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From Stefan Eissing <stefan.eiss...@greenbytes.de>
Subject Re: [VOTE] Release Apache httpd 2.4.28 as GA
Date Thu, 28 Sep 2017 07:54:49 GMT
Analyzing...

my checkout of branch/2.4.x does not show this.
my buildt of 2.4.28 with -deps as provided, does after while of letting:

while true; do h2load -t 8 -c 100 -n 10000 -m 5 -d gen/data-10k http://test.example.org:12345/;
done

run (data-10k is a 10k text file). The whole server setup is according to the mod_http2 test
cases
in  https://svn.apache.org/repos/asf/httpd/test/mod_h2/trunk

In 2.4.28 I have apr 1.6.2 and in my branch/2.4.x is a 1.5.x (which shows 1.5.3 in its header).

Will check if that is connected or not. Will also check if this happens for me on my Ubuntu.

Sporadically (less frequent), I can also see (not both 2.4.x and 2.4.28):
Thread 3 Crashed:
0   libsystem_kernel.dylib        	0x00007fffd3c34d42 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fffd3d22457 pthread_kill + 90
2   libsystem_c.dylib             	0x00007fffd3b9a4bb __abort + 140
3   libsystem_c.dylib             	0x00007fffd3b9a42f abort + 144
4   libsystem_pthread.dylib       	0x00007fffd3d23bc7 __pthread_abort + 49
5   libsystem_pthread.dylib       	0x00007fffd3d23c7b __pthread_abort_reason + 180
6   libsystem_pthread.dylib       	0x00007fffd3d1fd93 _pthread_mutex_unlock_drop + 167
7   mod_http2.so                  	0x000000010cb42b2b h2_beam_send + 1819 (h2_bucket_beam.c:965)
8   mod_http2.so                  	0x000000010cb59d31 send_out + 257 (h2_task.c:100)
9   mod_http2.so                  	0x000000010cb59146 h2_filter_slave_output + 294 (h2_task.c:176)
10  httpd                         	0x000000010c598829 ap_process_request_after_handler + 89
(http_request.c:366)
11  httpd                         	0x000000010c598ab6 ap_process_request + 22 (http_request.c:473)
12  mod_http2.so                  	0x000000010cb5874e h2_task_process_conn + 398 (h2_task.c:682)
13  httpd                         	0x000000010c5705f7 ap_run_process_connection + 55 (connection.c:42)
14  mod_http2.so                  	0x000000010cb599db h2_task_do + 539 (h2_task.c:640)
15  mod_http2.so                  	0x000000010cb5df24 slot_run + 260 (h2_workers.c:233)
16  libsystem_pthread.dylib       	0x00007fffd3d1f93b _pthread_body + 180
17  libsystem_pthread.dylib       	0x00007fffd3d1f887 _pthread_start + 286
18  libsystem_pthread.dylib       	0x00007fffd3d1f08d thread_start + 13

which is a call to apr_thread_mutex_unlock(). Without having checkinto pthread version, the
closest
similar report I could find on the net is https://sourceware.org/bugzilla/show_bug.cgi?id=17514

Will report when I know more.

