Differences

This shows you the differences between two versions of the page.

--- blog:apache_redhat_6_make_sock_bug [2014/05/30 03:23] – brett
+++ blog:apache_redhat_6_make_sock_bug [2014/05/30 03:54] (current) – brett
@@ Line 2: / Line 2: @@
 This is a fucker of a defect that affected RedHat 6.3, 6.4, 6.5 - which I've verified.  Probably 6.0, 6.1, 6.2 and 6.3 as well.
+I found this: https://issues.apache.org/bugzilla/show_bug.cgi?id=45863 but it was of no help and was more of a red-herring than anything else.
+<code>
+# httpd -version
+Server version: Apache/2.2.23 (Unix)
+Server built:   Feb 13 2013 02:41:10
+</code>
+Here is the output that you are confronted with
 <code>
 [Thu Sep 19 14:11:13 2013] [warn] VirtualHost localhost:82 overlaps with VirtualHost localhost:82, the first has precedence, perhaps you need a NameVirtualHost directive
@@ Line 11: / Line 19: @@
 </code>
-Doing an lsof on port 81 tells you nothing is listening.
+Doing an lsof, netstat, telnet or anything else you can think of on port 81 tells you nothing is listening.  OK so why the error message !
-Apache throws this in the STRACE saying it can't startup and the strace doesn't give you much clue.
+The strace is telling its trying to bind TWICE to the same port!  WTF.
 <code>
 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
@@ Line 24: / Line 32: @@
 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
 bind(4, {sa_family=AF_INET, sin_port=htons(81), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 EADDRINUSE (Address already in use)
-write(2, ""..., 78)               = 78
-close(4)                          = 0
-write(2, ""..., 46)               = 46
-write(2, ""..., 20)               = 20
 </code>
+The solution.  The trouble makers were found in /etc/hosts as follows
-The solution: simply stated the trouble makers were found in /etc/hosts as follows:
 <code>
 .0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
@@ Line 37: / Line 40: @@
 </code>
 Once we had removed 'localhost' and 'localhost.localdomain' from the ::1 definition line, apache/httpd could start successfully.
+UPDATE: In light of https://issues.apache.org/bugzilla/show_bug.cgi?id=52884
+In my configuration I had this
+<code>
+Listen localhost:81
+</code>
+If I had change it to this it would have also made the problem go away.
+<code>
+Listen 127.0.0.1:81
+</code>
 {{tag>apache}}