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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16532 TagLibraryInfoImpl produces NullPointerException Summary: TagLibraryInfoImpl produces NullPointerException Product: Tomcat 4 Version: 4.1.12 Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: Other Component: Jasper 2 AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] I ran JspC via the ant-task proposed by the JavaDocs (<taskdef classname="org.apache.jasper.JspC" name="jasper2"/>) on a I think quite normal webapp like so: <jasper2 verbose="0" uriroot="${webapp.dir}" outputDir="${jsp.output.dir}" classDebugInfo="true" compile="true"/> (running directly from jspc.sh made no difference to the problem.) But this failed at the first file with a NullPointerException in TagLibraryInfoImpl around line 212, which is a catch clause stating Constants.message( "jsp.error.taglib.jarFileException", new Object[] {url.toString(), ex.getMessage()}, Logger.ERROR); But url is null in my situation. I investigated the cause and found it to be around line 192 which says if(ctxt.getClassLoader() != null && URLClassLoader.class.equals(ctxt.getClassLoader().getClass()) && path.startsWith("/")) path = path.substring(1,path.length()); In my situation this resulted in the paths to JARs of taglibs I use to be truncated from "/WEB-INF/lib/thejar.jar" to "WEB-INF/lib/thejar.jar", which in turn of course causes a MalformedURLException at the next line, url = ctxt.getResource(path); which is caught at the well-known catch-clause - but url is null! Frankly, I don't understand the URLClassLoader thing at all, but what I do understand is that the catch-clause, which would have reported the malformed URL or some other useful Exception containing information about the problem at hand, instead produces a genuinely unhelpful NullPointerException. What confuses me most, though, is this: after I removed the URLClassloader-statements, JspC compiled my webapp just fine... --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
