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Published Jun. 30, 2025

JSP file [/monitor/app_check.jsp] not found errors are flooding the logs

Written By

Sorin Pop

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Issue

  • After upgrading from 2023.q3.8 to 2024.q3.10, customer is seeing a lot of these errors in their logs:
    2024-12-19 11:43:51.749 WARN [https-jsse-nio2-11251-exec-3][code_jsp:163] {code="404", msg="JSP file [/monitor/app_check.jsp] not found", uri=/monitor/app_check.jsp} 2024-12-19 11:44:11.189 WARN [https-jsse-nio2-11251-exec-2][code_jsp:163] {code="404", msg="JSP file [/monitor/app_check.jsp] not found", uri=/monitor/app_check.jsp} 2024-12-19 11:44:11.905 WARN [https-jsse-nio2-11251-exec-11][code_jsp:163] {code="404", msg="JSP file [/monitor/app_check.jsp] not found", uri=/monitor/app_check.jsp} 2024-12-19 11:44:21.786 WARN [https-jsse-nio2-11251-exec-13][code_jsp:163] {code="404", msg="JSP file [/monitor/app_check.jsp] not found", uri=/monitor/app_check.jsp}

Environment

  • 2024.q3.10

Resolution

  • "

    I've found the source for these log messages, they do not come from Liferay. I noticed this in the HTTP access log:

    <redacted IP address> - - [19/Dec/2024:15:41:02 +0000] "GET /monitor/app_check.jsp HTTP/1.1" 404 61043 "-" "ELB-HealthChecker/2.0"

    "ELB-HealthChecker/2.0" indicates the request originates from the "Elastic Load Balancing" component of AWS.

 

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