(gdb) where
#0  0x00007f81c02d79c1 in __strlen_sse2 () from /lib64/libc.so.6
#1  0x00007f81c0824afd in apr_pstrdup () from /usr/lib64/libapr-1.so.0
#2  0x00007f81b5e72cb9 in ?? () from /etc/httpd/modules/mod_proxy_cluster.so
#3  0x00007f81b5e74e92 in ?? () from /etc/httpd/modules/mod_proxy_cluster.so
#4  0x00007f81b5e7536c in ?? () from /etc/httpd/modules/mod_proxy_cluster.so
#5  0x00007f81c1d4f788 in ap_run_translate_name ()
#6  0x00007f81c1d51966 in ap_process_request_internal ()
#7  0x00007f81c1d63980 in ap_process_request ()
#8  0x00007f81c1d60858 in ?? ()
#9  0x00007f81c1d5c568 in ap_run_process_connection ()
#10 0x00007f81c1d68767 in ?? ()
#11 0x00007f81c1d68a7a in ?? ()
#12 0x00007f81c1d68dab in ap_mpm_run ()
#13 0x00007f81c1d40900 in main ()
(gdb) quit