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From Satish Kumar <satish.kumar.just.d...@gmail.com>
Subject processing of tlds failed -- application still works -- why?
Date Sun, 26 Dec 2010 19:44:54 GMT
Hi All,

I am seeing the error below while deploying a web application on Tomcat
6.0.16. Note that the parser used for processing tlds is Crimson -- I expect
Tomcat to use the default Xerces parser to process tlds, but it using
Crimson parser that is in a jar in WEB-INF/lib. It seems this issue is
related to bug 29936 fixed in 6.0.17:
https://issues.apache.org/bugzilla/show_bug.cgi?id=29936 . I don't see this
error on Tomcat 6.0.18.

Question: My application works fine. The custom tags defined in the tld the
parsing failed on still work. Why do the custom tags work when tld parsing
failed? Can this error be ignored? What is the purpose of method
processTlds? (to create tld cache?)

Ref:
http://tomcat.apache.org/tomcat-5.5-doc/config/context.html#Standard_Implementation
What happens if I set processTlds context attribute to false while tlds are
used in the webapp?


ERROR [main] (Digester.java:1555) - Parse Fatal Error at line 1 column -1:
Relative URI "web-jsptaglib_1_1.dtd"; can not be resolved without a base
URI.
org.xml.sax.SAXParseException: Relative URI "web-jsptaglib_1_1.dtd"; can not
be resolved without a base URI.
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3182)
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3176)
        at org.apache.crimson.parser.Parser2.resolveURI(Parser2.java:2758)
        at
org.apache.crimson.parser.Parser2.maybeExternalID(Parser2.java:2730)
        at
org.apache.crimson.parser.Parser2.maybeDoctypeDecl(Parser2.java:1129)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:489)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
        at
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)
        at
org.apache.tomcat.util.digester.Digester.parse(Digester.java:1644)
        at
org.apache.catalina.startup.TldConfig.tldScanStream(TldConfig.java:518)
        at
org.apache.catalina.startup.TldConfig.tldScanTld(TldConfig.java:555)
        at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:295)
        at
org.apache.catalina.core.StandardContext.processTlds(StandardContext.java:4441)


Thanks!

Satish

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