diff --git a/scanner/ip_matcher/ip_matcher.cpp b/scanner/ip_matcher/ip_matcher.cpp
index 0e09bc5..9e59b2c 100644
--- a/scanner/ip_matcher/ip_matcher.cpp
+++ b/scanner/ip_matcher/ip_matcher.cpp
@@ -15,16 +15,6 @@ pid_t ip_matcher_gettid()
 	return syscall(SYS_gettid);
 }
 
-static const char *ip_matcher_module_name_str(const char *name)
-{
-	static __thread char module[64];
-	snprintf(module,sizeof(module),"%s(%d)", name, ip_matcher_gettid());
-    
-	return module;
-}
-
-#define MODULE_IP_MATCHER	 ip_matcher_module_name_str("maat.ip_matcher")
-
 int ipmatcher_VERSION_2020_05_13 = 0;
 
 struct ip_matcher
@@ -32,7 +22,6 @@ struct ip_matcher
 	CRuleMatch *	ipv4_matcher;
 	CRuleMatch *	ipv6_matcher;
 
-    struct log_handle *logger;
 #ifdef RULESCAN_DEBUG
 	//for test
 	double						search_time;
@@ -70,7 +59,6 @@ struct ip_matcher * ip_matcher_new(struct ip_rule * rules, size_t rule_num,
 	mem_bytes = sizeof(struct ip_matcher);
 	matcher->ipv4_matcher = NULL;
 	matcher->ipv6_matcher = NULL;
-    matcher->logger = logger;
 
 	map<long long, struct ip_rule> ipv4_rules;
 	map<long long, struct ip_rule> ipv6_rules;
@@ -141,7 +129,7 @@ int ip_matcher_match(struct ip_matcher* matcher, struct ip_data* data,
 
 	if(tmp_matcher==NULL) 
 	{
-		return -1;
+		return 0;
 	}
 
 	int ret = tmp_matcher->search_rule(data,result,size);
diff --git a/src/maat_api.c b/src/maat_api.c
index 1dcf9f0..181d989 100644
--- a/src/maat_api.c
+++ b/src/maat_api.c
@@ -1012,13 +1012,11 @@ int flag_scan(struct table_manager *tbl_mgr, int thread_id, long long flag,
 
     int group_hit_cnt = flag_runtime_scan((struct flag_runtime *)flag_rt, thread_id,
                                           flag, vtable_id, state);
-    if (group_hit_cnt < 0) {
-        return -1;
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
-    if (group_hit_cnt > 0) {
-        flag_runtime_scan_hit_inc((struct flag_runtime *)flag_rt, thread_id);
-    }
+    flag_runtime_scan_hit_inc((struct flag_runtime *)flag_rt, thread_id);
 
     return group_hit_cnt;
 }
@@ -1044,13 +1042,11 @@ int interval_scan(struct table_manager *tbl_mgr, int thread_id, long long intege
 
     int group_hit_cnt = interval_runtime_scan((struct interval_runtime *)interval_rt,
                                               thread_id, integer, vtable_id, state);
-    if (group_hit_cnt < 0) {
-        return -1;
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
-    if (group_hit_cnt > 0) {
-        interval_runtime_scan_hit_inc((struct interval_runtime *)interval_rt, thread_id);
-    }
+    interval_runtime_scan_hit_inc((struct interval_runtime *)interval_rt, thread_id);
 
     return group_hit_cnt;
 }
@@ -1073,14 +1069,12 @@ int ipv4_scan(struct table_manager *tbl_mgr, int thread_id, uint32_t ip_addr,
     int group_hit_cnt = ip_runtime_scan((struct ip_runtime *)ip_rt, thread_id, IPv4,
                                         (uint8_t *)&ip_addr, port, proto, vtable_id, 
                                         state);
-    if (group_hit_cnt < 0) {
-        return -1;
-    }
-
-    if (group_hit_cnt > 0) {
-        ip_runtime_scan_hit_inc((struct ip_runtime *)ip_rt, thread_id);
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
+    ip_runtime_scan_hit_inc((struct ip_runtime *)ip_rt, thread_id);
+    
     return group_hit_cnt;
 }
 
