Observers registered on NodeVaultService#rawUpdates, if they throw an exception when called from serviceHub#recordTransactions and if this exception is not handled by the flow hospital, then this leads to the transaction not being recorded in the local vault. This could get the ledger in an out of sync state.
In the specific case this happens within FinalityFlow#notariseAndRecord this leads to the transaction being notarized but not recorded in the local vault nor broadcasted in any counter party. The -failed to be recorded locally- transaction and its output states are not visible to any vault, and its input states not able to consumed by a new transaction, since they are recorded as consumed within the Notary. In this specific case we need not loose, by any means, the current transaction.
We will handle all cases by catching all exceptions thrown from serviceHub#recordTransactions, wrapping them with a HospitalizeFlowException and throwing it instead. The flow will get to the hospital for observation to be retried from previous checkpoint on next node restart.
* Unwrap rx.OnErrorNotImplementedException so the hospital can handle the cause appropriately
* Add db failure cordapp
* Renamed folders to avoid ambiguity in gradle
* Add integration test for exception hospitalisation when thrown from an RX observable.
* Make the test slightly cleaner
* Fix the schema to actually match the requirements for my custom state. Thanks a bunch, H2.
* Switch test to use SqlException base class.
* Schedule error event if we detect that a commit or db flush has thrown (forcing the flow to error even if customer code then goes ahead to swallow the exception)
* Revert change to schedule extra error
* Add more tests for edge case with DB exceptions, changed CorDapp to suppor this an hook in the flow hospital
* Warning about unsubscribe
Check state transitioned from clean to error for hospital admission.
* Match the test to our actual expectations
* Revert "Revert change to schedule extra error"
This reverts commit 43d47937
* Prevent suppression of errors arising in `transaction()` and `jdbcConnection()`
* Test for SqlException caught trying to escape from recordTransaction and suppressed outside being intercepted.
* More tests for various error/catch combinations
* Clean up and comments
* Code reformat
* Fix test compilation
