https://issues.apache.org/bugzilla/show_bug.cgi?id=57504
Bug ID: 57504
Summary: Jasper task (JspC) throws NPE on taglibs in 7.0.58
Product: Tomcat 7
Version: trunk
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: [email protected]
Reporter: [email protected]
Created attachment 32400
--> https://issues.apache.org/bugzilla/attachment.cgi?id=32400&action=edit
Repeat build.xml
It seems like revision 1645615 broke the ant jasper task in 7.0.58 for taglibs.
Repeat:
1) Download and unzip apache-tomcat-7.0.58.zip and apache-ant-1.9.4-bin.zip to
a temporary directory.
2) Put the following into a new file build.xml in the directory: (attached,
based on
http://tomcat.apache.org/tomcat-7.0-doc/jasper-howto.html#Web_Application_Compilation)
<project>
<import file="apache-tomcat-7.0.58/bin/catalina-tasks.xml"/>
<target name="jspc">
<jasper
validateXml="false"
uriroot="apache-tomcat-7.0.58/webapps/examples"
webXmlFragment="tmp/WEB-INF/generated_web.xml"
outputDir="tmp/WEB-INF/src" />
</target>
</project>
3) Execute "apache-ant-1.9.4/bin/ant jspc" in the directory.
Expected result:
Compiled output in tmp/WEB-INF
Actual result:
Exception is thrown and only partial output to tmp/WEB-INF:
jspc:
[jasper] java.lang.NullPointerException
[jasper] at
org.apache.jasper.JspCompilationContext.getTldLocation(JspCompilationContext.java:618)
[jasper] at
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:409)
[jasper] at
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:475)
[jasper] at
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1410)
[jasper] at org.apache.jasper.compiler.Parser.parse(Parser.java:138)
[jasper] at
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
[jasper] at
org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
[jasper] at
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199)
[jasper] at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
[jasper] at org.apache.jasper.JspC.processFile(JspC.java:1213)
[jasper] at org.apache.jasper.JspC.execute(JspC.java:1364)
[jasper] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
[jasper] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[jasper] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[jasper] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[jasper] at java.lang.reflect.Method.invoke(Method.java:606)
[jasper] at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[jasper] at org.apache.tools.ant.Task.perform(Task.java:348)
[jasper] at org.apache.tools.ant.Target.execute(Target.java:435)
[jasper] at org.apache.tools.ant.Target.performTasks(Target.java:456)
[jasper] at
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
[jasper] at
org.apache.tools.ant.Project.executeTarget(Project.java:1364)
[jasper] at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[jasper] at
org.apache.tools.ant.Project.executeTargets(Project.java:1248)
[jasper] at org.apache.tools.ant.Main.runBuild(Main.java:851)
[jasper] at org.apache.tools.ant.Main.startAnt(Main.java:235)
[jasper] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
[jasper] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
If 7.0.58 is replaced by 7.0.57 then the repeat runs without any exception and
with complete output.
The problem seems to be the cleanup of the tldLocationsCache initialization in
revision 1645615, partially backported from revision 1541041, since it's still
used by JspCompilationContext.getTldLocation.
Possibly the fix is as easy as bringing back the initialization line.
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