Andrew Mashenkov created IGNITE-11559:
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             Summary: MVCC: Tx hangs on finish if StorageException occurs.
                 Key: IGNITE-11559
                 URL: https://issues.apache.org/jira/browse/IGNITE-11559
             Project: Ignite
          Issue Type: Bug
          Components: mvcc, persistence
            Reporter: Andrew Mashenkov


By default non-mvcc transactions don't log their states in WAL log, so tx 
rollbacks without hanging as there is nothing to save to WAL or PageMemory.
So, it may be helpful to check case for non-mvcc tx with txState WAL-logging 
enabled at first.

When StorageException occurs during any mvcc tx operation enabled, then storage 
locks become blocked. Then Ignite try to rollback Tx due to the error and try 
to save txState into WAL and TxLog and hangs forever. A thread hangs awaiting 
uninterruptibly for next WAL segment or lock released.

Failure handler tries to stop a node and hangs as well.

Looks like we shouldn't wait if kernal context become invalid.

Good startpoint is IgniteWalFlush* tests.



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