@@ -1101,14 +1095,12 @@ int ipv6_scan(struct table_manager *tbl_mgr, int thread_id, uint8_t *ip_addr,
 
     int group_hit_cnt = ip_runtime_scan((struct ip_runtime *)ip_rt, thread_id, IPv6,
                                         ip_addr, port, proto, vtable_id, state);
-    if (group_hit_cnt < 0) {
-        return -1;
-    }
-
-    if (group_hit_cnt > 0) {
-        ip_runtime_scan_hit_inc((struct ip_runtime *)ip_rt, thread_id);
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
+    ip_runtime_scan_hit_inc((struct ip_runtime *)ip_rt, thread_id);
+    
     return group_hit_cnt;
 }
 
@@ -1133,13 +1125,11 @@ int string_scan(struct table_manager *tbl_mgr, int thread_id, const char *data,
     int group_hit_cnt = expr_runtime_scan((struct expr_runtime *)expr_rt,
                                           thread_id, data, data_len,
                                           vtable_id, state);
-    if (group_hit_cnt < 0) {
-        return -1;
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
-    if (group_hit_cnt > 0) {
-        expr_runtime_scan_hit_inc((struct expr_runtime *)expr_rt, thread_id);
-    }
+    expr_runtime_scan_hit_inc((struct expr_runtime *)expr_rt, thread_id);
 
     return group_hit_cnt;
 }
@@ -1153,7 +1143,8 @@ int expr_stream_scan(struct maat_stream *stream, const char *data, size_t data_l
 
     struct table_manager *tbl_mgr = stream->ref_maat_instance->tbl_mgr;
     enum table_type table_type = table_manager_get_table_type(tbl_mgr, stream->physical_table_id);
-    if (table_type == TABLE_TYPE_EXPR_PLUS && DISTRICT_FLAG_UNSET == state->is_set_district) {
+    if (table_type == TABLE_TYPE_EXPR_PLUS && 
+        DISTRICT_FLAG_UNSET == state->is_set_district) {
         // maat_instance->scan_err_cnt++;
         return -1;
     }
@@ -1169,13 +1160,11 @@ int expr_stream_scan(struct maat_stream *stream, const char *data, size_t data_l
 
     int group_hit_cnt = expr_runtime_stream_scan((struct expr_runtime *)expr_rt, stream->s_handle,
                                                  data, data_len, stream->vtable_id, state);
-    if (group_hit_cnt < 0) {
-        return -1;
+    if (group_hit_cnt <= 0) {
+        return group_hit_cnt;
     }
 
-    if (group_hit_cnt > 0) {
-        expr_runtime_scan_hit_inc((struct expr_runtime *)expr_rt, stream->thread_id);
-    }
+    expr_runtime_scan_hit_inc((struct expr_runtime *)expr_rt, stream->thread_id);
 
     return group_hit_cnt;
 }
diff --git a/src/maat_compile.c b/src/maat_compile.c
index 8d37af7..b797e25 100644
--- a/src/maat_compile.c
+++ b/src/maat_compile.c
@@ -1831,15 +1831,9 @@ int maat_compile_state_update(struct rcu_hash_table *item_htable, int vtable_id,
 {
     struct maat_item *item = NULL;
     long long hit_group_ids[MAX_SCANNER_HIT_GROUP_NUM];
-    memset(hit_group_ids, 0, sizeof(hit_group_ids));
+    memset(hit_group_ids, -1, sizeof(hit_group_ids));
     size_t hit_group_cnt = 0;
 
-    void *g2g_rt = table_manager_get_runtime(state->maat_instance->tbl_mgr,
-                                             state->maat_instance->g2g_table_id);
-    if (NULL == g2g_rt) {
-        return -1;
-    }
-
     for (size_t i = 0; i < hit_item_cnt; i++) {
         item = (struct maat_item *)rcu_hash_find(item_htable, (char *)&(hit_item_ids[i]), sizeof(long long));
         //assert(item != NULL);
@@ -1876,6 +1870,12 @@ int maat_compile_state_update(struct rcu_hash_table *item_htable, int vtable_id,
         return 0;
     }
 
