Bonjour,

Nous avons des erreurs de ce type dans nos serveurs Apache :
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[Fri Sep 15 10:31:13.376505 2017] [proxy_ajp:error] [pid 24821] (70007)The timeout specified has expired: AH01030: ajp_ilink_receive() can't receive header
[Fri Sep 15 10:31:13.376559 2017] [proxy_ajp:error] [pid 24821] [client 10.16.60.193:37367] AH00992: ajp_read_header: ajp_ilink_receive failed, referer: http://AdresseVIP/
[Fri Sep 15 10:31:13.376568 2017] [proxy_ajp:error] [pid 24821] (70007)The timeout specified has expired: [client 10.16.60.193:37367] AH00878: read response failed from IP_Apache_02:8009 (IP_Apache_02), referer: http://AdresseVIP/
[Fri Sep 15 10:31:18.354352 2017] [proxy_ajp:error] [pid 24860] (70007)The timeout specified has expired: AH01030: ajp_ilink_receive() can't receive header
[Fri Sep 15 10:31:18.354407 2017] [proxy_ajp:error] [pid 24860] [client 172.26.11.55:52841] AH00992: ajp_read_header: ajp_ilink_receive failed, referer: http://AdresseVIP/
[Fri Sep 15 10:31:18.354433 2017] [proxy_ajp:error] [pid 24860] (70007)The timeout specified has expired: [client 172.26.11.55:52841] AH00878: read response failed from IP_Apache_02:8009 (IP_Apache_02), referer: http://AdresseVIP/
[Fri Sep 15 10:31:22.211174 2017] [proxy_ajp:error] [pid 24947] (70007)The timeout specified has expired: AH01030: ajp_ilink_receive() can't receive header
[Fri Sep 15 10:31:22.211221 2017] [proxy_ajp:error] [pid 24947] [client 10.16.60.193:37409] AH00992: ajp_read_header: ajp_ilink_receive failed, referer: http://AdresseVIP/
[Fri Sep 15 10:31:22.211228 2017] [proxy_ajp:error] [pid 24947] (70007)The timeout specified has expired: [client 10.16.60.193:37409] AH00878: read response failed from IP_Apache_01:8009 (IP_Apache_01), referer: http://AdresseVIP/
 
[Fri Sep 15 10:38:50.936784 2017] [proxy_ajp:error] [pid 25276] ajp_msg_append_cvt_string(): BufferOverflowException 4 398
[Fri Sep 15 10:38:50.936827 2017] [proxy_ajp:error] [pid 25276] [client 172.26.10.199:49765] AH00974: ajp_marshal_into_msgb: Error appending the query string, referer: http://AdresseVIP/
[Fri Sep 15 10:38:50.936832 2017] [proxy_ajp:error] [pid 25276] [client 172.26.10.199:49765] AH00988: ajp_send_header: ajp_marshal_into_msgb failed, referer: http://AdresseVIP/
[Fri Sep 15 10:38:50.936836 2017] [proxy_ajp:error] [pid 25276] (120001)APR does not understand this error code: [client 172.26.10.199:49765] AH00868: request failed to IP_Apache_02:8009 (IP_Apache_02), referer: http://AdresseVIP/
[Fri Sep 15 10:39:06.659708 2017] [proxy_ajp:error] [pid 24901] ajp_msg_append_cvt_string(): BufferOverflowException 4 398
[Fri Sep 15 10:39:06.659772 2017] [proxy_ajp:error] [pid 24901] [client 172.26.10.199:49773] AH00974: ajp_marshal_into_msgb: Error appending the query string, referer: http://AdresseVIP/
[Fri Sep 15 10:39:06.659777 2017] [proxy_ajp:error] [pid 24901] [client 172.26.10.199:49773] AH00988: ajp_send_header: ajp_marshal_into_msgb failed, referer: http://AdresseVIP/
[Fri Sep 15 10:39:06.659781 2017] [proxy_ajp:error] [pid 24901] (120001)APR does not understand this error code: [client 172.26.10.199:49773] AH00868: request failed to IP_Apache_02:8009 (IP_Apache_02), referer: http://AdresseVIP/
Nous utilisons Apache 2.4 sous CentOS en frontend de serveurs Apache Tomcat 8. Les serveurs Apache jouent le rôle de Balancer vers les Tomcat.
Nous avons donc une adresse IP Virtuelle (VIP) fourni par KeepAlived et deux serveurs sur lesquels sont installé un Apache HTTPD et un Apache Tomcat.

J'ai vraiment du mal à comprendre la provenance de ces erreurs...

D'avance merci,