diff --git a/scanner/adapter_hs.cpp b/scanner/adapter_hs.cpp
index 2ca6163..8c37dd8 100644
--- a/scanner/adapter_hs.cpp
+++ b/scanner/adapter_hs.cpp
@@ -583,6 +583,10 @@ next:
 
 struct adapter_hs_stream *adapter_hs_stream_open(struct adapter_hs *hs_instance, int thread_id)
 {
+    if (NULL == hs_instance || thread_id < 0) {
+        return NULL;
+    }
+    
     struct adapter_hs_stream *hs_stream = ALLOC(struct adapter_hs_stream, 1);
     hs_error_t err;
 
@@ -617,6 +621,11 @@ int adapter_hs_scan_stream(struct adapter_hs_stream *hs_stream, const char *data
 {
     hs_error_t err;
 
+    if (NULL == hs_stream || NULL == data || 0 == data_len ||
+        NULL == results || 0 == n_result || NULL == n_hit_result) {
+        return -1;
+    }
+    
     int thread_id = hs_stream->thread_id;
     if (hs_stream->literal_stream != NULL) {
         err = hs_scan_stream(hs_stream->literal_stream, data, data_len, 
diff --git a/src/inc_internal/maat_expr.h b/src/inc_internal/maat_expr.h
index 55dad86..56342ee 100644
--- a/src/inc_internal/maat_expr.h
+++ b/src/inc_internal/maat_expr.h
@@ -43,9 +43,9 @@ int expr_runtime_commit(void *expr_runtime, const char *table_name);
  * @retval the num of hit group_id
 */
 int expr_runtime_scan(struct expr_runtime *expr_rt, int thread_id, const char *data, 
-                      size_t data_len, int vtable_ids, struct maat_state *state);
+                      size_t data_len, int vtable_id, struct maat_state *state);
 
-void expr_runtime_stream_open(struct expr_runtime *expr_rt, int thread_id);
+int expr_runtime_stream_open(struct expr_runtime *expr_rt, int thread_id);
 int expr_runtime_stream_scan(struct expr_runtime *expr_rt, const char *data, size_t data_len,
                              int vtable_id, struct maat_state *state);
 void expr_runtime_stream_close(struct expr_runtime *expr_rt);
diff --git a/src/maat_api.c b/src/maat_api.c
index 21b9f86..85eef5a 100644
--- a/src/maat_api.c
+++ b/src/maat_api.c
@@ -1531,11 +1531,12 @@ struct maat_stream *maat_scan_stream_open(struct maat *maat_instance, int table_
 
         void *expr_rt = table_manager_get_runtime(stream->ref_maat_instance->tbl_mgr, 
                                                   stream->physical_table_ids[i]);
-        if (NULL == expr_rt) {
+        assert(expr_rt != NULL);
+
+        int ret = expr_runtime_stream_open((struct expr_runtime *)expr_rt, thread_id);
+        if (ret < 0) {
             return NULL;
         }
-
-        expr_runtime_stream_open((struct expr_runtime *)expr_rt, thread_id);
     }
 
     return stream;
diff --git a/src/maat_ex_data.c b/src/maat_ex_data.c
index de2ff61..dd28416 100644
--- a/src/maat_ex_data.c
+++ b/src/maat_ex_data.c
@@ -222,11 +222,7 @@ int ex_data_runtime_add_ex_container(struct ex_data_runtime *ex_data_rt,
     }
 
     rcu_hash_add(ex_data_rt->htable, key, key_len, ex_container);
-    tmp_container = (struct ex_data_container *)rcu_hash_find(ex_data_rt->htable, 
-                                                              key, key_len);
-    log_info(ex_data_rt->logger, MODULE_EX_DATA,
-            "ex_data_runtime_add_ex_container rcu_hash_add ex_data_rt->htable:%p key:%p key_len:%zu, ex_container:%p tmp_container:%p", 
-            ex_data_rt->htable, key, key_len, ex_container, tmp_container);
+    
     return 0;
 }
 
diff --git a/src/maat_expr.c b/src/maat_expr.c
index 2a97b5c..4a20a32 100644
--- a/src/maat_expr.c
+++ b/src/maat_expr.c
@@ -847,8 +847,13 @@ int expr_runtime_commit(void *expr_runtime, const char *table_name)
 }
 
 int expr_runtime_scan(struct expr_runtime *expr_rt, int thread_id, const char *data, 
-                      size_t data_len, int vtable_ids, struct maat_state *state)
+                      size_t data_len, int vtable_id, struct maat_state *state)
 {
+    if (NULL == expr_rt || thread_id < 0 || NULL == data || 0 == data_len 
+        || vtable_id < 0 || NULL == state) {
+        return -1;
+    }
+
     size_t n_hit_item = 0;
     struct hs_scan_result hit_results[MAX_SCANNER_HIT_ITEM_NUM] = {0};
     
