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From bugzi...@apache.org
Subject [Bug 53735] New: Update annotation scanning to be compatible with Java 7 class files
Date Fri, 17 Aug 2012 20:42:29 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=53735

          Priority: P2
            Bug ID: 53735
          Assignee: dev@tomcat.apache.org
           Summary: Update annotation scanning to be compatible with Java
                    7 class files
          Severity: normal
    Classification: Unclassified
                OS: Windows XP
          Reporter: knst.kolinko@gmail.com
          Hardware: PC
            Status: NEW
           Version: trunk
         Component: Catalina
           Product: Tomcat 8

As was reported on the users mailing list, the annotation scanning code may
fail when trying to scan a class compiled for Java 7. The thread:

"Tomcat 7.0.29 vs. Groovy with Java 7"
http://tomcat.markmail.org/thread/4y7jfmznleqdczwh

As said there, "It appears that when one installs the groovy-all-2.0.1-indy.jar
in a Tomcat web app, BCEL chokes on the Java 7 specific byte-code therein ala"
[[[
org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag
in constant pool: 15 at
org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:131)
at
org.apache.tomcat.util.bcel.classfile.ConstantPool.<init>(ConstantPool.java:60)
at
org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:209)
at
org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:119)
at
org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2066)
]]]

If the problem is with specific libraries (like Groovy 2.0), it is possible to
disable annotation scanning for them (see the thread above).

In general, though, as Tomcat 8 targets Java 7, it should be able to scan such
files.

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