diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 5f4327b1cd..1b4643a958 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1289,7 +1289,9 @@ void smlDestroyInfo(SSmlHandle *info) {
     }
     taosMemoryFree(info->lines);
   }
-  taosMemoryFreeClear(info->preLine.tags);
+  if(info->protocol == TSDB_SML_JSON_PROTOCOL)  {
+    taosMemoryFreeClear(info->preLine.tags);
+  }
   cJSON_Delete(info->root);
   taosMemoryFreeClear(info);
 }
@@ -1546,7 +1548,9 @@ int32_t smlClearForRerun(SSmlHandle *info) {
   }
 
   taosArrayClearP(info->escapedStringList, taosMemoryFree);
-  taosMemoryFreeClear(info->preLine.tags);
+  if(info->protocol == TSDB_SML_JSON_PROTOCOL)  {
+    taosMemoryFreeClear(info->preLine.tags);
+  }
   (void)memset(&info->preLine, 0, sizeof(SSmlLineInfo));
   info->currSTableMeta = NULL;
   info->currTableDataCtx = NULL;
diff --git a/utils/test/c/sml_test.c b/utils/test/c/sml_test.c
index 20f2d7dc25..6d4192280c 100644
--- a/utils/test/c/sml_test.c
+++ b/utils/test/c/sml_test.c
@@ -105,6 +105,44 @@ int smlProcess_telnet_Test() {
   return code;
 }
 
+int smlProcess_telnet0_Test() {
+  TAOS *taos = taos_connect("localhost", "root", "taosdata", NULL, 0);
+
+  TAOS_RES *pRes = taos_query(taos, "create database if not exists sml_db schemaless 1");
+  taos_free_result(pRes);
+
+  pRes = taos_query(taos, "use sml_db");
+  taos_free_result(pRes);
+
+  const char *sql1[] = {"sysif.bytes.out  1479496100 1.3E0 host=web01 interface=eth0"};
+  pRes = taos_schemaless_insert(taos, (char **)sql1, sizeof(sql1) / sizeof(sql1[0]), TSDB_SML_TELNET_PROTOCOL,
+                                TSDB_SML_TIMESTAMP_NANO_SECONDS);
+  printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
+  int code = taos_errno(pRes);
+  ASSERT(code == 0);
+  taos_free_result(pRes);
+
+  const char *sql2[] = {"sysif.bytes.out  1479496700 1.6E0 host=web01 interface=eth0"};
+  pRes = taos_schemaless_insert(taos, (char **)sql2, sizeof(sql2) / sizeof(sql2[0]), TSDB_SML_TELNET_PROTOCOL,
+                                TSDB_SML_TIMESTAMP_NANO_SECONDS);
+  printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
+  code = taos_errno(pRes);
+  ASSERT(code == 0);
+  taos_free_result(pRes);
+
+  const char *sql3[] = {"sysif.bytes.out  1479496300 1.1E0 interface=eth0 host=web01"};
+  pRes = taos_schemaless_insert(taos, (char **)sql3, sizeof(sql3) / sizeof(sql3[0]), TSDB_SML_TELNET_PROTOCOL,
+                                TSDB_SML_TIMESTAMP_NANO_SECONDS);
+  printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
+  code = taos_errno(pRes);
+  ASSERT(code == 0);
+  taos_free_result(pRes);
+
+  taos_close(taos);
+
+  return code;
+}
+
 int smlProcess_json0_Test() {
   TAOS *taos = taos_connect("localhost", "root", "taosdata", NULL, 0);
 
