much nginx errors in log

[Azurel]

What this errors means? What can I do to fix this?

Plesk 11.5.30#31 (CentOS6)

/var/log/nginx/error.log

2014/02/06 21:31:15 [error] 13050#0: *9650578 upstream prematurely closed connection while reading response header from upstream, client: xx.xx.xx.xx, server: domain.com, request:

2014/02/06 21:31:17 [error] 13050#0: *9651913 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: xx.xx.xx.xx, server: domain.com, request:

014/02/06 21:31:17 [error] 13050#0: *9651729 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xx.xx.xx, server: domain.com, request:

2014/02/06 23:08:20 [error] 21403#0: accept4() failed (103: Software caused connection abort)

 

[IgorG]

If I'm not mistaken, this error may occur when Apache suddenly goes out. For example, Apache can be restarted without the option graceful in scope of some service procedures in the system. If at this moment there are any requests from clients, then nginx will generate these errors.

To resolve this error, you need to understand why Apache goes out and fix it.

 

[Azurel]

Thank you for your answer. You are right. In the apache log I found this:

[Thu Feb 06 21:31:15 2014] [notice] caught SIGTERM, shutting down
[Thu Feb 06 21:31:18 2014] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Thu Feb 06 21:31:18 2014] [notice] Digest: generating secret for digest authentication ...
[Thu Feb 06 21:31:18 2014] [notice] Digest: done
[Thu Feb 06 21:31:18 2014] [notice] mod_python: Creating 4 session mutexes based on 512 max processes and 0 max threads.
[Thu Feb 06 21:31:18 2014] [notice] mod_python: using mutex_directory /tmp
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Feb 06 21:31:18 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Thu Feb 06 21:31:18 2014] [notice] Apache/2.2.15 (Unix) DAV/2 mod_fcgid/2.3.9 mod_python/3.3.1 Python/2.6.6 mod_ssl/2.2.15 OpenSSL/1.0.0-fips mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

 

[IgorG]

Try to enable graceful restart for Apache - http://kb.parallels.com/112020

 

[Azurel]

Thank you. I have add in phpmyadmin(webadmin) "restart_apache_gracefully" with UNHEX(74727565)=true (in table misc)

 

[IgorG]

Thank you. I have add in phpmyadmin(webadmin) "restart_apache_gracefully" with UNHEX(74727565)=true (in table misc)

Did it help?

 

[Azurel]

I get this in apache log, when I modify "web server settings":

[Mon Feb 10 11:25:22 2014] [notice] Graceful restart requested, doing restart
[Mon Feb 10 11:25:22 2014] [notice] Digest: generating secret for digest authentication ...
[Mon Feb 10 11:25:22 2014] [notice] Digest: done
[Mon Feb 10 11:25:22 2014] [notice] mod_python: Creating 4 session mutexes based on 1000 max processes and 0 max threads.
[Mon Feb 10 11:25:22 2014] [notice] mod_python: using mutex_directory /tmp
[Mon Feb 10 11:25:23 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Mon Feb 10 11:25:23 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Mon Feb 10 11:25:23 2014] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Mon Feb 10 11:25:23 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Mon Feb 10 11:25:23 2014] [notice] Apache/2.2.15 (Unix) DAV/2 mod_fcgid/2.3.9 mod_python/3.3.1 Python/2.6.6 mod_ssl/2.2.15 OpenSSL/1.0.0-fips mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

BTW: I get with modify server settings a new fresh "cgi-bin/test" folder in httpdocs (11.5.30#32):
http://forum.parallels.com/showthre...folder-cgi-bin&p=710825&viewfull=1#post710825
Its not fixed completely in "MU#26".