+    void *g2g_rt = table_manager_get_runtime(state->maat_instance->tbl_mgr,
+                                             state->maat_instance->g2g_table_id);
+    if (NULL == g2g_rt) {
+        return 0;
+    }
+
     long long top_group_ids[MAX_SCANNER_HIT_GROUP_NUM];
     memset(top_group_ids, -1, sizeof(top_group_ids));
     int top_group_cnt = group2group_runtime_get_top_groups(g2g_rt, hit_group_ids,
diff --git a/src/maat_expr.c b/src/maat_expr.c
index 9ad4826..f15b083 100644
--- a/src/maat_expr.c
+++ b/src/maat_expr.c
@@ -863,7 +863,7 @@ int expr_runtime_scan(struct expr_runtime *expr_rt, int thread_id, const char *d
     int real_hit_item_cnt = 0;
     long long district_id = state->district_id;
 
-    memset(hit_item_ids, 0, sizeof(hit_item_ids));
+    memset(hit_item_ids, -1, sizeof(hit_item_ids));
     
     for (size_t i = 0; i < n_hit_item; i++) {
         item = (struct maat_item_inner *)(hit_results[i].user_tag);
@@ -919,7 +919,7 @@ int expr_runtime_stream_scan(struct expr_runtime *expr_rt, struct adapter_hs_str
     }
     
     long long hit_item_ids[MAX_SCANNER_HIT_ITEM_NUM];
-    memset(hit_item_ids, 0, sizeof(hit_item_ids));
+    memset(hit_item_ids, -1, sizeof(hit_item_ids));
 
     for (size_t i = 0; i < n_hit_item; i++) {
         hit_item_ids[i] = hit_results[i].item_id;
diff --git a/src/maat_flag.c b/src/maat_flag.c
index 74efa76..5c73264 100644
--- a/src/maat_flag.c
+++ b/src/maat_flag.c
@@ -500,7 +500,7 @@ int flag_runtime_scan(struct flag_runtime *flag_rt, int thread_id,
     int real_hit_item_cnt = 0;
     long long district_id = state->district_id;
 
-    memset(hit_item_ids, 0, sizeof(hit_item_ids));
+    memset(hit_item_ids, -1, sizeof(hit_item_ids));
     
     for (int i = 0; i < n_hit_item; i++) {
         item = (struct maat_item_inner *)(hit_results[i].user_tag);
diff --git a/src/maat_interval.c b/src/maat_interval.c
index 624ee1c..fe28c62 100644
--- a/src/maat_interval.c
+++ b/src/maat_interval.c
@@ -496,7 +496,7 @@ int interval_runtime_scan(struct interval_runtime *interval_rt, int thread_id,
     int real_hit_item_cnt = 0;
     long long district_id = state->district_id;
 
-    memset(hit_item_ids, 0, sizeof(hit_item_ids));
+    memset(hit_item_ids, -1, sizeof(hit_item_ids));
 
     for (int i = 0; i < n_hit_item; i++) {
         item = (struct maat_item_inner *)(hit_results[i].user_tag);
diff --git a/src/maat_ip.c b/src/maat_ip.c
index 8672f0b..e6c1f2c 100644
--- a/src/maat_ip.c
+++ b/src/maat_ip.c
@@ -691,7 +691,7 @@ int ip_runtime_scan(struct ip_runtime *ip_rt, int thread_id, int ip_type,
     int ret = 0;
     size_t real_hit_index = 0;
     long long hit_item_ids[MAX_SCANNER_HIT_ITEM_NUM];
-    memset(hit_item_ids, 0, sizeof(hit_item_ids));
+    memset(hit_item_ids, -1, sizeof(hit_item_ids));
 
     // any ip, so scan port+proto
     if (1 == any_ip_flag) {