@@ -115,7 +153,7 @@ int smlProcess_json0_Test() {
   taos_free_result(pRes);
 
   const char *sql[] = {
-      "[{\"metric\":\"sys.cpu.nice\",\"timestamp\":1662344045,\"value\":9,\"tags\":{\"host\":\"web02\",\"dc\":4}}]"};
+      "[{\"metric\":\"syscpu.nice\",\"timestamp\":1662344045,\"value\":9,\"tags\":{\"host\":\"web02\",\"dc\":4}}]"};
 
   char *sql1[1] = {0};
   for (int i = 0; i < 1; i++) {
@@ -141,8 +179,8 @@ int smlProcess_json0_Test() {
 
 
   const char *sql2[] = {
-      "[{\"metric\":\"sys.cpu.nice\",\"timestamp\":1662344041,\"value\":13,\"tags\":{\"host\":\"web01\",\"dc\":1}"
-      "},{\"metric\":\"sys.cpu.nice\",\"timestamp\":1662344042,\"value\":9,\"tags\":{\"host\":\"web02\",\"dc\":4}"
+      "[{\"metric\":\"syscpu.nice\",\"timestamp\":1662344041,\"value\":13,\"tags\":{\"host\":\"web01\",\"dc\":1}"
+      "},{\"metric\":\"syscpu.nice\",\"timestamp\":1662344042,\"value\":9,\"tags\":{\"host\":\"web02\",\"dc\":4}"
       "}]",
   };
 
@@ -169,33 +207,6 @@ int smlProcess_json0_Test() {
 
   ASSERT(code == 0);
 
-
-  // TD-22903
-  const char *sql4[] = {
-      "[{\"metric\": \"test_us\", \"timestamp\": {\"value\": 1626006833639, \"type\": \"ms\"}, \"value\": true, \"tags\": {\"t0\": true}}, {\"metric\": \"test_us\", \"timestamp\": {\"value\": 1626006833638, \"type\": \"ms\"}, \"value\": false, \"tags\": {\"t0\": true}}]"
-  };
-  char *sql5[1] = {0};
-  for (int i = 0; i < 1; i++) {
-    sql5[i] = taosMemoryCalloc(1, 1024);
-    ASSERT(sql5[i] != NULL);
-    (void)strncpy(sql5[i], sql4[i], 1023);
-  }
-
-  pRes = taos_schemaless_insert(taos, (char **)sql5, sizeof(sql5) / sizeof(sql5[0]), TSDB_SML_JSON_PROTOCOL,
-                                TSDB_SML_TIMESTAMP_NANO_SECONDS);
-  code = taos_errno(pRes);
-  if (code != 0) {
-    printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
-  } else {
-    printf("%s result:success\n", __FUNCTION__);
-  }
-  taos_free_result(pRes);
-
-  for (int i = 0; i < 1; i++) {
-    taosMemoryFree(sql5[i]);
-  }
-  ASSERT(code == 0);
-
   taos_close(taos);
 
   return code;
@@ -2231,8 +2242,9 @@ int main(int argc, char *argv[]) {
     taos_options(TSDB_OPTION_CONFIGDIR, argv[1]);
   }
 
-//  int ret = smlProcess_json0_Test();
-  int ret = sml_ts5528_test();
+  int ret = smlProcess_json0_Test();
+  ASSERT(!ret);
+  ret = sml_ts5528_test();
   ASSERT(!ret);
   ret = sml_td29691_Test();
   ASSERT(ret);
@@ -2252,8 +2264,8 @@ int main(int argc, char *argv[]) {
   ASSERT(!ret);
   ret = sml_ts3116_Test();
   ASSERT(!ret);
-  ret = sml_ts2385_Test();    // this test case need config sml table name using ./sml_test config_file
-  ASSERT(!ret);
+//  ret = sml_ts2385_Test();    // this test case need config sml table name using ./sml_test config_file
+//  ASSERT(!ret);
   ret = sml_ts3303_Test();
   ASSERT(!ret);
   ret = sml_ttl_Test();
@@ -2268,6 +2280,8 @@ int main(int argc, char *argv[]) {
   ASSERT(!ret);
   ret = smlProcess_telnet_Test();
   ASSERT(!ret);
+  ret = smlProcess_telnet0_Test();
+  ASSERT(!ret);
   ret = smlProcess_json1_Test();
   ASSERT(!ret);
   ret = smlProcess_json2_Test();