Kodo enhancer throws ConcurrentModificationException

Question

Attached is the stacktrace i get during enhancement, inside ant build
process.
Kodo suddenly fails on classes that were enhanced correctly before, so I
guess its some internal bug.
Does anyone know why it happens?
raczer.
I use:
- kodo 2.4.0
- ant 1.5.1
begin 666 stacktrace.txt
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M8V%T:6]N17AC97!T:6]N#0H@(" @(%MJ9&]C72 @(" @870@:F%V82YU=&EL
M+E1R965-87 D16YT<GE)=&5R871O<BYN97AT16YT<GDH5')E94UA<"YJ879A
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M.3(I#0H@(" @(%MJ9&]C72 @(" @870@8V]M+G-O;&%R;65T<FEC+FMO9&\N
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`
end

Answer 1

This sounds like a manifestation of
http://bugzilla.solarmetric.com/show_bug.cgi?id=472 to me. Do you have
circular dependencies between classes defined in multiple metadata
files? For example, do you have a class Foo whose metadata is defined in
Foo.jdo, and a class Bar whose metadata is in Bar.jdo, and do Foo and
Bar have references to each other?
If this is the bug, the only current workaround is to put those classes
that have circular references into the same metadata file (a package.jdo
file or a system.jdo file).
-Patrick
Rafa__ Czerwi__ski wrote:
Attached is the stacktrace i get during enhancement, inside ant build
process.
Kodo suddenly fails on classes that were enhanced correctly before, so I
guess its some internal bug.
Does anyone know why it happens?
raczer.
I use:
- kodo 2.4.0
- ant 1.5.1
[jdoc] java.util.ConcurrentModificationException
[jdoc] at
java.util.TreeMap$EntryIterator.nextEntry(TreeMap.java:1022)
[jdoc] at java.util.TreeMap$KeyIterator.next(TreeMap.java:1047)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.finish(ClassMetaData.java:345)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.newInstance(ClassMetaData.java:268)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.getInstance(ClassMetaData.java:192)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.validateSuperclass(ClassMetaData.java:446)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.finish(ClassMetaData.java:333)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.newInstance(ClassMetaData.java:268)
[jdoc] at
com.solarmetric.kodo.meta.ClassMetaData.getInstance(ClassMetaData.java:192)
[jdoc] at
com.solarmetric.kodo.enhance.JDOEnhancer.(JDOEnhancer.java:224)
[jdoc] at
com.solarmetric.kodo.enhance.JDOEnhancer.enhance(JDOEnhancer.java:187)
[jdoc] at
com.solarmetric.kodo.enhance.JDOEnhancer.enhance(JDOEnhancer.java:135)
[jdoc] at
com.solarmetric.modules.integration.ant.JDOEnhancerTask.executeOn(JDOEnhancerTask.java:43)
[jdoc] at
com.solarmetric.modules.integration.ant.TaskBase.execute(TaskBase.java:118)
[jdoc] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:166)
[jdoc] at org.apache.tools.ant.Task.perform(Task.java:319)
[jdoc] at org.apache.tools.ant.Target.execute(Target.java:309)
[jdoc] at
org.apache.tools.ant.Target.performTasks(Target.java:336)
[jdoc] at
org.apache.tools.ant.Project.executeTarget(Project.java:1306)
[jdoc] at
org.apache.tools.ant.Project.executeTargets(Project.java:1250)
[jdoc] at org.apache.tools.ant.Main.runBuild(Main.java:610)
[jdoc] at org.apache.tools.ant.Main.start(Main.java:196)
[jdoc] at org.apache.tools.ant.Main.main(Main.java:235)
BUILD FAILED
Patrick Linskey [email protected]
SolarMetric Inc. http://www.solarmetric.com