java.lang.IllegalStateException: Was expecting to find transaction set on current strand

问题

In Corda, I am running flow tests using a MockNetwork. I am trying to retrieve a transaction from one of the nodes' transaction storage using:

node.services.validatedTransactions.getTransaction(signedTx.id)

However, this is throwing the following exception:

com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalStateException: Was expecting to find transaction set on current strand: Thread[main,5,main]

What is the cause of this error?

回答1:

Whenever you need to access a MockNode's database, you need to do so inside a database transaction:

node.transaction {
    node.services.validatedTransactions.getTransaction(signedTx.id)
}

来源：https://stackoverflow.com/questions/53279358/java-lang-illegalstateexception-was-expecting-to-find-transaction-set-on-curren