We have also this messages with severity "emergency": grep emerg /var/log/apache2/error.log [Wed Mar 09 07:09:31.099331 2016] [mpm_worker:emerg] [pid 26526:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 09:49:31.931429 2016] [mpm_worker:emerg] [pid 20322:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 11:00:09.663350 2016] [mpm_worker:emerg] [pid 3062:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 11:33:02.203333 2016] [mpm_worker:emerg] [pid 5608:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 11:33:24.130957 2016] [mpm_worker:emerg] [pid 9516:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 11:36:08.238661 2016] [mpm_worker:emerg] [pid 10392:tid 139668485949184] (35)Resource deadlock avoided: AH00272: apr_proc_mutex_lock failed before this child process served any requests. [Wed Mar 09 12:54:09.526485 2016] [mpm_worker:emerg] [pid 22783:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. [Wed Mar 09 13:11:18.312498 2016] [mpm_worker:emerg] [pid 26526:tid 139668485949184] (35)Resource deadlock avoided: AH00273: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx