RE: [Webware-discuss] Concurrency issue with import WAS: TaskKit problem

[Geoffrey T. <gta...@na...>]

Jason Hildebrand [mailto:ja...@pe...] wrote:
<snip>
> Note: I need to tweak the Webware source to check for the lock and use
> it if available.  We can do this already, so that the code will take
> advantage of the lock when running on newer Python versions.

Would it also help for current versions of Python to use our own import lock
around __import__ if the Python import lock isn't available?

A workaround might be to pre-import your servlets using explicit import
statements in your context's __init__.py.  I think the __init__.py gets
imported before it fires up the thread pool, so there would be no risk of
concurrent imports.

In my testing, I often have multiple simultaneous requests come in for the
same servlet immediately after restarting the appserver, but I've never
encountered a problem with simultaneous imports.  I suppose whether or not
it's a problem depends on what the side effects of the imports are.

- Geoff