Mekanism parallel machine outputs being "missed" on server when crafting interface is in non-blocking mode

[s5bug]

Issue type:

• 🐛 Bug

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Short description:

Crafting recipes that use Mekanism parallel machines usually can take advantage of non-blocking mode to process recipes 9~10x faster. This seems to work in singleplayer, but on multiplayer I find my system to be unable to finish crafts of Mekanism components.

Steps to reproduce the problem:

1. Make a system with a Basic~Ultimate Mekanism machine
2. Add a recipe that chains machines together to produce a final output
3. Make sure all the machines in the chain are hooked up in non-blocking mode (both an item import interface and "eject mode" into the crafting interface produce the issue)
4. Attempt crafting the final recipe

The recipe will get stuck after the first machine as it doesn't realize that the outputs have entered the system.

Expected behaviour:

I expect the craft to complete as the items have been returned to the system. The craft can be "manually" completed by cancelling the job and retrying the exact craft for the depth of the recipe tree.

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Versions:

• This mod:
  • IntegratedDynamics 1.33.3
  • IntegratedCrafting 1.4.6
  • IntegratedTerminals 1.6.28
  • IntegratedTunnels 1.9.4
  • Cyclops Core 1.29.1
• Minecraft: 1.21.1
• Mod loader version: NeoForge 21.1.228
• Other mods:
  • Mekanism 10.7.19
  • IntegratedMekanism 1.0.4

I originally discovered this on an ATM10 server (modified to use the versions+additional mods listed above), but I could not get the problem to simply reproduce in singleplayer, neither in ATM10 nor with the above reduced mod set. I have yet to test on a server with the reduced mod set. I can try replicating my exact system setup in a singleplayer world sometime soon, but I wanted to report this issue before I forgot / fell asleep / etc.

Log file:

[rubensworks]

Thanks for reporting!

[s5bug]

Addendum: the issue also occurs with a non-blocking crafting interface attached to the Mechanical Squeezer for the Menril Logs → Menril Chunks + Resin recipe

[rubensworks]

Addendum: the issue also occurs with a non-blocking crafting interface attached to the Mechanical Squeezer for the Menril Logs → Menril Chunks + Resin recipe

@s5bug Does this happen in singleplayer without any other mods?

[s5bug]

@rubensworks No, I can't get that to replicate in single-player either. I do know it's a problem with Non-Blocking mode for sure now very likely, or at least the chance of the bug occurring greatly increases with Non-Blocking mode, as my long crafts have finished (albeit very slowly) with blocking mode turned on on all my Crafting Interfaces on the ATM10 server.

[s5bug]

If it helps, I can change configs, get logs, use a debug version, etc. on the multiplayer server.

[s5bug]

Hmm, I just had a few recipes get stuck even with blocking mode on, so now I'm not sure what to do. One got stuck waiting for Menril Chunks (from the Mechanical Squeezer) and the other got stuck waiting for Copper Dust (from a Mekanism Ultimate Enriching Factory). The items did end up in the system though, so it just missed that the items were returned; I could complete the crafts by cancelling the auto-crafting and restarting the exact same job.

I believe the jobs in question were 20 Energy Importers and 20 Mekanism Wind Generators respectively.

The storage system does have quite high traffic (there's a lot of automated inputs going in from farms and lasers and such) but nothing that overlaps with the recipe outputs and there's no automatic exports either.

[s5bug]

Breaking and re-placing the crafting interfaces seems to fix the machines currently. I'll do more testing to see if I can figure out anything further. I know specifically we updated the version of ID in ATM10 because I was previously hitting the bug that was fixed in 1.33.2.

[s5bug]

It seems that I can at least temporarily fix the machines by doing the following:

• Disconnecting the line with all the crafting interfaces on it
• Breaking and re-placing the crafting interfaces on the machines
• Re-connecting the line with all the crafting interfaces on it

And this also seems to make non-blocking mode work with a higher probability, although machines still get into a "corrupted"(?) state eventually after enough use.