diff --git a/src/gausskernel/storage/access/transam/double_write.cpp b/src/gausskernel/storage/access/transam/double_write.cpp
index 9a55ef81..c18c0234 100644
--- a/src/gausskernel/storage/access/transam/double_write.cpp
+++ b/src/gausskernel/storage/access/transam/double_write.cpp
@@ -1803,9 +1803,19 @@ bool dw_single_file_recycle(bool trunc_file)
 
 bool dw_verify_item(const dw_single_flush_item* item, uint16 dwn)
 {
-    if (item->data_page_idx == 0 || item->dwn != dwn) {
+    if (item->dwn != dwn) {
         return false;
     }
+
+    if (item->buf_tag.forkNum == InvalidForkNumber || item->buf_tag.blockNum == InvalidBlockNumber || 
+        item->buf_tag.rnode.relNode == InvalidOid) {
+        ereport(DEBUG1, 
+            (errmsg("dw recovery, find invalid item [page_idx %hu dwn %hu] skip this item,"
+            "buf_tag[rel %u/%u/%u blk %u fork %d]", item->data_page_idx, item->dwn, 
+            item->buf_tag.rnode.spcNode, item->buf_tag.rnode.dbNode, item->buf_tag.rnode.relNode, 
+            item->buf_tag.blockNum, item->buf_tag.forkNum)));
+        return false;    
+    }
     pg_crc32c crc;
     /* Contents are protected with a CRC */
     INIT_CRC32C(crc);
diff --git a/src/gausskernel/storage/replication/walsender.cpp b/src/gausskernel/storage/replication/walsender.cpp
index 76662c33..e0f23629 100644
--- a/src/gausskernel/storage/replication/walsender.cpp
+++ b/src/gausskernel/storage/replication/walsender.cpp
@@ -1795,7 +1795,7 @@ bool cmdStringCheck(const char *cmd_string)
  *   */
 static bool cmdStringLengthCheck(const char* cmd_string)
 {
-    const size_t cmd_length_limit = 1024;
+    const size_t cmd_length_limit = 102400;
     const size_t slotname_limit = 64;
     char comd[cmd_length_limit] = {'\0'};
     char* sub_cmd = NULL;