From 83c82f8e5b2b3bcbf1ed0288155fb0e4b10d3ffc Mon Sep 17 00:00:00 2001
From: bwcx_jzy <bwcx_jzy@163.com>
Date: Thu, 7 Sep 2023 09:14:36 +0800
Subject: [PATCH] fix Tailer stop NPE

---
 hutool-core/src/main/java/cn/hutool/core/io/file/Tailer.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/io/file/Tailer.java b/hutool-core/src/main/java/cn/hutool/core/io/file/Tailer.java
index 5e7164bfe..448122754 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/file/Tailer.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/file/Tailer.java
@@ -174,7 +174,9 @@ public class Tailer implements Serializable {
 			this.executorService.shutdown();
 		}finally {
 			IoUtil.close(this.randomAccessFile);
-			fileDeleteWatchMonitor.close();
+			if (fileDeleteWatchMonitor != null) {
+				fileDeleteWatchMonitor.close();
+			}
 		}
 	}