[jboss-user] [JBoss Cache: Core Edition] - Re: Pessimistic Locking

[bstansberry@jboss.com]

"nathanmesser" wrote : 
  | I have a transaction T1, which reads a node A from the cache, so it should have a read lock on the node.
  | 
  | This transaction is then suspended, when an EJB method is called with it's transaction attribute set to requiresNew. This transaction T2 then writes to the node. 
  | 
  | Transaction T2 then commits, and transaction T1 continues, and commits as well.
  | 
  | I'm using Pessimistic Locking with an Isolation Level of READ_COMMITTED
  | 
  | Why does T1s read lock not block T2s obtaining of the write lock?

The semantic you described sounds like REPEATABLE_READ to me, not READ_COMMITTED.

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