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https://issues.apache.org/jira/browse/UIMA-4793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428082#comment-15428082
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Marshall Schor edited comment on UIMA-4793 at 8/19/16 12:21 PM:
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OK, at construction time, I'll locate the resource bundle (climbing the
callers, and using the current thread context loader) and save the bundle in
the exception, and use it to create the message if and when it's requested.
was (Author: schor):
I figured out a (good) way to handle this I think. At construction time, I'll
save the current value of the thread context loader, and at message creation
time, I'll pass that in as another loader to consider when looking for the
bundle.
> Unable to localize exceptions when using alternative classloader
> ----------------------------------------------------------------
>
> Key: UIMA-4793
> URL: https://issues.apache.org/jira/browse/UIMA-4793
> Project: UIMA
> Issue Type: Bug
> Components: Core Java Framework
> Affects Versions: 2.8.1SDK
> Reporter: Richard Eckart de Castilho
>
> If a component is initialized through a resource manager with a custom
> classloader, then it may not have access to its localized exception message
> bundles.
> The reason is, that within the classloader chain, the CL which knows about
> the Core UIMA framework is at a higher level than the CL used by the resource
> manager that created the component. The component CL would have access to the
> message bundle, but InterationalizedException uses it's own classloader (the
> higher level one that knows about Core UIMA) to load message bundles:
> {noformat}
> // locate the resource bundle for this exception's messages
> // turn over the classloader of the current object explicitly, so
> that the
> // message resolving also works for derived exception classes
> ResourceBundle bundle = ResourceBundle.getBundle(
> getResourceBundleName(), aLocale, this.getClass()
> .getClassLoader());
> {noformat}
> {noformat}
> Thread [main] (Suspended (exception MissingResourceException))
> owns: PrintWriter (id=92)
> owns: ThrowableInformation (id=93)
> owns: ConsoleAppender (id=94)
> owns: RootLogger (id=95)
> ResourceBundle.throwMissingResourceException(String, Locale, Throwable)
> line: 1564
> ResourceBundle.getBundleImpl(String, Locale, ClassLoader,
> ResourceBundle$Control) line: 1387
> ResourceBundle.getBundle(String, Locale, ClassLoader) line: 1082
>
> AnalysisEngineProcessException(InternationalizedException).getLocalizedMessage(Locale)
> line: 240
>
> AnalysisEngineProcessException(InternationalizedException).getLocalizedMessage()
> line: 218
> AnalysisEngineProcessException(Throwable).toString() line: 480
> String.valueOf(Object) line: 2994
> PrintWriter.println(Object) line: 754
> Throwable$WrappedPrintWriter.println(Object) line: 764
>
> AnalysisEngineProcessException(Throwable).printStackTrace(Throwable$PrintStreamOrWriter)
> line: 655
> AnalysisEngineProcessException(Throwable).printStackTrace(PrintWriter)
> line: 721
> DefaultThrowableRenderer.render(Throwable) line: 60
> ThrowableInformation.getThrowableStrRep() line: 87
> LoggingEvent.getThrowableStrRep() line: 413
> ConsoleAppender(WriterAppender).subAppend(LoggingEvent) line: 313
> ConsoleAppender(WriterAppender).append(LoggingEvent) line: 162
> ConsoleAppender(AppenderSkeleton).doAppend(LoggingEvent) line: 251
> AppenderAttachableImpl.appendLoopOnAppenders(LoggingEvent) line: 66
> Logger(Category).callAppenders(LoggingEvent) line: 206
> Logger(Category).forcedLog(String, Priority, Object, Throwable) line:
> 391
> Logger(Category).log(String, Priority, Object, Throwable) line: 856
> Log4jLogger_impl.log(Level, String, Throwable) line: 272
> PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(CAS) line:
> 417
> PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(CAS) line: 308
> PrimitiveAnalysisEngine_impl(AnalysisEngineImplBase).process(CAS) line:
> 269
> PrimitiveAnalysisEngine_impl(AnalysisEngineImplBase).process(JCas)
> line: 284
> AnalysisEngine$process.call(Object, Object) line: not available
> ...
> {noformat}
> The IMHO best way would be if UIMA would at try here to use the thread's
> context classloader - and maybe that UIMA actually sets the thread context
> classloader to the resource manager CL while running components... in my
> case, I already do that outside UIMA atm, so searching the thread CL would be
> sufficient for me atm.
> See also: https://issues.apache.org/jira/browse/UIMA-3692
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