Re: [infinispan-dev] SysAdmin operations for recovering transactions

Hi, It's about the stage where TM's recovery process finds a in-doubt transaction and notifies the sys admin about it: what hooks does ISPN provide to the sys admin in order to "fix" the tx. E.g. step >= 3.3 : http://community.jboss.org/servlet/JiveServlet/showImage/102-16552-14-118... Here is what I have in mind: Expose (JMX) two operations: //all the params together fully describe a xid. replayTx(byte[] txBranch, byte[] txId, int formatId); forceRollbackTx(byte[] txBranch, byte[] txId, int formatId);

Here is how these two ops would work: A. replayTx 1. the node has locally the PrepareCommand associated with that XID - re-issues a prepare: TransactionXAResource.prepare - if successful re-issues a commit: TransactionXAResource.commit -if failure happens at any step the user is informed and she/he can re-do the JMX call - if success the recovery information is removed from the cluster (async) 2. the node doesn't have the PrepareCommand associated with that XID - broadcast ReplayTxCommand (Xid) - when a node receives ReplayTxCommand - if doesn't have a PreparedCommand associated with the Xid ignores it - if has a PreparedCommand... - is it the first in the view that has it [1]?

- yes. Execute A.1then returns result to node that broadcasted ReplayTxCommand. This is guaranteed to happen on at most[2] one node in the cluster - no. Ignores it. - if success the recovery information is removed from the cluster (async) B.rollbackTx - node broadcasts RollbackCommand - each node that has the PrepareCommand forces a rollback - each node that doesn't have the PreparedCommand ignores it - if success the recovery information is removed from the cluster (async) Cheers, Mircea [1] this is determined by building the set of nodes on which tx spreads, based on tx's state. Then determine the first in the view. [2] it is possible not to happen on any node as the PrepareCommand might had been removed from all nodes in between (node failures, expiration from the recovery cache). _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev