diff --git a/Fix-log-in-debug-mode.patch b/Fix-log-in-debug-mode.patch
new file mode 100644
index 0000000000000000000000000000000000000000..d9ae4f2246089a3eb41f100012bb65e1033d7bba
--- /dev/null
+++ b/Fix-log-in-debug-mode.patch
@@ -0,0 +1,26 @@
+From a1bc9ba4cf0659c9053a4e52befa95e979801e41 Mon Sep 17 00:00:00 2001
+From: caodongxia <315816521@qq.com>
+Date: Sat, 13 Nov 2021 14:56:32 +0800
+Subject: [PATCH] fix log in debug mode
+
+
+diff --git a/src/traffic_crashlog/traffic_crashlog.cc b/src/traffic_crashlog/traffic_crashlog.cc
+index 936ccef..124c078 100644
+--- a/src/traffic_crashlog/traffic_crashlog.cc
++++ b/src/traffic_crashlog/traffic_crashlog.cc
+@@ -260,8 +260,10 @@ main(int /* argc ATS_UNUSED */, const char **argv)
+ 
+   fprintf(fp, "\n");
+   crashlog_write_records(fp, target);
+-
+-  Error("wrote crash log to %s", logname);
++  
++  if (!debug_mode) {
++    Note("wrote crash log to %s", logname);
++  }
+ 
+   ats_free(logname);
+ 
+-- 
+2.27.0
+
diff --git a/trafficserver.spec b/trafficserver.spec
index 1a36b760d5eb15aae7c6ac2a69b99c7c8444d74b..6c3ca826b0a9b453746dbbcb1900e40a2fd0296d 100644
--- a/trafficserver.spec
+++ b/trafficserver.spec
@@ -2,7 +2,7 @@
 %{!?release: %define release 2}
 Name:                trafficserver
 Version:             9.1.0
-Release:             3
+Release:             4
 Summary:             Apache Traffic Server, a reverse, forward and transparent HTTP proxy cache
 License:             Apache-2.0
 URL:                 https://trafficserver.apache.org/
@@ -13,6 +13,7 @@ Patch0002:           CVE-2021-37149.patch
 Patch0003:           CVE-2021-41585.patch
 Patch0004:           CVE-2021-43082.patch
 Patch0005:           Fix-status-failure-after-stopping-service.patch
+Patch0006:           Fix-log-in-debug-mode.patch    
 BuildRequires:       expat-devel hwloc-devel openssl-devel pcre-devel zlib-devel xz-devel
 BuildRequires:       libcurl-devel ncurses-devel gcc gcc-c++ perl-ExtUtils-MakeMaker
 BuildRequires:       libcap-devel cmake libunwind-devel automake
@@ -116,6 +117,9 @@ getent passwd ats >/dev/null || useradd -r -u 176 -g ats -d / -s /sbin/nologin -
 %{_datadir}/pkgconfig/trafficserver.pc
 
 %changelog
+* Sat Nov 13 2021 caodongxia <caodongxia@huawei.com> - 9.1.0-4
+- fix log in debug mode
+
 * Fri Nov 12 2021 lingsheng <lingsheng@huawei.com> - 9.1.0-3
 - fix stop service fail and remove SysVinit script