About 10 hours ago, our web server stopped working. When restarting it, we see an error message:
nginx start failed. reason: No available memcached servers could be contacted
Funnily, we disabled memcached completely, so there shouldn't be any reason to look for memcached. I then activated memcached and told it to bind to localhost only. Testing with telnet was successful, but the error message didn't change.
I'm a little confused on what is going on. In trace.log I found a possible hint, when the failure started:
21:26:45.459:qtp1286783232-100491:http://localhost:8080/service/soap/AuthRequest REQUEST 127.0.0.1 POST null; zclient 8.8.9_GA_3006
21:26:45.467:qtp1286783232-100491:http://localhost:8080/service/soap/AuthRequest RESPONSE 200 text/xml;charset=utf-8
21:26:45.473:qtp1286783232-100535:http://localhost:8080/service/soap/GetInfoRequest REQUEST 127.0.0.1 POST null; zclient 8.8.9_GA_3006
21:26:45.476:qtp1286783232-100535:http://localhost:8080/service/soap/GetInfoRequest RESPONSE 500 text/xml;charset=utf-8
and repeating the last two REQUEST/RESPONS pairs multiple times.
What can I do to resolve the problem?
PS: This is version Release 8.8.9_GA_2055.RHEL7_64_20180703080917 RHEL7_64 FOSS edition, Patch 8.8.9_P1.