I use the apache server packaged with Ubuntu 16.04 (the up to date version of ubuntu distribution), with 2 thousand of virtual hosts. I need to add / remove frequently new virtual hosts and use apache2 reload every hour. Everything works correctly, performance are goods. However, after 5 to 12 days, apache2 hangs with a coredump making all my customers offline. I need to kill it and restart it to have it working correctly again (of course I scripted this to be able to do this automatically to reduce the outage, but it is still annoying and i would like to help to have this fixed definitely in official version). This problem is very annoying for my business (I am an Open Source developer - author of AWStats log analyzer - and the project leader of Dolibarr ERP CRM project that is the project that I host as a Saas service via the offer DoliCloud). The problem can be reproduced, but is is long because i need to wait around 1 week, to have the trouble fixed. But it does not matter if it takes time to fix this. What is important is to find how we can avoid this coredump. I have several similar platforms, and all platforms have the trouble. I have technical knowledge, so I can make system actions if more information are required, but I have no knowledge in Apache and C coding and i am not able to analyze a core dump (but i can provide it). Because this bug is important for me, i would like to found or hire an Apache developer that can help me to solve this trouble. However I need help to tell me what I can/must do to progress in finding a solution to this bug. This is the following packages that are enabled: access_compat actions alias auth_basic authn_core authn_file authz_core authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir dump_io env expires file_cache filter headers include info log_forensic mime mpm_itk mpm_prefork negotiation php7.0 rewrite setenvif socache_shmcb ssl status substitute vhost_alias
This is link to download the coredump (it is 30Mb file): https://mega.nz/#!Rzpi2YbS!YwInf_n-psYhMXUCFa5lRAMsw38lH0dgByJqLAHjK_8 I can provides other coredump files from other similar platforms if this is necessary.
1. The core dump is not very useful outside the server it got generated. So it needs to be analyzed there. (see http://httpd.apache.org/dev/debugging.html). 2. As you are using a vendor provided httpd we don't know which patches they added. So they need to analyze first.Hence please open a ticket with Ubuntu first.