WX-843 Workflow failure reason should accurately indicate issues open…

…ing blob filesystem (#6965)

core/src/main/scala/cromwell/core/io/IoCommand.scala

@@ -38,6 +38,12 @@ trait IoCommand[+T] {
 
   def commandDescription: String
 
+  /**
+    * IO commands side-effect and/or have exceptions. We don't want that when evaluating identity, e.g. to check presence in cache.
+    * @return Hash code based on the description, which captures file path & action
+    */
+  override def hashCode(): Int = commandDescription.hashCode
+
   def logIOMsgOverLimit(message: => String): Unit = {
     val millis: Long = java.time.Duration.between(creation, OffsetDateTime.now).toMillis
     if (millis > IoCommand.IOCommandWarnLimit.toMillis) {

core/src/main/scala/cromwell/core/io/IoPromiseProxyActor.scala

@@ -10,6 +10,8 @@ import scala.concurrent.duration.FiniteDuration
 object IoPromiseProxyActor {
   case class IoCommandWithPromise[A](ioCommand: IoCommand[A], timeout: FiniteDuration = defaultTimeout) {
     val promise = Promise[A]()
+
+    override def hashCode(): Int = ioCommand.hashCode()
   }
   def props(ioActor: ActorRef) = Props(new IoPromiseProxyActor(ioActor))
 }