** 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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