BUG#15425 Small window for NF during backup failing without error

ndb/src/kernel/blocks/backup/Backup.cpp

@@ -786,13 +786,17 @@ Backup::checkNodeFail(Signal* signal,
       pos= &ref->nodeId - signal->getDataPtr();
       break;
     }
+    case GSN_WAIT_GCP_REQ:
+    case GSN_DROP_TRIG_REQ:
     case GSN_CREATE_TRIG_REQ:
     case GSN_ALTER_TRIG_REQ:
-    case GSN_WAIT_GCP_REQ:
+      ptr.p->setErrorCode(AbortBackupOrd::BackupFailureDueToNodeFail);
+      return;
     case GSN_UTIL_SEQUENCE_REQ:
     case GSN_UTIL_LOCK_REQ:
-    case GSN_DROP_TRIG_REQ:
       return;
+    default:
+      ndbrequire(false);
     }
     
     for(Uint32 i = 0; (i = mask.find(i+1)) != NdbNodeBitmask::NotFound; )
@@ -1880,7 +1884,7 @@ Backup::execBACKUP_FRAGMENT_REF(Signal* signal)
       }
     }
   }
-  ndbrequire(false);
+  goto err;
 
 done:
   ptr.p->masterData.sendCounter--;
@@ -1893,6 +1897,7 @@ done:
     return;
   }//if
 
+err:
   AbortBackupOrd *ord = (AbortBackupOrd*)signal->getDataPtrSend();
   ord->backupId = ptr.p->backupId;
   ord->backupPtr = ptr.i;

ndb/src/kernel/blocks/dbdict/Dbdict.cpp

@@ -11694,7 +11694,6 @@ Dbdict::alterTrigger_toDropLocal(Signal* signal, OpAlterTriggerPtr opPtr)
     // broken trigger allowed if force
     if (! (triggerPtr.p->triggerLocal & TriggerRecord::TL_CREATED_LQH)) {
       jam();
-      ndbrequire(opPtr.p->m_requestFlag & RequestFlag::RF_FORCE);
       alterTrigger_sendReply(signal, opPtr, false);
       return;
     }