need some minimal timeout otherwise strange issues occur

servers/slapd/back-ldap/bind.c

@@ -286,7 +286,7 @@ ldap_back_start_tls(
 		if ( rc == LDAP_SUCCESS ) {
 			LDAPMessage	*res = NULL;
 			int		retries = 1;
-			struct timeval	tv = { 0, 0 };
+			struct timeval	tv = { 0, 100000 };
 
 retry:;
 			rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
@@ -811,7 +811,7 @@ ldap_back_op_result(
 	 * remote server response */
 	if ( ERR_OK( rs->sr_err ) ) {
 		int		rc;
-		struct timeval	tv = { 0, 0 };
+		struct timeval	tv = { 0, 100000 };
 
 retry:;
 		/* if result parsing fails, note the failure reason */

servers/slapd/back-ldap/search.c

@@ -179,6 +179,7 @@ ldap_back_search(
 
 	} else {
 		tv.tv_sec = 0;
+		tv.tv_usec = 100000;
 	}
 
 	if ( op->ors_attrs ) {

servers/slapd/back-meta/bind.c

@@ -211,7 +211,7 @@ rebind:;
 			op->o_ctrls, NULL, &msgid );
 	if ( rs->sr_err == LDAP_SUCCESS ) {
 		LDAPMessage	*res;
-		struct timeval	tv;
+		struct timeval	tv = { 0, 100000 };
 		int		rc;
 		int		nretries = mt->mt_nretries;
 
@@ -234,6 +234,8 @@ retry:;
 				if ( nretries > 0 ) {
 					nretries--;
 				}
+				tv.tv_sec = 0;
+				tv.tv_usec = 100000;
 				goto retry;
 			}
 			rs->sr_err = LDAP_BUSY;
@@ -380,7 +382,7 @@ rebind:;
 			NULL, NULL, &msgid );
 	if ( rc == LDAP_SUCCESS ) {
 		LDAPMessage	*res;
-		struct timeval	tv;
+		struct timeval	tv = { 0, 100000 };
 
 		/*
 		 * handle response!!!
@@ -401,6 +403,8 @@ retry:;
 				if ( nretries > 0 ) {
 					nretries--;
 				}
+				tv.tv_sec = 0;
+				tv.tv_usec = 100000;
 				goto retry;
 			}