Cannot Catch Core Java Exceptions From JRuby Internals in Ruby Code
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Key: JRUBY-2429
URL: http://jira.codehaus.org/browse/JRUBY-2429
Project: JRuby
Issue Type: Bug
Components: Interpreter
Affects Versions: JRuby 1.1
Environment: Java 6/Windows XP
Reporter: Peter K Chan
If a core Java exceptions, such as NullPointerException, ClassCastException, or
ArrayIndexOufOfBoundsException, is thrown from within a JRuby internal code,
the exception cannot be caught by any Ruby handler. This includes both
exception coming from JRuby interpreter and any other JRuby-optimized Java code
(such as AR-JDBC's own Internal adapter).
This is a bug and not merely a feature request, because the inability to catch
such core Java exception makes it impossible to guard the thread against any
unexpected exception, and directly kills the thread.
I don't have a test case, because I don't know how to intentionally trigger an
exception inside JRuby (any such exception will presumably be a bug).
To fix this bug, these core exception should be rescue-able by Ruby code and
also have Ruby stack traces available.
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