[ERROR LOG]
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] service::jk_lb_worker.c (1647): Forcing recovery once for 2 workers
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] jk_open_socket::jk_connect.c (817): connect to 192.168.100.100:8109 failed (errno=111)
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] ajp_connect_to_endpoint::jk_ajp_common.c (1068): (web1) Failed opening socket to (192.168.100.100:8109) (errno=111)
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [error] ajp_send_request::jk_ajp_common.c (1728): (web1) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111)
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] ajp_service::jk_ajp_common.c (2773): (web1) sending request to tomcat failed (recoverable), because of error during request sending (attempt=1)
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [error] ajp_service::jk_ajp_common.c (2794): (web1) connecting to tomcat failed (rc=-3, errors=21, client_errors=2).
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] service::jk_lb_worker.c (1595): service failed, worker web1 is in error state
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] service::jk_lb_worker.c (1675): All tomcat instances are busy or in error state
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [error] service::jk_lb_worker.c (1680): All tomcat instances failed, no more workers left
[Tue Nov 15 10:53:06.582 2016] [10512:140002556106816] [info] jk_handler::mod_jk.c (2991): Service error=0 for worker=loadbalancer
[해결 방법]
해당 호스트와 포트로 텔넷 접속 시도
# telnet 192.168.100.100 8109
안붙으면 방화벽 확인 및 해제
Centos 7 방화벽 해제
# systemctl stop firewalld
Centos 7 리부팅시 방화벽 실행 안함
# systemctl disable firewalld
by. 조조나리
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