-Re: Make zookeeper more test friendly
Ted Dunning 2013-06-28, 05:38
+1 this is a very big deal
On Thu, Jun 27, 2013 at 6:39 PM, Thawan Kooburat <[EMAIL PROTECTED]> wrote:
> Many recent issues that I saw internally is due to incorrect handling or
> no sufficient testing on ZooKeeper failure scenario in the custom wrapper
> API or in the applications.
> I am thinking that we might be able to expose a few more API calls that
> allow user write unit tests that cover various failure scenarios (similar
> to the TestableZookeer in zookeeper test) . This should also minimize the
> effort on setting the test framework. Ideally, if we have a mock client
> that don't need a running the server that would be ideal, but I think it is
> too much effort to write and maintain for all the languages. Our internal
> test facility is that we have a dedicated ensemble used by all unit tests.
> This ensure application logic correctness but it is hard to test various
> failure scenarios.
> So my current thought is to expose the following functionalities.
> 1. zookeeper_close() that don't actually send close request to the
> server: This can be used to simulate a client crash without actually
> crashing the test program.
> 2. Allow client to force triggering CONNECTION_LOSS or SESSSION_EXPIRE
> event: This will allow the user to test their watchers and callback (and
> possible race condition)
> Let me know if you have additional suggestions.
> Thawan Kooburat