[ http://jira.jboss.com/jira/browse/JBCACHE-94?page=history ]
Bela Ban resolved JBCACHE-94:
-----------------------------
Resolution: Done
Involved changing synchronization of put() and evict()/remove() methods in
CreateIfNotExistsInterceptor
> Incorrect synchronization between threads (CreateIfNotExistsInterceptor and
> LockInterceptor)
> --------------------------------------------------------------------------------------------
>
> Key: JBCACHE-94
> URL: http://jira.jboss.com/jira/browse/JBCACHE-94
> Project: JBoss Cache
> Type: Bug
> Reporter: Bela Ban
> Assignee: Bela Ban
> Priority: Blocker
> Fix For: 1.2.1
>
>
> Example (assumes RPE-READ (R/W lock) semantics):
> - TX1 does a put(/a/b/c)
> - TX1 acquires lock1 in CreateIfNotExistsInterceptor
> - TX1 creates /a/b (RL) and /a/b/c (WL), locking those nodes
> - TX2 does a put(/a/b/c/d), waits on CINE-Int
> - TX1 releases lock1
> - TX2 acquires lock1 and blocks on lock acquisition for /a/b/c (WL-ed by TX1)
> - TX1 does a remove(/a/b/c, key)
> - TX1 blocks on lock1 (held by TX2)
> - TX2 times out, rolls back changes and releases lock1
> - TX1 acquires lock1, makes the change, commits TX and releases all locks
> SOLUTION: we need to fine-grained synchronization in
> CreateIfNotExistsInterceptor
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