This is JRuby 1.6.7. I was getting a string length error when doing a
require in 1.9 mode. It was pretty weird to track down and I'm not sure how
to replicated it outside of my pretty specific case, but I was hoping you
could
a) help replicate it
b) see if this needs to be fixed
c) give me a workaround pending a newer version
I'm going to be quite detailed, because I'm not sure where the fix should
go, and if there should be a workaround. I'd really love your help, as I
want to use 1.9 mode, but forking the codebase isn't really an option...
the issue is with this function:
protected LoadServiceResource findFileInClasspath(String name)
in LoadService.java
In my case, when it does:
for (int i = 0; i < loadPath.size(); i++) {
and goes through the entries on the loadPath (what is setting the loadPath,
btw? is it the JVM?), it's getting:
RubyString entryString = loadPath.eltInternal(i).convertToString();
However, the file being required is the same as one of the entries...so
when it gets to the following:
if (name.startsWith(entry)) {
name = name.substring(entry.length());
}
name is being set to ''
Thus, when the following is called:
if (name.charAt(0) == '/' || (name.length() > 1 && name.charAt(1) == ':'))
return null;
it's getting an error.
So, for more context (though like I said, this error is pretty specific):
I'm running another project as such:
java -cp pig.jar:/Users/jcoveney/Downloads/jruby-1.6.7/lib/jruby.jar
org.apache.pig.Main -x local
within that project, eventually via reflection a class is instantiated
which has a ScriptingContainer, as such:
protected static final ScriptingContainer rubyEngine;
static {
rubyEngine = new ScriptingContainer(LocalContextScope.SINGLETHREAD,
LocalVariableBehavior.PERSISTENT);
rubyEngine.setCompatVersion(CompatVersion.RUBY1_9);
}
then, eventually, a script is instantiated as such:
rubyEngine.runScriptlet(getScriptAsStream(path), path);
where path is a file called 'pigudf.rb'
the header of this file is:
throw "pigudf.rb only works under JRuby!" unless RUBY_PLATFORM=="java"
require 'jruby'
require 'pig.jar'
org.apache.pig.scripting.jruby.PigJrubyLibrary.new.load(JRuby.runtime,
false)
The issue is with the "require 'pig.jar'" piece. Eventually, it gets to the
point where the name of the resource being requested is pig.jar, but
pig.jar is also on the classpath...so it sets name='', and bag, issue.
I changed the line to:
if (name.length() > 0 && name.charAt(0) == '/' || (name.length() > 1 &&
name.charAt(1) == ':')) return null;
and everything worked perfectly. I don't know JRuby well enough at this
point to know whether or not that would prevent anything from
happening...perhaps in this case, it should attempt to load the jar file,
since it is in fact on the classpath?
Your help is appreciated! Especially how to workaround this (and ideally
any workarounds would be on the backend and not require the user to require
something crazy, but I'll deal with it as it comes)
