diff -urN mod_fastcgi-2.4.2.org/fcgi_pm.c mod_fastcgi-2.4.2/fcgi_pm.c
--- mod_fastcgi-2.4.2.org/fcgi_pm.c	2004-03-07 18:43:25.801230680 +0100
+++ mod_fastcgi-2.4.2/fcgi_pm.c	2004-03-07 22:39:30.635790455 +0100
@@ -756,6 +756,7 @@
 static void reduce_privileges(void)
 {
     const char *name;
+    int have_user_name = 1;
 
     if (geteuid() != 0)
         return;
@@ -767,16 +768,23 @@
         struct passwd *ent = getpwuid(uid);
 
         if (ent == NULL) {
+	    have_user_name = 0;
+	    name = &ap_user_name[1];
+	    if (name == NULL) {
             ap_log_error(FCGI_LOG_ALERT, fcgi_apache_main_server,
                 "FastCGI: process manager exiting, getpwuid(%u) couldn't determine user name, "
                 "you probably need to modify the User directive", (unsigned)uid);
             exit(1);
-        }
-        name = ent->pw_name;
+	    }
+        } else
+    	    name = ent->pw_name;
     }
     else
         name = ap_user_name;
 
+    ap_log_error(FCGI_LOG_ALERT, fcgi_apache_main_server, "name=[%s]", name);
+    
+
     /* Change Group */
     if (setgid(ap_group_id) == -1) {
         ap_log_error(FCGI_LOG_ALERT, fcgi_apache_main_server,
@@ -787,7 +795,7 @@
     /* See Apache PR2580. Until its resolved, do it the same way CGI is done.. */
 
     /* Initialize supplementary groups */
-    if (initgroups(name, ap_group_id) == -1) {
+    if (have_user_name && initgroups(name, ap_group_id) == -1) {
         ap_log_error(FCGI_LOG_ALERT, fcgi_apache_main_server,
             "FastCGI: process manager exiting, initgroups(%s,%u) failed",
             name, (unsigned)ap_group_id);
@@ -1132,13 +1140,16 @@
                     s->uid = (uid_t)atol(user);
                     pw = getpwuid(s->uid);
                     if (!pw) {
+			s->username = apr_psprintf(sp, "%ld", (long)s->uid);
+			/*
                         ap_log_error(FCGI_LOG_CRIT, fcgi_apache_main_server,
                             "FastCGI: can't create (dynamic) server \"%s\": can't get uid/gid for wrapper: getwpuid(%ld) failed",
                             execName, (long)s->uid);
                         goto BagNewServer;
-                    }
+			*/
+                    } else
+			s->username = apr_pstrdup(sp, pw->pw_name);
                     s->user = apr_pstrdup(sp, user);
-                    s->username = apr_pstrdup(sp, pw->pw_name);
 
                     s->gid = (gid_t)atol(group);
                     s->group = apr_pstrdup(sp, group);
diff -urN mod_fastcgi-2.4.2.org/fcgi_util.c mod_fastcgi-2.4.2/fcgi_util.c
--- mod_fastcgi-2.4.2.org/fcgi_util.c	2004-03-07 18:43:25.803230257 +0100
+++ mod_fastcgi-2.4.2/fcgi_util.c	2004-03-07 22:39:30.637790026 +0100
@@ -462,23 +462,27 @@
     s->uid = uid;
     pw = getpwuid(uid);
     if (pw == NULL) {
+	s->user = apr_psprintf(p, "%ld", uid);
+	if (s->user == NULL)
         return apr_psprintf(p,
             "getpwuid() couldn't determine the username for uid '%ld', "
             "you probably need to modify the User directive: %s",
             (long)uid, strerror(errno));
-    }
-    s->user = apr_pstrdup(p, pw->pw_name);
+    } else
+	s->user = apr_pstrdup(p, pw->pw_name);
     s->username = s->user;
 
     s->gid = gid;
     gr = getgrgid(gid);
     if (gr == NULL) {
+	s->group = apr_psprintf(p, "%ld", gid);
+	if (s->group == NULL)
         return apr_psprintf(p,
             "getgrgid() couldn't determine the group name for gid '%ld', "
             "you probably need to modify the Group directive: %s",
             (long)gid, strerror(errno));
-    }
-    s->group = apr_pstrdup(p, gr->gr_name);
+    } else
+    	s->group = apr_pstrdup(p, gr->gr_name);
 
 #endif /* !WIN32 */