Log: [info] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.

[oschaaf]

Not a real problem, but the message isn't very helpful -- or actually seems to raise concerns.
Perhaps the message can be degraded to debug instead of info level.

[centminmod]

yes it would be great if there's an option to hide or disable verbose info messages like this. It's confusing quite a few users

[jsamuel]

Unfortunately, we (ServerPilot) are going to have to skip 1.9.32.1 because of this message. We don't have time to build PSOL from source to remove this message and it's not an option for us to push out an nginx build to all of our users that will issue this warning. We know from past experience how much concern unnecessary debugging messages like this will create among our users.

@jsamuel That is ridiculous; if your users are so sensitive that they can't handle a debug message, and instead would rather settle for a reduced quality of optimization (provided for free I might add), then you either need to provide more education on the subject or stop providing services to children.

[oschaaf]

@jsamuel Would an option to filter messages at the configuration level have helped here?
E.g. something like pagespeed MessageFilter "No threading detected*"?

[jsamuel]

@alicemargatroid My comment was not meant to disrespect the developers or their efforts in any way. Rather, I felt they should know that in certain use cases, these types of messages have more impact on users than they may realize. I'm always glad when users of my software let me know when something small I may have overlooked is very important to them.

[jsamuel]

@oschaaf An option to filter messages would not be a great solution for us. We don't mind informational messages going to the nginx log. The problem for us is when there are noncritical messages going to stdout/stderr when nginx is starting.

[oschaaf]

#815 sends messages that get logged early during initialization to error.log

[msva]

@oschaaf nah. It produces segfault (if nginx built without debug) or SIGABRT if nginx is built with debug info:

(gdb) cont
Continuing.
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok

Program received signal SIGSEGV, Segmentation fault.
0x082d55b9 in ?? ()
(gdb) bt
#0  0x082d55b9 in ?? ()
#1  0x082daec4 in ?? ()
#2  0x082db6ce in ?? ()
#3  0x08173d39 in net_instaweb::NgxRewriteDriverFactory::~NgxRewriteDriverFactory() ()
#4  0x08173ea0 in net_instaweb::NgxRewriteDriverFactory::~NgxRewriteDriverFactory() ()
#5  0x0816d239 in ?? ()
#6  0x0808c9a2 in ngx_init_cycle ()
#7  0x0807d41a in main ()

(gdb) cont
Continuing.
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: third_party/chromium/src/base/memory/scoped_ptr.h:376: T* scoped_ptr<T, D>::operator->() const [with T = net_instaweb::SystemCaches, D = base::DefaultDeleter<net_instaweb::SystemCaches>]: Assertion `impl_.get() != __null' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff2c025c5 in raise () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff2c025c5 in raise () from /lib64/libc.so.6
#1  0x00007ffff2c03a48 in abort () from /lib64/libc.so.6
#2  0x00007ffff2bfb6b2 in __assert_fail_base () from /lib64/libc.so.6
#3  0x00007ffff2bfb762 in __assert_fail () from /lib64/libc.so.6
#4  0x000055555597c413 in scoped_ptr<net_instaweb::SystemCaches, base::DefaultDeleter<net_instaweb::SystemCaches> >::operator-> (this=0x555556fa6618) at third_party/chromium/src/base/memory/scoped_ptr.h:376
#5  0x0000555555977fef in net_instaweb::SystemRewriteDriverFactory::StopCacheActivity (this=0x555556fa6230) at net/instaweb/system/system_rewrite_driver_factory.cc:448
#6  0x0000555555977d7a in net_instaweb::SystemRewriteDriverFactory::ShutDown (this=0x555556fa6230) at net/instaweb/system/system_rewrite_driver_factory.cc:457
#7  0x00005555557844e0 in net_instaweb::NgxRewriteDriverFactory::~NgxRewriteDriverFactory() ()
#8  0x0000555555784629 in net_instaweb::NgxRewriteDriverFactory::~NgxRewriteDriverFactory() ()
#9  0x000055555577dcae in net_instaweb::(anonymous namespace)::ps_init_module(ngx_cycle_s*) ()
#10 0x000055555566bbfb in ngx_init_cycle ()
#11 0x000055555565978a in main ()

ngx info, if any:

# nginx -V
nginx version: nginx/1.7.5
TLS SNI support enabled
configure arguments: --prefix=/usr --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --pid-path=/run/nginx.pid --lock-path=/run/lock/nginx.lock --with-cc-opt=-I/usr/include --with-ld-opt=-L/usr/lib --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --with-file-aio --with-aio_module --with-ipv6 --with-pcre --with-pcre-jit --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_degradation_module --with-http_flv_module --with-http_geoip_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_mp4_module --with-http_perl_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_spdy_module --with-http_stub_status_module --with-http_sub_module --with-http_xslt_module --with-http_realip_module --add-module=ext/ngx_devel_kit-0.2.19 --add-module=ext/set-misc-nginx-module-0.26 --add-module=ext/echo-nginx-module-0.56 --add-module=ext/memc-nginx-module-0.15 --add-module=ext/lua-nginx-module-25c4bdd6b68e54f241fff9018ec4aa7a65426b31 --add-module=ext/lua-upstream-nginx-module-0.02 --add-module=ext/replace-filter-nginx-module-0.01rc5 --add-module=ext/encrypted-session-nginx-module-0.03 --add-module=ext/headers-more-nginx-module-0.25 --add-module=ext/srcache-nginx-module-0.28 --add-module=ext/rds-json-nginx-module-0.13 --add-module=ext/rds-csv-nginx-module-0.05 --add-module=ext/ngx_postgres-1.0rc5 --add-module=ext/ngx_coolkit-0.2rc1 --add-module=ext/ngx_pagespeed-762b05ed7816ff649580a6e87576e2e5a8925a6a --add-module=ext/passenger-release-4.0.52/ext/nginx --add-module=ext/nginx-push-stream-module-0.4.0 --add-module=ext/ngx_ctpp2-0.5 --add-module=ext/ngx_supervisord-1.4 --add-module=ext/xss-nginx-module-0.04 --add-module=ext/array-var-nginx-module-0.03 --add-module=ext/form-input-nginx-module-0.10 --add-module=ext/iconv-nginx-module-0.10 --add-module=ext/ngx-fancyindex-0.3.4 --add-module=ext/nginx-upload-progress-module-0.9.1 --add-module=ext/ngx_cache_purge-2.1 --add-module=ext/nginx-ey-balancer-0.0.8 --add-module=ext/ngx_slowfs_cache-1.10 --add-module=ext/nginx_upstream_check_module-0.1.9 --add-module=ext/ngx_metrics-0.1.1 --add-module=ext/naxsi-0.53-2/naxsi_src --add-module=ext/nginx-dav-ext-module-0.0.3 --add-module=ext/ngx_http_auth_pam_module-1.3 --add-module=ext/nginx-rtmp-module-5fb4c99ca93442c571354af6a40a4f3ef736af57 --with-http_ssl_module --with-google_perftools_module --add-module=ext/mod_rrd_graph-0.2.0 --add-module=ext/nginx-goodies-nginx-sticky-module-ng-bd312d586752 --add-module=ext/nginx_ajp_module-0.3.0 --with-mail --with-mail_ssl_module --user=web --group=web

[oschaaf]

@msva Ouch - thanks for letting me know! Back to the drawing board.
At which point does this happen? After a reload?

[oschaaf]

@msva Never mind, I can reproduce it - looking into it.

[oschaaf]

I closed #815, as it looks like a different approach is needed to accomplish forwarding log messages emitted during PageSpeed's configuration/initialisation phase to error.log.