When jsp is executed first after initial start of the application server with Resin 4.0.59 or later, the following warning is output to the log once.
[xxxx-xx-xx xx:xx:xx.xxx] [resin-port-8080-74] WARN com.caucho.jsp.TldManager default 5isu3ksgcwz80 8f3o0jrn371fk2m - [] jar:file:/c:/resin-pro-4.0.xx/webapps/imart/WEB-INF/lib/java-portlet-container-2.0-im_8.0.1.jar!/portlet_2_0.tld:17: <tagclass> is an unexpected tag (parent <tag> starts at 14).
[xxxx-xx-xx xx:xx:xx.xxx] [resin-port-8080-74] WARN com.caucho.jsp.TldManager default 5isu3ksgcx281 8f3o0jrn371fk2m - [] jar:file:/c:/resin-pro-4.0.xx/webapps/imart/WEB-INF/lib/java-portlet-container-2.0-im_8.0.1.jar!/sun-portlet_2_0.tld:17: <tagclass> is an unexpected tag (parent <tag> starts at 14).
A warning is output to the log, but there is no problem in operation.
[Postscript on August 1, 2019]
In the following requirement of 2019 Summer, a warning has not been output to the log.
#29331 After the private application server is initially started, a warning is output to the log when jsp is executed.
https://issue.intra-mart.jp/issues/29331
In addition, for earlier versions, a warning is no longer output to the log after the following patch is applied.
OpenPortal Portlet Container (jp.co.intra_mart.vendor.open_portal_portlet_container@2.0.1-PATCH_001)
-- Target ------------------------------------------------------------------------
iAP/Accel Platform/2019 Spring or earlier
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FAQID:733