io: fix EINPROGRESS check, also check that errno is not zero (#2497)

Signed-off-by: Eduardo Silva <eduardo@treasure-data.com>
fluent · Sep 6, 2020 · 57e4d42 · 57e4d42
1 parent 63b0577
commit 57e4d42
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/flb_io.c b/src/flb_io.c
@@ -167,7 +167,7 @@ static int net_io_connect_async(struct flb_upstream *u,
          * means a failure.
          */
         err = flb_socket_error(u_conn->fd);
-        if (!FLB_EINPROGRESS(err)) {
+        if (!FLB_EINPROGRESS(err) && err != 0) {
             flb_errno();
             flb_error("[io] connection #%i failed to: %s:%i",
                       u_conn->fd, u->tcp_host, u->tcp_port);