I just set up mod_jk with my Apache httpd 2.0.52 installation, but now when I try to start Apache, it has a segmentation fault. I've checked that I am using the mod_jk compiled for 2.0.x.. built against the same version I have, in fact. I've also verified that the path I'm giving to LoadModule is correct, and the permissions and the ownership of the file are the same as the rest of the modules'. When I remove the "LoadModule" command for mod_jk from my httpd.conf, there is no segmentation fault.

Nothing shows in Apache's error logs. I have tried restarting the server with this module using both service httpd restart and httpd.

These are the last few lines returned of strace httpd -X:

gettimeofday({1292100295, 434487}, NULL) = 0
socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = -1 EAFNOSUPPORT (Address family not supported by protocol)
socket(PF_NETLINK, SOCK_RAW, 0)         = 3
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=22378, groups=00000000}, [12]) = 0
time(NULL)                              = 1292100295
sendto(3, "\24\0\0\0\26\0\1\3\307\342\3M\0\0\0\0\0\305\333\267", 20, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"<\0\0\0\24\0\2\0\307\342\3MjW\0\0\2\10\200\376\1\0\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 664
recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"\24\0\0\0\3\0\2\0\307\342\3MjW\0\0\0\0\0\0\1\0\0\0\10\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 20
close(3)                                = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 22378 detached

Has anyone had a similar problem using Apache 2.0.52 with mod_jk? I might try downloading and building the source for the Apache server and mod_jk myself if there isn't a discovered fix for this.


Is this a precompiled mod_jk that you found? If so, then it's simple enough to just grab the latest source for mod_jk and compile it, I suspect this is where your problem is - I've compiled mod_jk against the vendor supplied (Red Hat) Apache a lot of times without segfaults.

Make sure httpd-devel is installed (Red Hat/CentOS)

Unpack the real JDK to some path, like /usr/local/jdk1.6.0_18/

Grab the "tomcat-connectors" source from tomcat.apache.org and compile it:

cd tomcat-connectors-1.2.28-src/native
./configure --with-apxs=/usr/sbin/apxs --with-java=/usr/local/jdk1.6.0_18 --enable-prefork
cp apache-2.0/mod_jk.so /etc/httpd/modules/

Your modules should now work as expected.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.