diff --git a/keepalived/check/check_snmp.c b/keepalived/check/check_snmp.c
index 67ae0e4f9..95c6e6f83 100644
--- a/keepalived/check/check_snmp.c
+++ b/keepalived/check/check_snmp.c
@@ -1451,6 +1451,9 @@ static struct variable8 check_vars[] = {
 void
 check_snmp_agent_init(const char *snmp_socket)
 {
+	if (snmp_running)
+		return;
+
 	/* We handle the global oid if we are running SNMP */
 	snmp_agent_init(snmp_socket, true);
 	snmp_register_mib(check_oid, OID_LENGTH(check_oid), "Healthchecker",
@@ -1462,6 +1465,9 @@ check_snmp_agent_init(const char *snmp_socket)
 void
 check_snmp_agent_close()
 {
+	if (!snmp_running)
+		return;
+
 	snmp_unregister_mib(check_oid, OID_LENGTH(check_oid));
 	snmp_agent_close(true);
 }
diff --git a/keepalived/core/snmp.c b/keepalived/core/snmp.c
index a9472feae..eb5bed20a 100644
--- a/keepalived/core/snmp.c
+++ b/keepalived/core/snmp.c
@@ -325,6 +325,9 @@ snmp_unregister_mib(oid *myoid, size_t len)
 void
 snmp_agent_init(const char *snmp_socket, bool base_mib)
 {
+	if (snmp_running)
+		return;
+
 	log_message(LOG_INFO, "Starting SNMP subagent");
 	netsnmp_enable_subagent();
 	snmp_disable_log();
@@ -378,6 +381,9 @@ snmp_agent_init(const char *snmp_socket, bool base_mib)
 void
 snmp_agent_close(bool base_mib)
 {
+	if (!snmp_running)
+		return;
+
 	if (base_mib)
 		snmp_unregister_mib(global_oid, OID_LENGTH(global_oid));
 	snmp_shutdown(global_name);
diff --git a/keepalived/vrrp/vrrp_snmp.c b/keepalived/vrrp/vrrp_snmp.c
index ca9d46768..db696159c 100644
--- a/keepalived/vrrp/vrrp_snmp.c
+++ b/keepalived/vrrp/vrrp_snmp.c
@@ -4552,6 +4552,9 @@ vrrp_handles_global_oid(void)
 void
 vrrp_snmp_agent_init(const char *snmp_socket)
 {
+	if (snmp_running)
+		return;
+
 	/* We let the check process handle the global OID if it is running and with snmp */
 	snmp_agent_init(snmp_socket, vrrp_handles_global_oid());
 
@@ -4581,6 +4584,9 @@ vrrp_snmp_agent_init(const char *snmp_socket)
 void
 vrrp_snmp_agent_close(void)
 {
+	if (!snmp_running)
+		return;
+
 #ifdef _WITH_SNMP_VRRP_
 	if (global_data->enable_snmp_vrrp)
 		snmp_unregister_mib(vrrp_oid, OID_LENGTH(vrrp_oid));
diff --git a/lib/scheduler.c b/lib/scheduler.c
index 0a1c334c3..9090a7f88 100644
--- a/lib/scheduler.c
+++ b/lib/scheduler.c
@@ -1630,7 +1630,7 @@ thread_fetch_next_queue(thread_master_t *m)
 				if (!ev->read) {
 					log_message(LOG_INFO, "scheduler: No read thread bound on fd:%d (fl:0x%.4X)"
 						      , ev->fd, ep_ev->events);
-					assert(0);
+					continue;
 				}
 				thread_move_ready(m, &m->read, ev->read, THREAD_READY_FD);
 				ev->read = NULL;
@@ -1641,7 +1641,7 @@ thread_fetch_next_queue(thread_master_t *m)
 				if (!ev->write) {
 					log_message(LOG_INFO, "scheduler: No write thread bound on fd:%d (fl:0x%.4X)"
 						      , ev->fd, ep_ev->events);
-					assert(0);
+					continue;
 				}
 				thread_move_ready(m, &m->write, ev->write, THREAD_READY_FD);
 				ev->write = NULL;
@@ -1710,7 +1710,12 @@ process_threads(thread_master_t *m)
 		thread = thread_trim_head(thread_list);
 		if (!shutting_down ||
 		    (thread->type == THREAD_READY_FD &&
-		     (thread->u.fd == m->timer_fd || thread->u.fd == m->signal_fd)) ||
+		     (thread->u.fd == m->timer_fd ||
+		      thread->u.fd == m->signal_fd
+#ifdef _WITH_SNMP_
+		      || FD_ISSET(thread->u.fd, &m->snmp_fdset)
+#endif
+							       )) ||
 		    thread->type == THREAD_CHILD ||
 		    thread->type == THREAD_CHILD_TIMEOUT ||
 		    thread->type == THREAD_CHILD_TERMINATED ||
diff --git a/lib/utils.c b/lib/utils.c
index 6f9ec254d..e5b82b524 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -789,7 +789,9 @@ FILE *fopen_safe(const char *path, const char *mode)
 {
 	int fd;
 	FILE *file;
+#ifdef ENABLE_LOG_FILE_APPEND
 	int flags = O_NOFOLLOW | O_CREAT | O_CLOEXEC;
+#endif
 	int sav_errno;
 	char file_tmp_name[] = "/tmp/keepalivedXXXXXX";