@@ -885,7 +890,7 @@ int expr_runtime_scan(struct expr_runtime *expr_rt, int thread_id, const char *d
     }
 
     size_t group_hit_cnt = 0;
-    ret = maat_compile_state_update(expr_rt->item_hash, vtable_ids, hit_item_ids, 
+    ret = maat_compile_state_update(expr_rt->item_hash, vtable_id, hit_item_ids, 
                                     real_hit_item_cnt, &group_hit_cnt, state);
     if (ret < 0) {
         return -1;
@@ -894,20 +899,27 @@ int expr_runtime_scan(struct expr_runtime *expr_rt, int thread_id, const char *d
     return group_hit_cnt;
 }
 
-void expr_runtime_stream_open(struct expr_runtime *expr_rt, int thread_id)
+int expr_runtime_stream_open(struct expr_runtime *expr_rt, int thread_id)
 {
-    if (NULL == expr_rt) {
-        return;
+    if (NULL == expr_rt || thread_id < 0) {
+        return -1;
     }
 
     struct adapter_hs_stream *hs_stream = adapter_hs_stream_open(expr_rt->hs, thread_id);
+    if (NULL == hs_stream) {
+        return -1;
+    }
+
     expr_rt->hs_stream = hs_stream;
+
+    return 0;
 }
 
 int expr_runtime_stream_scan(struct expr_runtime *expr_rt, const char *data, size_t data_len,
                              int vtable_id, struct maat_state *state)
 {
-    if (NULL == expr_rt) {
+    if (NULL == expr_rt || NULL == data || 0 == data_len ||
+        vtable_id < 0 || NULL == state) {
         return -1;
     }
 
diff --git a/test/maat_framework_gtest.cpp b/test/maat_framework_gtest.cpp
index 3f0008f..2adcbb5 100644
--- a/test/maat_framework_gtest.cpp
+++ b/test/maat_framework_gtest.cpp
@@ -261,7 +261,33 @@ TEST_F(MaatStringScan, ExprAndExprPlus) {
     EXPECT_EQ(results[0], 195);
     maat_state_free(&state);
 }
+#if 0
+TEST_F(MaatStringScan, StreamInput) {
+    long long results[ARRAY_SIZE] = {0};
+    size_t n_hit_result = 0;
+    struct maat_state *state = NULL;
+	const char *scan_data = "http://www.cyberessays.com/search_results.php?action=search&query=yulingjing,abckkk,1234567";
+	const char *table_name = "HTTP_URL_STREAM";
 
+	int table_id = maat_table_get_id(g_maat_instance, table_name);
+	ASSERT_GT(table_id, 0);
+
+	struct maat_stream *sp = maat_scan_stream_open(g_maat_instance, table_id, 0);
+	ASSERT_FALSE(sp==NULL);
+
+	int ret = maat_scan_stream(&sp, "www.cyberessays.com", strlen("www.cyberessays.com"),
+                                results, ARRAY_SIZE, &n_hit_result, &state);
+	EXPECT_EQ(ret, MAAT_SCAN_OK);
+
+	ret = maat_scan_stream(&sp, scan_data, strlen(scan_data), results, ARRAY_SIZE,
+                            &n_hit_result, &state);
+	maat_scan_stream_close(&sp);
+
+	EXPECT_EQ(ret, MAAT_SCAN_HIT);
+	EXPECT_EQ(results[0], 125);
+	maat_state_free(&state);
+}
+#endif
 //TODO:
 #if 0
 TEST_F(MaatStringScan, ShouldNotHitExprPlus) {
@@ -1565,7 +1591,7 @@ int main(int argc, char ** argv)
         return -1;
     }
 
-    const char *accept_tags = "{\"tags\":[{\"tag\":\"location\",\"value\":\"北京/朝阳/华严北里/甲22号\"},{\"tag\":\"isp\",\"value\":\"移动\"},{\"tag\":\"location\",\"value\":\"Astana\"}]}";
+   const char* accept_tags="{\"tags\":[{\"tag\":\"location\",\"value\":\"北京/朝阳/华严北里/甲22号\"},{\"tag\":\"isp\",\"value\":\"移动\"},{\"tag\":\"location\",\"value\":\"Astana\"}]}";
     char redis_ip[64] = "127.0.0.1";
     int redis_port = 6379;
     int redis_db = 0;
diff --git a/test/maat_json.json b/test/maat_json.json
index 56c958f..bae416f 100644
--- a/test/maat_json.json
+++ b/test/maat_json.json
@@ -271,7 +271,6 @@
                 }
             ]
         },
-       
         {
             "compile_id": 126,
             "service": 1,