ThreadLocal caches for regexp in RubyString and joni cause classloader leaks in
app servers
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Key: JRUBY-1941
URL: http://jira.codehaus.org/browse/JRUBY-1941
Project: JRuby
Issue Type: Bug
Reporter: Charles Oliver Nutter
Assignee: Marcin Mielzynski
Priority: Blocker
Fix For: JRuby 1.1
There are at least two caches, one in RubyString and one in Joni, that are
static and thread-local. This causes the following problem:
* Threads from the app server thread pool come in and are adopted.
* The caches get associated with those threads
* The contents of the caches reference either Ruby objects (which reference the
Ruby runtime) or reference objects of types loaded within the webapp
classloader chain (directly leading to the webapp classloader itself)
* Because the pooled threads stay alive and directly reference objects that
reference the runtime or classloader, everything leaks.
We must eliminate these hard references from long-lived threads to objects and
classes that live only in the webapp.
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