From b46594da07aa0d93e9d0131777df263185c5bddf Mon Sep 17 00:00:00 2001
From: TotaJ <totaj@qq.com>
Date: Thu, 29 Apr 2021 16:17:31 +0800
Subject: [PATCH] Fix free dirty_page_queue

---
 src/gausskernel/storage/access/transam/xlog.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/gausskernel/storage/access/transam/xlog.cpp b/src/gausskernel/storage/access/transam/xlog.cpp
index db9a6b0d4..7ae1cec49 100644
--- a/src/gausskernel/storage/access/transam/xlog.cpp
+++ b/src/gausskernel/storage/access/transam/xlog.cpp
@@ -10536,8 +10536,10 @@ void ShutdownXLOG(int code, Datum arg)
     /* Shutdown all the page writer threads. */
     ckpt_shutdown_bgwriter();
     ckpt_shutdown_pagewriter();
-    free(g_instance.ckpt_cxt_ctl->dirty_page_queue);
-    g_instance.ckpt_cxt_ctl->dirty_page_queue = NULL;
+    if (g_instance.ckpt_cxt_ctl->dirty_page_queue != NULL) {
+        pfree(g_instance.ckpt_cxt_ctl->dirty_page_queue);
+        g_instance.ckpt_cxt_ctl->dirty_page_queue = NULL;
+    }
     g_instance.ckpt_cxt_ctl->prune_queue_lock = NULL;
     g_instance.ckpt_cxt_ctl->ckpt_redo_state.recovery_queue_lock = NULL;