--- ../httpd-2.4.3-org/httpd-2.4.3/server/scoreboard.c	2012-08-14 16:59:24.000000000 -0700
+++ server/scoreboard.c	2013-01-15 22:06:09.575503714 -0800
@@ -179,13 +179,19 @@
 
     /* The shared memory file must not exist before we create the
      * segment. */
-    apr_shm_remove(fname, pool); /* ignore errors */
+    rv = apr_shm_remove(fname, pool);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_INFO, rv, ap_server_conf, APLOGNO(00001)
+                     "Unable to remove the old scoreboard file \"%s\".", fname);
+    }   
 
     rv = apr_shm_create(&ap_scoreboard_shm, scoreboard_size, fname, pool);
     if (rv != APR_SUCCESS) {
         ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00001)
-                     "unable to create or access scoreboard \"%s\" "
-                     "(name-based shared memory failure)", fname);
+                     "Unable to create or access scoreboard \"%s\" with size %u "
+                     "(name-based shared memory failure). "
+                     "Please check the 'ServerLimit' and 'ThreadLimit' settings, or the memory usage.", 
+		     fname, scoreboard_size);
         return rv;
     }
 #endif /* APR_HAS_SHARED_MEMORY */
@@ -231,8 +237,10 @@
                             global_pool); /* anonymous shared memory */
         if ((rv != APR_SUCCESS) && (rv != APR_ENOTIMPL)) {
             ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00004)
-                         "Unable to create or access scoreboard "
-                         "(anonymous shared memory failure)");
+                         "Unable to create or access scoreboard with size %u "
+                         "(anonymous shared memory failure). "
+                         "Please check the 'ServerLimit' and 'ThreadLimit' settings, or the disk space.", 
+                         scoreboard_size);
             return rv;
         }
         /* Make up a filename and do name-based shmem */