From e5a4005c2d13f13e9a8a4bece99b42dcc4721d03 Mon Sep 17 00:00:00 2001
From: Zijian <Shaddoll@users.noreply.github.com>
Date: Tue, 17 Dec 2024 10:47:10 -0800
Subject: [PATCH] Fix nil pointer issue

---
 .../uber/cadence/internal/common/WorkflowExecutionUtils.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/uber/cadence/internal/common/WorkflowExecutionUtils.java b/src/main/java/com/uber/cadence/internal/common/WorkflowExecutionUtils.java
index 067c3e0b..5d9add40 100644
--- a/src/main/java/com/uber/cadence/internal/common/WorkflowExecutionUtils.java
+++ b/src/main/java/com/uber/cadence/internal/common/WorkflowExecutionUtils.java
@@ -226,7 +226,8 @@ private static HistoryEvent getInstanceCloseEvent(
 
       pageToken = response.getNextPageToken();
       History history = response.getHistory();
-      if (history != null && history.getEvents().size() > 0) {
+
+      if (history != null && history.getEvents() != null && history.getEvents().size() > 0) {
         event = history.getEvents().get(0);
         if (!isWorkflowExecutionCompletedEvent(event)) {
           throw new RuntimeException("Last history event is not completion event: " + event);