I added a transaction timeout of 10000 millis and a transation size of 100 (transaction is Optimistic and Serializable)...
I see no TransactionTimeoutExceptions, just the following: CacheException: class org.apache.ignite.IgniteInterruptedException: Got interrupted while waiting for future to complete.. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/