[infinispan-dev] SingleJoinTest#testTransactional failure

[Manik Surtani]

I wrote the original test, to simulate a transactional write occuring (still in prepare phase) while a node joins.  So to this end, I think we can safely run the test without L1 caching as the behaviour we are trying to test is still correct.

However I'm puzzled that the L1 invalidation kills this - the L1 invalidation should be a fail-fast mechanism.

On 19 Nov 2010, at 17:20, Vladimir Blagojevic wrote:

> Hi,
> 
> SingleJoinTest transactional variant currently fails. But it is destined 
> to fail as is! Let me explain. We have four nodes {A,B,C,D} and another 
> node E joins. Just before E joins a tx T is started on one of the 
> existing nodes with a write to key K. There is essentially a latch in 
> the prepare of T that is opened only after E succefully joins upon join 
> rehash. As part of join rehash E needs to invalidate invalid L1 keys and 
> during that process it tries to lock ..you guessed it key K. Since T 
> holds a lock on K already eventually E join rehash task times out and as 
> a result we get a failed test.
> 
> 
> I did not write this test and I would not like to change the original 
> writer's test case intent. What are our options?
> 
> Cheers,
> Vladimir
> 
> 
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--
Manik Surtani
manik at jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
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