The system previously had Tengine and the Yunsuo security protection module installed, and they had been running normally. However, after several recent restarts of Tengine (nginx), the program has been behaving abnormally 鈥?the backend cannot detect it, and nginx has no worker processes, only the master process.
Checking the nginx logs, a large number of the following errors are reported:
2016/09/18 10:40:41 [alert] 29558#0: worker process 30851 exited on signal 9
2016/09/18 10:40:41 [alert] 29558#0: worker process 30851 exited on signal 11
Using the command:
#dmesg
to check the system status, the following error was reported:
nginx[30587]: segfault at 0 ip 00007ffa4e8b9fe9 sp 00007fffa9ab98b0 error 4 in libsensitiveFilter.so[7ffa4e883000+77000]
Based on the libsensitiveFilter.so file, we inquired with the official support and received a reply that it is a file belonging to Yunsuo, and they suggested disabling the sensitive word filtering feature.
After disabling the sensitive word filtering and restarting Tengine (nginx), the service returned to normal.