in src/main/scala/org/apache/pekko/persistence/dynamodb/journal/DynamoDBJournal.scala [126:132]
override def asyncReadHighestSequenceNr(persistenceId: String, fromSequenceNr: Long): Future[Long] =
opQueue.get(persistenceId) match {
case null =>
logFailure(s"read-highest-sequence-number($persistenceId)")(readSequenceNr(persistenceId, highest = true))
case f =>
f.flatMap(_ => logFailure(s"read-highest($persistenceId)")(readSequenceNr(persistenceId, highest = true)))
}