[jira] [Created] (GEODE-4748) Geode transaction is not consistent in case of networking problems

["Vadim Lotarev (JIRA)" <ji...@apache.org>]

Vadim Lotarev created GEODE-4748:
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             Summary: Geode transaction is not consistent in case of networking problems
                 Key: GEODE-4748
                 URL: https://issues.apache.org/jira/browse/GEODE-4748
             Project: Geode
          Issue Type: Bug
          Components: transactions
            Reporter: Vadim Lotarev


Geode cache became inconsistent in case if networking problems occur at commit time. How to reproduce:
# create any simple _replicated_ region
# run two nodes
# put some value in the region within a transaction
# execute query on both nodes to check that the same value is returned (I used JMX for that)
# emulate somehow temporary networking error (I changed the code throwing IOException from toData())
# repeat [#3], exception should occur
# repeat [#4] - you should see different values on different nodes

It looks like errors occurred after {{TXState.applyChanges}} produce inconsistency - it is impossible to rollback applied local changes what leads to the state where local cache contains  changed data but other node(s) old data (before changes made in transaction).

To me, consistency is a key property for the systems like Geode so I would consider this bug as a critical one.



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