Shutdown while pending transactions might cause the service to get stuck

[jusasiiv]

After these steps, service was not handling transactions:

1. Service had 3 pending transactions
2. Service was halted
3. On restart the three pending transactions failed due to error: bad-txns-inputs-missingorspent You might have a local transaction in your wallet that this transaction builds on top. You need to either broadcast or remove the local tx.
4. After clearing the local transactions from the wallet the API failed on queue and would not process tx giving Insufficient funds error
5. Issue was cleared after pending transactions were removed from db and added back in

Possible fix:

• Make sure that on shutdown all local transactions get cleared from the wallet OR on startup make sure not to initiate new transaction for pending transactions