src/main/java/org/apache/seatunnel/connectors/seatunnel/kudu/source/KuduSourceReader.java
@@ -29,6 +29,7 @@
 import org.apache.kudu.client.RowResult;
 import org.apache.kudu.client.RowResultIterator;
 
+import java.util.Collections;
 import java.util.Deque;
 import java.util.LinkedList;
 import java.util.List;
@@ -85,7 +86,7 @@ public void pollNext(Collector<SeaTunnelRow> output) throws Exception {
 
     @Override
     public List<KuduSourceSplit> snapshotState(long checkpointId) {
-        return null;
+        return Collections.emptyList();
     }
 
     @Override