diff --git a/kata-containers.spec b/kata-containers.spec
index d031e891b5c3d295d17b9dc5ff7b7cc5b03dd297..962507840f13d6213a1a818c8c595b4f3c169691 100644
--- a/kata-containers.spec
+++ b/kata-containers.spec
@@ -2,7 +2,7 @@
 %global debug_package %{nil}
 
 %define VERSION 2.1.0
-%define RELEASE 11
+%define RELEASE 12
 
 Name:           kata-containers
 Version:        %{VERSION}
@@ -108,6 +108,12 @@ strip %{buildroot}/usr/bin/containerd-shim-kata-v2
 %doc
 
 %changelog
+* Thu Nov 25 2021 jikui <jikui2@huawei.com> - 2.1.0-12
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:truncate the log.json file before kata-runtime subcommand executed
+
 * Thu Nov 25 2021 jikui <jikui2@huawei.com> - 2.1.0-11
 - Type:bugfix
 - ID:NA
diff --git a/patches/0015-kata-containers-truncate-the-log.json-file-before-kata-.patch b/patches/0015-kata-containers-truncate-the-log.json-file-before-kata-.patch
new file mode 100644
index 0000000000000000000000000000000000000000..3edf5eddb6cf87417edd4fd74c8b3763193b95b5
--- /dev/null
+++ b/patches/0015-kata-containers-truncate-the-log.json-file-before-kata-.patch
@@ -0,0 +1,33 @@
+From fe490b4d63871f91c17ad72afef38a3227c8b4d3 Mon Sep 17 00:00:00 2001
+From: jikui <jikui2@huawei.com>
+Date: Fri, 5 Nov 2021 12:06:11 +0800
+Subject: [PATCH 6/8] kata-runtime: truncate the log.json file before
+ kata-runtime subcommand executed
+
+Signed-off-by: jikui <jikui2@huawei.com>
+---
+ src/runtime/cli/main.go | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/src/runtime/cli/main.go b/src/runtime/cli/main.go
+index 27757c0..7c77764 100644
+--- a/src/runtime/cli/main.go
++++ b/src/runtime/cli/main.go
+@@ -252,6 +252,14 @@ func beforeSubcommands(c *cli.Context) error {
+ 		ignoreConfigLogs = true
+ 	} else {
+ 		if path := c.GlobalString("log"); path != "" {
++			// since we have redirect the kata-runtime log to /var/log/messages, and avoid the
++			// path of log.json file to be large in the tmpfs, so we truncate the log.json file
++			// every time before subcommand is executed.
++			if path != "/dev/null" && katautils.FileExists(path) {
++				if err := os.Truncate(path, 0); err != nil {
++					return err
++				}
++			}
+ 			f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_APPEND|os.O_SYNC, 0640)
+ 			if err != nil {
+ 				return err
+-- 
+2.25.1
+
diff --git a/series.conf b/series.conf
index 19ebfe430a36418bc4665c761615c53cd8005547..37b33d84151327ec17a144d3656e4102c025cbbe 100644
--- a/series.conf
+++ b/series.conf
@@ -12,3 +12,4 @@
 0012-kata-containers-modify-kernel-and-image-path-in-conf.patch
 0013-kata-containers-increase-delete-cgroup-retry-times.patch
 0014-kata-containers-fix-umount-container-rootfs-dir-return-.patch
+0015-kata-containers-truncate-the-log.json-file-before-kata-.patch