[Bug 1432571] Re: Apache Crash after Security-Update

[Andreas Thielen]

** Description changed:

- Hallo,
+ Hi there,
  
- wir betreiben den apache mit mod_proxy_balancer und leiten unsere Http-
- Requests an Tomcat Applicationserver weiter. Seit dem Security-Update
- vom 10.03. (Ubuntu Security Notice USN-2523-1) haben wir das Problem,
- dass unser Apache nach einer Weile stoppt. Das Error-Log zeigt folgende
- Meldung:
+ currently we are using apache with the mod_proxy_balancer module to lead
+ HTTP requests to tomcat backend server.
+ 
+ Since a security patch on 10th of March (Ubuntu Security Notice
+ USN-2523-1), the apache stops working randomly. The error.log shows on
+ single message:
  
  [Sun Mar 15 10:22:18.483077 2015] [:emerg] [pid 24451:tid
  140709170571136] AH00020: Configuration Failed, exiting
  
- 
- Wir beobachten seither auch, dass vor einem Crash folgende Meldungen im Error-Log stehen und das mehrmals pro Minute, wie man am Zeitstempel erkennen kann:
+ Prior to this single log entry there are a lot of graceful restarts many
+ times per minute. Refer to following messages:
  
  [Sun Mar 15 10:22:16.718748 2015] [core:notice] [pid 24451:tid 140709170571136] AH00094: Command line: '/usr/sbin/apache2'
  [Sun Mar 15 10:22:16.777279 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00297: SIGUSR1 received.  Doing graceful restart
  [Sun Mar 15 10:22:16.956168 2015] [ssl:warn] [pid 24451:tid 140709170571136] AH02292: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
  [Sun Mar 15 10:22:16.956228 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00292: Apache/2.4.7 (Ubuntu) OpenSSL/1.0.1f configured -- resuming normal operations
  [Sun Mar 15 10:22:16.956232 2015] [core:notice] [pid 24451:tid 140709170571136] AH00094: Command line: '/usr/sbin/apache2'
  [Sun Mar 15 10:22:17.023168 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00297: SIGUSR1 received.  Doing graceful restart
  [Sun Mar 15 10:22:17.209792 2015] [ssl:warn] [pid 24451:tid 140709170571136] AH02292: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
  [Sun Mar 15 10:22:17.209846 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00292: Apache/2.4.7 (Ubuntu) OpenSSL/1.0.1f configured -- resuming normal operations
  [Sun Mar 15 10:22:17.209849 2015] [core:notice] [pid 24451:tid 140709170571136] AH00094: Command line: '/usr/sbin/apache2'
  [Sun Mar 15 10:22:17.840076 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00297: SIGUSR1 received.  Doing graceful restart
  [Sun Mar 15 10:22:18.039028 2015] [ssl:warn] [pid 24451:tid 140709170571136] AH02292: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
  [Sun Mar 15 10:22:18.039083 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00292: Apache/2.4.7 (Ubuntu) OpenSSL/1.0.1f configured -- resuming normal operations
  [Sun Mar 15 10:22:18.039088 2015] [core:notice] [pid 24451:tid 140709170571136] AH00094: Command line: '/usr/sbin/apache2'
  [Sun Mar 15 10:22:18.075983 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00297: SIGUSR1 received.  Doing graceful restart
  [Sun Mar 15 10:22:18.261200 2015] [ssl:warn] [pid 24451:tid 140709170571136] AH02292: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
  [Sun Mar 15 10:22:18.261255 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00292: Apache/2.4.7 (Ubuntu) OpenSSL/1.0.1f configured -- resuming normal operations
  [Sun Mar 15 10:22:18.261263 2015] [core:notice] [pid 24451:tid 140709170571136] AH00094: Command line: '/usr/sbin/apache2'
  [Sun Mar 15 10:22:18.310111 2015] [mpm_worker:notice] [pid 24451:tid 140709170571136] AH00297: SIGUSR1 received.  Doing graceful restart
  
+ Setup:  Ubuntu 14.04 LTS mit apache 2.4.7-1ubuntu4.4 on physical
+ hardware with CPU Intel® Xeon® E3-1270 v3 Quad-Core Haswell (incl.
+ Hyper-Threading), 32 GB ECC RAM, 2 x 240 GB SATA 6 Gb/s Data Center
+ Series SSD
  
- Unser Setup:  Ubuntu 14.04 LTS mit apache 2.4.7-1ubuntu4.4 auf Hardware Maschinen mit Intel® Xeon® E3-1270 v3 
- Quad-Core Haswell inkl. Hyper-Threading-Technologie, Arbeitsspeicher32 GB ECC RAM, Festplatten2 x 240 GB SATA 6 Gb/s Data Center Series SSD
- 
- Konfiguration:
- Anzal VHosts: ca.600
+ Apache MPM-Conf:
  <IfModule mpm_worker_module>
-   StartServers           5
-   MinSpareThreads        320
-   MaxSpareThreads        640
-   ThreadsPerChild        128
-   MaxRequestWorkers      8192
-   MaxConnectionsPerChild 0
-   ThreadLimit            128
-   ServerLimit            64
+   StartServers           5
+   MinSpareThreads        320
+   MaxSpareThreads        640
+   ThreadsPerChild        128
+   MaxRequestWorkers      8192
+   MaxConnectionsPerChild 0
+   ThreadLimit            128
+   ServerLimit            64
  </IfModule>
  
+ Thera are approx. 600 virtual hosts configured.
  
- Leider können wir uns das nicht erklären. Was könnte hierfür die Ursache sein?
- 
- Viele Grüße
+ Best Regards,
  Andreas

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Title:
  Apache Crash after Security-Update

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