Unreal Engine Issues
Unreal Engine Issues
Check in SetNetPushIdDynamic fails when deriving object from class with no replicated properties
UE - Networking - Jun 5, 2023UHT will only emit the REPLICATED_BASE_CLASS macro and set the NeedsPushModelHeaders flag when the class has replicated properties. If a base class doesn't have any replicated properties, it will le ...
Objects without custom delta properties can return false for CanSkipUpdate with net.PushModelSkipUndirtiedReplication enabled
UE - Networking - Jun 5, 2023This seems to occur after receiving a Nak for certain actors. FObjectReplicator::ReceivedNak will decrement SendingRepState.CustomDeltaChangeIndex even if the object has no custom delta properties. ...
Dormancy validation log warnings when COND_Never property changes
UE - Networking - Jun 2, 2023FRepLayout::DiffProperties doesn't check if the property's conditions is COND_Never or if the Parent Cmd's flags have the ERepParentFlags::IsLifetime flag (which FRepLayout::InitFromClass doesn't se ...
Static, non-replicated actors have different role to dynamically spawned actors
UE - Networking - May 23, 2023For a non-replicated actor, the expected values for its local and remote roles would be ROLE_Authority and ROLE_None respectively. However, in ULevel::InitializeNetworkActors, ExchangeNetRoles(true) ...
Destroying a beacon from a RPC no longer destroys the beacon actor
UE - Networking - May 16, 2023This seems to be because of recent changes made for [Link Removed]. Now that UNetDriver::bInTick is being properly tracked for derived classes, AOnlineBeacon::CleanupNetDriver is now deferring destr ...
Replicated subobjects list crashes with unreachable yet valid objects when UE_NET_SUBOBJECTLIST_WEAKPTR=0
UE - Networking - May 8, 2023This seems to occur when the subobject is considered unreachable but is not yet pending kill/marked as garbage. In this case, IsValid returns true while FWeakObjectPtr::Get returns nullptr for the o ...
Dropped encryption ack control message can result in connection failure
UE - Networking - Apr 28, 2023When connecting a client using encryption, the server's NetConnection sends the encryption ack and then immediately enables encryption (UNetConnection::EnableEncryptionServer). In the case where the ...
RPCs can still be called on torn off actors
UE - Networking - Apr 25, 2023Because UNetDriver::ProcessRemoteFunction does not check if the actor has been torn off, it's possible for the server to send a RPC for a torn off actor if it still exists on the server and client. ...
Old property values can be applied when updating an unmapped reference in custom NetSerialize struct
UE - Networking - Apr 13, 2023This seems to be caused by the following:The struct, which has an actor reference property as well as some other properties, implements its own NetSerialize function.When the actor reference propert ...
ServerMapNameOverride applied to "Play Standalone" NetMode instances
UE - Networking - Mar 9, 2023For testing connection flow, it can be really useful to have the ability to start standalone instances in one map while the server starts in another. However, since the server map name override is a ...