For the completeness of issue reporting, please run the following script and post the output:
#!/usr/bin/perl use strict; use warnings FATAL => 'all'; use ModPerl::TestReport; ModPerl::TestReport->new(@ARGV)->run; Jie ________________________________ From: William N. Braswell, Jr. [william.brasw...@autoparallel.com] Sent: Tuesday, November 15, 2016 8:01 PM To: Jie Gao Cc: modperl@perl.apache.org Subject: Re: mod_perl Silent Failure, Very Mysterious Hello Jie & Friends, I got the core dump out of gdb and also some hopefully-helpful output. Here is the output from gdb (not the core dump which is binary of course): http://hastebin.com/okaxacuriq.scala Then again maybe we have a problem because I'm missing debugging symbols inside /usr/sbin/apache2? Program received signal SIGSEGV, Segmentation fault. 0x00007fffeed67a00 in ?? () Note the ?? part in the output above... Where do I go from here? Thanks, ~ Will On 11/15/2016 at 12:14 AM, "William N. Braswell, Jr." <william.brasw...@autoparallel.com> wrote: Hi Jie, I have captured the output of `strace -f /usr/sbin/apache2 -e trace8 -k start`: http://hastebin.com/unupocozop.pl Looks like it is dying with a segfault, but I'm not sure what is causing this??? Thanks so much for your help!!! :-) ~ Will [[[ BEGIN PASTE SNIPPET ]]] [pid 6550] stat("blib/lib/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("blib/lib/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/etc/perl/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/etc/perl/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/local/lib/x86_64-linux-gnu/perl/5.22.1/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/local/lib/x86_64-linux-gnu/perl/5.22.1/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/local/share/perl/5.22.1/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/local/share/perl/5.22.1/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/lib/x86_64-linux-gnu/perl5/5.22/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/lib/x86_64-linux-gnu/perl5/5.22/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/share/perl5/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/share/perl5/DynaLoader.pm", 0x7ffdda87f1b0) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/lib/x86_64-linux-gnu/perl/5.22/DynaLoader.pmc", 0x7ffdda87f280) = -1 ENOENT (No such file or directory) [pid 6550] stat("/usr/lib/x86_64-linux-gnu/perl/5.22/DynaLoader.pm", {st_mode=S_IFREG|0644, st_size=10748, ...}) = 0 [pid 6550] open("/usr/lib/x86_64-linux-gnu/perl/5.22/DynaLoader.pm", O_RDONLY) = 5 [pid 6550] ioctl(5, TCGETS, 0x7ffdda87ef50) = -1 ENOTTY (Inappropriate ioctl for device) [pid 6550] lseek(5, 0, SEEK_CUR) = 0 [pid 6550] read(5, "# Generated from DynaLoader_pm.P"..., 8192) = 8192 [pid 6550] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x7f491064fa00} --- [pid 6550] chdir("/etc/apache2") = 0 [pid 6550] rt_sigaction(SIGSEGV, {SIG_DFL, [], SA_RESTORER|SA_INTERRUPT, 0x7f4918dea3d0}, {SIG_DFL, [], SA_RESTORER|SA_RESETHAND, 0x7f4918dea3d0}, 8) = 0 [pid 6550] kill(6550, SIGSEGV) = 0 [pid 6550] rt_sigreturn({mask=[]}) = 139951873083648 [pid 6550] --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_USER, si_pid=6550, si_uid=0} --- [pid 6549] +++ exited with 0 +++ +++ killed by SIGSEGV (core dumped) +++ [[[ END PASTE SNIPPET ]]] On 11/14/2016 at 11:54 PM, "Jie Gao" <j....@sydney.edu.au> wrote: Add the "-f" flag to strace and see what errors you get. Regards, Jie * William N. Braswell, Jr. <william.brasw...@autoparallel.com> wrote: > Date: Mon, 14 Nov 2016 23:27:53 -0600 > From: "William N. Braswell, Jr." <william.brasw...@autoparallel.com> > To: modperl@perl.apache.org > Subject: mod_perl Silent Failure, Very Mysterious > > Hello everyone, I'm trying to enable a web app (Catalyst ShinyCMS) to > run under mod_perl, it is definitely supposed to work but it fails > without any errors, and I've been trying for several days to get it > working. > My system info: > * Perl 5, version 22, subversion 1 (v5.22.1) built for > x86_64-linux-gnu-thread-multi > * libapache2-mod-perl2 v2.0.9-4ubuntu1 > * Apache/2.4.18 (Ubuntu) > * $Apache::Test::VERSION = 1.39 > * $Catalyst::VERSION = 5.90112 > * $ShinyCMS::VERSION = 0.007 > I know the app already functions properly when running via the > stand-alone test server script (PSGI) or fastcgi, and I am able to run > a trivial Catalyst test application successfully under mod_perl, so > this issue seems to have something to do with the interaction between > the ShinyCMS app and mod_perl. > I have added print debug statements in my app, so when I call my app > from within the Apache site conf file then I can see the debug > statements prove that it is successfully going all the way through my > app, and it even returns control to the embedded code w/in the Apache > site conf file, but it still just silently fails anyway with the > following non-descriptive error: > "The apache2 instance did not start within 20 seconds. Please read the > log files to discover problems" > Unfortunately the log files do not provide any additional information > whatsoever! > Here are my Apache config files and the output of trying to start > Apache manually, you can see my ">" statements which prove that my > ShinyCMS app code is definitely executing all the way through and > returning control to Apache: > http://hastebin.com/rulixitole.php > http://hastebin.com/wevicagano.rb > This is a really mysterious issue, when I run `apache2ctl -e debug -k > start` as seen in the link above, it goes through the motions as if it > is starting correctly, and it does not give any error messages, but > when apache2ctl is done there simply are not any apache processes > running... > I only found 1 person on google with a possibly-similar issue, but he > told me that he never found a solution: > https://github.com/timbunce/devel-nytprof/issues/89 > I also found 1 person on the mod_perl mailing list archives with > another possibly-similar issue, but I have no way to follow up, and > I'm not sure of the best way to totally rebuild everything from > source: > https://mail-archives.apache.org/mod_mbox/perl-modperl/200207.mbox/%3c4a19f19a1bb4d51183220020ed06971401288...@exch2.iso-ne.com%3E > I have asked for help on IRC #httpd, user Unbeliever suggested I > ascertain my real /usr/sbin/apache2 command line and run it through > strace, then post to this mailing list. > I used -x in apache2ctl which showed me I was simply sourcing > /tmp/apache2/envvars and then running `/usr/sbin/apache2 -e trace8 -k > start` which are the exact same args as accepted by the apache2ctl > script. > I have now run `strace /usr/sbin/apache2 -e trace8 -k start` which > generates 2.5MB of text output, I have pasted the last few pages of it > on hastebin, I can post the whole thing for download if needed: > http://hastebin.com/idemogexiq.erl > I am not sure how to interpret the results of the strace command > output and debug this issue, help please? > Any and all assistance is greatly appreciated! :-) > Thanks,~ Will
