When a nss plugin returns NSS_STATUS_UNAVAIL with herrno = TRY_AGAIN or NO_DATA,
the no_data variable in gaih_inet() is set to a non-zero value. This variable is
used to signal to the rest of the gaih_inet procedure that no results are
available, which ignores the results of the other plugins.

This value should be reset upon success, like in the patch below:
--- a/sysdeps/posix/getaddrinfo.c       2010-11-22 16:21:19.000000000 -0500
+++ b/sysdeps/posix/getaddrinfo.c       2009-11-22 16:28:26.000000000 -0500
@@ -715,7 +715,10 @@ gaih_inet (const char *name, const struc
                                                   tmpbuflen, &rc, &herrno,
                                                   NULL));
                      if (status == NSS_STATUS_SUCCESS)
-                       break;
+                       {
+                         no_data = 0;
+                         break;
+                       }
                      if (status != NSS_STATUS_TRYAGAIN
                          || rc != ERANGE || herrno != NETDB_INTERNAL)
                        {