id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1135	Connections timing out after upgrading to 1.10.2	anttiviljami@…		"After upgrading from 1.10.1 without ALPN support to 1.10.2 with ALPN support on Ubuntu Trusty (this ppa: https://launchpad.net/~ondrej/+archive/ubuntu/nginx), we've been getting into situations where Nginx completely stops serving connections without any warning. 

This has been happening on multiple production hosts a less than a week after the upgrade. The nginx error log on the affected hosts gets these odd messages:

{{{
2016/11/19 09:04:21 [alert] 26819#26819: worker process 28247 exited on signal 6 (core dumped)
2016/11/19 09:04:21 [alert] 26819#26819: shared memory zone ""memstore"" was locked by 28247
ter process /usr/sbin/nginx: /build/nginx-silDYy/nginx-1.10.2/debian/modules/nchan/src/store/memory/memstore.c:670: nchan_store_init_worker: Assertion `procslot_found == 1' failed.
2016/11/19 09:04:21 [alert] 26819#26819: worker process 28251 exited on signal 6 (core dumped)
2016/11/19 09:04:21 [alert] 26819#26819: shared memory zone ""memstore"" was locked by 28251
ter process /usr/sbin/nginx: /build/nginx-silDYy/nginx-1.10.2/debian/modules/nchan/src/store/memory/memstore.c:670: nchan_store_init_worker: Assertion `procslot_found == 1' failed.
2016/11/19 09:04:21 [alert] 26819#26819: worker process 28252 exited on signal 6 (core dumped)
2016/11/19 09:04:21 [alert] 26819#26819: shared memory zone ""memstore"" was locked by 28252
ter process /usr/sbin/nginx: /build/nginx-silDYy/nginx-1.10.2/debian/modules/nchan/src/store/memory/memstore.c:670: nchan_store_init_worker: Assertion `procslot_found == 1' failed.
2016/11/19 09:04:21 [alert] 26819#26819: worker process 28249 exited on signal 6 (core dumped)
2016/11/19 09:04:21 [alert] 26819#26819: shared memory zone ""memstore"" was locked by 28249
}}}

After restarting Nginx, everything works okay again.

Thank you for your assistance!"	defect	closed	critical		nginx-core	1.10.x	invalid	memstore		Linux host1.swd.local 4.4.0-45-generic #66~14.04.1-Ubuntu SMP Wed Oct 19 15:05:38 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.10.2
built with OpenSSL 1.0.2j  26 Sep 2016
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_spdy_module --with-http_dav_module --with-http_slice_module --with-threads --with-http_addition_module --with-http_flv_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_mp4_module --with-http_perl_module=dynamic --with-http_random_index_module --with-http_secure_link_module --with-http_sub_module --with-http_xslt_module=dynamic --with-mail=dynamic --with-mail_ssl_module --with-stream=dynamic --with-stream_ssl_module --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/headers-more-nginx-module --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-auth-pam --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-cache-purge --add-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-dav-ext-module --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-development-kit --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-echo --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/ngx-fancyindex --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nchan --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-lua --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-upload-progress --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/nginx-upstream-fair --add-dynamic-module=/build/nginx-silDYy/nginx-1.10.2/debian/modules/ngx_http_substitutions_filter_module"