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--- blog:apache_redhat_6_make_sock_bug [2014/05/30 03:48] – brett
+++ blog:apache_redhat_6_make_sock_bug [2014/05/30 03:54] (current) – brett
@@ Line 21: / Line 21: @@
 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 32: / 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: simply stated the trouble makers were found in /etc/hosts as follows
+The solution.  The trouble makers were found in /etc/hosts as follows
 <code>
 .0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
 ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
 </code>
-Once we had removed 'localhost' and 'localhost.localdomain' from the ::1 definition line, apache/httpd could start successfully.  It boils down to being some sort of IPV6 issue.
+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
@@ Line 51: / Line 47: @@
 Listen localhost:81
 </code>
-So I change it to this
+If I had change it to this it would have also made the problem go away.
 <code>
 Listen 127.0.0.1:81
 </code>
-And the problem also went away -- very curious indeed.
 {{tag>apache}}