On HPUX 11.x, the 'ENOBUFS, No buffer space available'

error occures because the accept() cannot complete.
You will not see ENOBUFS at 10.20 because the kernel
hides any occurrence from being returned from user space.
ENOBUFS at 11.0 TCP/IP is quite possible, and could
occur intermittently. As a work-around, we are going to
ingnore ENOBUFS.

Submitted by: madhusudan_mathihalli@hp.com
Reviewed by: Bill Stoddard

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92894 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/CHANGES b/CHANGES
index 0584ed86b70bcc22f9010fc792eb949f6e507dae..dc88eac1add749d9ed9ef1aa31bae1a989e74ee0 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,8 @@
 Changes with Apache 2.0.31-dev
+  *) HPUX 11.*: Do not kill the child process when accept() 
+     returns ENOBUFS on HPUX 11.*. (ported from a 1.3 patch
+     by [madhusudan_mathihalli@hp.com])
+     [Bill Stoddard]
 
   *) Fix a problem in the parsing of the <Proxy foo> directive.
      [Jeff Trawick]

diff --git a/os/unix/unixd.c b/os/unix/unixd.c
index e023c3864e9c0a4d70330a688613219b1b9e5afc..f7061bdc078a44f2b8b4710558ddb204c5cd046b 100644 (file)
--- a/os/unix/unixd.c
+++ b/os/unix/unixd.c
@@ -485,6 +485,18 @@ AP_DECLARE(apr_status_t) unixd_accept(void **accepted, ap_listen_rec *lr,
      * to just exit in most cases.
      */
     switch (status) {
+#if defined(HPUX11) && defined(ENOBUFS)
+        /* On HPUX 11.x, the 'ENOBUFS, No buffer space available'
+         * error occures because the accept() cannot complete.
+         * You will not see ENOBUFS at 10.20 because the kernel
+         * hides any occurrence from being returned from user space.
+         * ENOBUFS at 11.0 TCP/IP is quite possible, and could
+         * occur intermittently. As a work-around, we are going to
+         * ingnore ENOBUFS.
+         */
+        case ENOBUFS:
+#endif
+
 #ifdef EPROTO
         /* EPROTO on certain older kernels really means
          * ECONNABORTED, so we need to ignore it for them.