-Stefan

> Am 27.09.2017 um 18:04 schrieb Luca Toscano <toscano.luca@gmail.com>:
> 
> Hi Stefan,
> 
> 2017-09-27 17:32 GMT+02:00 Stefan Eissing <stefan.eissing@greenbytes.de>:
> On my h2 load tests, the server sometimes crashes in an assertion failure (build in maintainer
mode):
> 
> How did you make the tests? It would be good for people to attempt to reproduce..
>  
> 
> macOS crash reporter:
> Thread 54 Crashed:
> 0   libsystem_kernel.dylib              0x00007fffd3c34d42 __pthread_kill + 10
> 1   libsystem_pthread.dylib             0x00007fffd3d22457 pthread_kill + 90
> 2   libsystem_c.dylib                   0x00007fffd3b9a4bb __abort + 140
> 3   libsystem_c.dylib                   0x00007fffd3b9a42f abort + 144
> 4   httpd                               0x000000010be99282 ap_log_assert + 130 (log.c:1696)
> 5   mod_mpm_event.so                    0x000000010c50b51c ap_queue_push + 188
> 6   mod_mpm_event.so                    0x000000010c509be2 listener_thread + 2226 (event.c:1749)
> 7   libsystem_pthread.dylib             0x00007fffd3d1f93b _pthread_body + 180
> 8   libsystem_pthread.dylib             0x00007fffd3d1f887 _pthread_start + 286
> 9   libsystem_pthread.dylib             0x00007fffd3d1f08d thread_start + 13
> 
> error_log:
> [Wed Sep 27 17:27:09.941040 2017] [mpm_event:notice] [pid 23404:tid 140736895005632]
AH00489: Apache/2.4.28 (Unix) OpenSSL/1.1.0e configured -- resuming normal operations
> [Wed Sep 27 17:27:09.941055 2017] [core:notice] [pid 23404:tid 140736895005632] AH00094:
Command line: '/opt/apache-2.4.x/bin/httpd -d /Users/sei/projects/httpd/test/mod_h2/2.4.x/gen/apache'
> [Wed Sep 27 17:29:43.207923 2017] [mpm_event:alert] [pid 30381:tid 123145361334272] (35)Resource
temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
> [Wed Sep 27 17:29:43.208904 2017] [mpm_event:crit] [pid 30381:tid 123145369382912] (9)Bad
file descriptor: apr_pollset_poll failed.  Attempting to shutdown process gracefully
> [Wed Sep 27 17:29:44.000147 2017] [core:notice] [pid 23404:tid 140736895005632] AH00052:
child pid 30381 exit signal Segmentation fault (11)
> [Wed Sep 27 17:29:44.208035 2017] [mpm_event:alert] [pid 30382:tid 123145438388224] (35)Resource
temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
> [Wed Sep 27 17:29:44.208925 2017] [mpm_event:crit] [pid 30382:tid 123145446436864] (9)Bad
file descriptor: apr_pollset_poll failed.  Attempting to shutdown process gracefully
> [Wed Sep 27 17:29:45.001702 2017] [core:notice] [pid 23404:tid 140736895005632] AH00052:
child pid 30382 exit signal Segmentation fault (11)
> [Wed Sep 27 17:29:48.881247 2017] [core:crit] [pid 32841:tid 123145544712192] AH00102:
[Wed Sep 27 17:29:48 2017] file fdqueue.c, line 390, assertion "!((queue)->nelts == (queue)->bounds)"
failed
> [Wed Sep 27 17:29:50.004871 2017] [core:notice] [pid 23404:tid 140736895005632] AH00052:
child pid 32841 exit signal Abort trap (6)
> [Wed Sep 27 17:29:52.366672 2017] [core:crit] [pid 35505:tid 123145420349440] AH00102:
[Wed Sep 27 17:29:52 2017] file fdqueue.c, line 390, assertion "!((queue)->nelts == (queue)->bounds)"
failed
> [Wed Sep 27 17:29:52.368902 2017] [core:crit] [pid 35488:tid 123145392611328] AH00102:
[Wed Sep 27 17:29:52 2017] file fdqueue.c, line 390, assertion "!((queue)->nelts == (queue)->bounds)"
failed
> [Wed Sep 27 17:29:53.007664 2017] [core:notice] [pid 23404:tid 140736895005632] AH00052:
child pid 35505 exit signal Abort trap (6)
> [Wed Sep 27 17:29:53.007741 2017] [core:notice] [pid 23404:tid 140736895005632] AH00052:
child pid 35488 exit signal Abort trap (6)
> 
> 
> Any relevant stacktrace or lead about where the problem might reside?
> 
> Luca 


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