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

[Andreas Thielen]

** Description changed:

  Hi there,
  
  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
  
  Prior to this single log entry there are a lot of graceful restarts many
- times per minute. Refer to following messages:
+ times per minute. Refer to following message dump just to give you an
+ example:
  
+ >>>>>>>>>>>>
  [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
  
  Apache MPM-Conf:
  <IfModule mpm_worker_module>
    StartServers           5
    MinSpareThreads        320
    MaxSpareThreads        640
    ThreadsPerChild        128
    MaxRequestWorkers      8192
    MaxConnectionsPerChild 0
    ThreadLimit            128
    ServerLimit            64
  </IfModule>
  
  Thera are approx. 600 virtual hosts configured.
  
  Best Regards,
  Andreas

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Title:
  Apache Crash after Security-Update

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