[infinispan-dev] Versioned Transactional Cache issues

Pedro Ruivo pruivo at gsd.inesc-id.pt
Tue Sep 11 14:14:16 EDT 2012

Hi all,

While I was working in Infinispan, I have found some issues with the 
versioned transactional cache. I have created some tests cases (can be 
found here [1]) to reproduce the issues and also I have fixed one of 
them. The issues are the following:

1) testPutIfAbsent, testRemoveIfPresent, testReplaceWithOldVal (methods 
the test cases)

In this tests, it was updating the cache entry with a null version. This 
originates later a IllegalStateException when it tries to perform the 
write skew check and the version is null.
I have fixed this problem in this way: if the command fails (PutCommand, 
RemoveCommand, ReplaceCommand), I unset the flag CHANGED in the 
MvccEntry to avoid to update the entry in the DataContainer.

2) testClear in distributed mode

I have no clear idea how to solve this problem but it looks like the 
PrepareCommand (with the ClearCommand) is not sent to all the nodes in 
the cluster. Then, when I do a get, a remote get is performed and the 
key is still there. I think that it is not the desired behavior.

3) testRemoveUnexistingEntry

In this test, it tries to remove a key that does not exists but it does 
not success due to a NullPointerException. I have looked deeper and I 
check that the transaction's lookup entries map has an entry with [key 
=> null] and when it tries to perform the write skew check in that key, 
a NullPointerException is thrown in here [2] (line 80, WriteSkewHelper)

Should I open a JIRA with this 3 issues (or 3 JIRAs, one for each issue)?
If you want, I can issue a pull request too.

Pedro Ruivo

[1] https://github.com/pruivo/infinispan/tree/t_replace_fix

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