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From "Tim McConnell (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (OPENJPA-1038) Enhancer java.lang.StackOverflowError exception when circular dependencies are encountered within embeddables
Date Mon, 04 May 2009 15:59:30 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tim McConnell resolved OPENJPA-1038.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 2.0.0

Issue is now resolved as the Enhancer (as of r765846) is able to detect indirect circular
dependencies without getting stack overflow exceptions and it also outputs a more useful Exception
message as below: 


[jpa.fvt/jpafvt.setup/echo] do.nothing:
[jpa.fvt/jpafvt.setup/echo]      [echo] Calling wsenhancer script.
[jpa.fvt/jpafvt.setup/echo]      [exec] 93  EmbeddableNested_JSE  INFO   [main] openjpa.Tool
- No targets were given.  Running on all classes in your persistent classes list, or all metadata
files in classpath directories if you have not listed your persistent classes.  Use -help
to display tool usage information.
[jpa.fvt/jpafvt.setup/echo]      [exec] 359  EmbeddableNested_JSE  INFO   [main] openjpa.Enhance
- Enhancing type "class suite.r80.base.embeddable.nested.entities.XMLEmbeddable02b".
[jpa.fvt/jpafvt.setup/echo]      [exec] 437  EmbeddableNested_JSE  INFO   [main] openjpa.Enhance
- Enhancing type "class suite.r80.base.embeddable.nested.entities.XMLEntity02".
[jpa.fvt/jpafvt.setup/echo]      [exec] Exception in thread "main" <openjpa-2.0.0-SNAPSHOT-r422266:737816
fatal user error> org.apache.openjpa.util.MetaDataException: Errors encountered while resolving
metadata.  See nested exceptions for details.
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.meta.MetaDataRepository.resolve(MetaDataRepository.java:563)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:308)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer.<init>(PCEnhancer.java:251)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:4573)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:4520)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer$1.run(PCEnhancer.java:4490)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.lib.conf.Configurations.launchRunnable(Configurations.java:726)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.lib.conf.Configurations.runAgainstAllAnchors(Configurations.java:716)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:4485)
[jpa.fvt/jpafvt.setup/echo]      [exec] 	at org.apache.openjpa.enhance.PCEnhancer.main(PCEnhancer.java:4476)
[jpa.fvt/jpafvt.setup/echo]      [exec] Caused by: <openjpa-2.0.0-SNAPSHOT-r422266:737816
fatal user error> org.apache.openjpa.util.MetaDataException: Field "suite.r80.base.embeddable.nested.entities.Embeddable05e.embeddable05f.suite.r80.base.embeddable.nested.entities.Embeddable05f.embeddable05a.suite.r80.base.embeddable.nested.entities.Embeddable05a.embeddable05b.suite.r80.base.embeddable.nested.entities.Embeddable05b.embeddable05c.suite.r80.base.embeddable.nested.entities.Embeddable05c.embeddable05d.suite.r80.base.embeddable.nested.entities.Embeddable05d.embeddable05e<class
suite.r80.base.embeddable.nested.entities.Embeddable05e>" attempts to recursively embed
its declaring type.


> Enhancer java.lang.StackOverflowError exception when circular dependencies are encountered
within embeddables
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-1038
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1038
>             Project: OpenJPA
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Tim McConnell
>            Assignee: Fay Wang
>             Fix For: 2.0.0
>
>
> Circular dependencies among embeddable are not allowed. When they are encountered by
the Enhancer it gets in an infinite loop causing a stack overflow exception as shown below.
It seems there should be a more graceful detection of this scenario and a more useful explanation
and/or description of the error. The failure is the same for both annotated and XML versions
of the entities/embeddables. 
> [jpa.fvt/jpafvt.setup/echo]      [exec] 1016  EmbeddableNested_JSE  TRACE  [main] openjpa.MetaData
-    Resolving field "suite.r80.base.embeddable.nested.entities.XMLEmbeddable03b@969030082.xmlEmbeddable03a".
> [jpa.fvt/jpafvt.setup/echo]      [exec] 1016  EmbeddableNested_JSE  TRACE  [main] openjpa.MetaData
- Generating default metadata for type "suite.r80.base.embeddable.nested.entities.XMLEmbeddable03a".
> [jpa.fvt/jpafvt.setup/echo]      [exec] 1016  EmbeddableNested_JSE  TRACE  [main] openjpa.MetaData
- Using reflection for metadata generation.
> [jpa.fvt/jpafvt.setup/echo]      [exec] 1016  EmbeddableNested_JSE  TRACE  [main] openjpa.MetaData
- Resolving embedded metadata for "suite.r80.base.embeddable.nested.entities.XMLEmbeddable03a@961886549".
> [jpa.fvt/jpafvt.setup/echo]      [exec] Exception in thread "main" java.lang.StackOverflowError
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at sun.nio.cs.SingleByteEncoder.encodeArrayLoop(SingleByteEncoder.java:76)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at sun.nio.cs.SingleByteEncoder.encodeLoop(SingleByteEncoder.java:152)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:556)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at sun.nio.cs.StreamEncoder$CharsetSE.implWrite(StreamEncoder.java:405)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:159)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at java.io.OutputStreamWriter.write(OutputStreamWriter.java:229)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:122)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at java.io.PrintStream.write(PrintStream.java:489)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at java.io.PrintStream.print(PrintStream.java:632)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at com.ibm.jvm.io.ConsolePrintStream.print(ConsolePrintStream.java:259)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.lib.log.LogFactoryImpl$LogImpl.log(LogFactoryImpl.java:306)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.lib.log.AbstractLog.trace(AbstractLog.java:72)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.lib.log.AbstractLog.trace(AbstractLog.java:67)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ClassMetaData.resolveMeta(ClassMetaData.java:1649)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ClassMetaData.resolve(ClassMetaData.java:1628)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ValueMetaDataImpl.resolve(ValueMetaDataImpl.java:417)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.FieldMetaData.resolve(FieldMetaData.java:1702)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ClassMetaData.resolveMeta(ClassMetaData.java:1693)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ClassMetaData.resolve(ClassMetaData.java:1628)
> [jpa.fvt/jpafvt.setup/echo]      [exec]     at org.apache.openjpa.meta.ValueMetaDataImpl.resolve(ValueMetaDataImpl.java:417)

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