https://bz.apache.org/bugzilla/show_bug.cgi?id=59640
Bug ID: 59640
Summary: provide better error message on TldCache.getTaglibXml
TldResourcePath problem
Product: Tomcat 8
Version: 8.0.14
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: [email protected]
Reporter: [email protected]
quite some users appear to be affected by this backward incompatibility when
migrating to tomcat8
- http://marc.info/?l=tomcat-user&w=2&r=1&s=TldResourcePath&q=b
-
http://stackoverflow.com/questions/28296543/nullpointerexception-when-add-custom-taglib-in-jsp
-
http://stackoverflow.com/questions/25902137/error-compiling-jsps-in-apache-tomcat-8-0-12
- https://github.com/Confluex/Zuul/issues/76
just to name a few.
To alleviate the situation, please
1) cite the taglib-uri sought when it happens
2) cite the taglib-location sought when it happens
3) add the URL of a wiki or help page assisting to solve the problem
HTTP Status 500 - Unable to compile class for JSP
type Exception report
message Unable to compile class for JSP
description The server encountered an internal error that prevented it from
fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:579)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.apache.catalina.filters.ExpiresFilter.doFilter(ExpiresFilter.java:1200)
root cause
java.lang.NullPointerException
org.apache.tomcat.util.descriptor.tld.TldResourcePath.hashCode(TldResourcePath.java:156)
java.util.HashMap.hash(HashMap.java:338)
java.util.HashMap.get(HashMap.java:556)
org.apache.jasper.compiler.TldCache.getTaglibXml(TldCache.java:95)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:179)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:411)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:469)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1428)
org.apache.jasper.compiler.Parser.parse(Parser.java:139)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:227)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.apache.catalina.filters.ExpiresFilter.doFilter(ExpiresFilter.java:1200)
note The full stack trace of the root cause is available in the Apache
Tomcat/8.0.14 (Debian) logs.
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