The miner can't find the mine

[Dinotanker]

Is there an existing issue for this?

• I have searched the existing issues.

Are you using the latest MineColonies Version?

• I am running the latest beta/release version of MineColonies for my Minecraft version.
  I am also running the latest versions of other mods that are part of my problem.

Did you check on the Wiki? or ask on Discord?

• I checked the MineColonies Wiki and made sure my issue is not covered there. Or I was sent from discord to open an issue here.

What were you playing at the time? Were you able to reproduce it in both settings?

• Single Player
• Multi Player

Minecraft Version

1.20

MineColonies Version

1.20.1-1.1.1195

Structurize Version

1,20.1-1.0.804

Related Mods and their Versions

No response

Current Behavior

Expected Behavior

Starting at 16:17:24 and repeating with increasing pause time (100, 200, 400, 800, 1600 seconds), the same error occurs for citizen Bentlee U. Colmer (miner):

text
java.lang.NullPointerException: Cannot invoke "com.minecolonies.core.entity.ai.workers.util.MineNode.getParent()" because the return value of "com.minecolonies.core.colony.buildings.modules.MinerLevelManagementModule.getActiveNode()" is null
What does it mean:

The miner is trying to do his job (the mine).

To do this, he needs to know which node (MineNode) in the mine he should be developing now.

It requests this node from the mine management module (MinerLevelManagementModule).

The module returns null (that is, "there is no node").

The miner, having not received the node, tries to call the method.getParent() is null for this, which causes the error (NullPointerException).

Reproduction Steps

1. Set up a mine 2. Give the miner a task to dig a certain level 3. The miner issues this error

Logs

<script src="https://gist.github.com/Dinotanker/bac30a13c38001438919c726d400b906.js"></script>

Anything else?

No response

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[Dinotanker]

My friend had such an error, I can't say for the complete reproduction of the error. Here's what deepseek writes about this log

1. Main problem: NullPointerException in miner
   Starting at 16:17:24 and repeating with increasing pause time (100, 200, 400, 800, 1600 seconds), the same error occurs for citizen Bentlee U. Colmer (miner):

text
java.lang.NullPointerException: Cannot invoke "com.minecolonies.core.entity.ai.workers.util.MineNode.getParent()" because the return value of "com.minecolonies.core.colony.buildings.modules.MinerLevelManagementModule.getActiveNode()" is null
What does it mean:

The miner is trying to do his job (the mine).

To do this, he needs to know which node (MineNode) in the mine he should be developing now.

It requests this node from the mine management module (MinerLevelManagementModule).

The module returns null (that is, "there is no node").

The miner, having not received the node, tries to call the method.getParent() is null for this, which causes the error (NullPointerException).

The MineColonies system is trying to deal with this error. She "pauses" this particular miner to prevent the game from crashing. The pause time increases each time: 100, 200, 400, 800, 1600 seconds.

AI history for citizen error shows that a miner is stuck in an endless loop:
MINER_MINING_NODE -> LOAD_STRUCTURE -> BUILDING_STEP -> COMPLETE_BUILD -> IDLE -> START_WORKING -> PREPARING -> MINER_CHECK_MINESHAFT -> MINER_MINING_NODE -> ... (and so on until an error occurs).

Every time he gets to the MINER_MINING_NODE step, he can't find it, an error occurs, and the cycle starts over after a pause.

3. Possible cause: A problem with the shaft structure
   This error often occurs when data about a mine in a colony is corrupted. Possible reasons:

Damage to the save file: Data about the mine (its level, location of nodes) could have been corrupted.

The mine was destroyed or unfinished: It is possible that the mine building was damaged or its construction was interrupted in an abnormal way, which is why the mine management module (MinerLevelManagementModule) is in an incorrect state (there is no active node for development).

Fashion Bugs: This may be an error in the miner's logic in the version of MineColonies being used.

4. Related issues
   Problems with requests: There are other MineColonies errors in the log, for example:
   Packet error: java.lang.IllegalArgumentException: The given token is not registered as a request to this manager.
   This indicates out-of-sync or problems in the colony's requests system, which may be either a consequence of the underlying problem or a separate bug.

[someaddons]

we need to see the full error log

[Talyda]

You're using minecolonies tweaks and compatibility (copy pasting below from discord)

Unfortunately some addons modify Minecolonies in a reckless way, causing both stability and performance issues. Due to this, we cannot give support when something does not seem to work correctly when those mods are installed.
Please try to reproduce it without those mods installed (make a backup of the world first!)
This applies especially to the following addons:
Tweaks addon for MineColonies
Compatibility addon for MineColonies
Easycolony addon for Minecolonies
Pathfinding Edition for Minecolonies
Minecolonies Quality Of Life
MindOfTheColony
MineColonies: Transit Networks
We advise users and packmakers to remove these mods from their packs as the addon authors do not seem to be willing to do their changes in a responsible way, therefore harming our ecosystem.
Note that removing those mods may interfere with the request system, which could cause crashes. This can be solved with /mc colony requestsystem-reset-all

Alongside these, (Bukkit) plugins and (Forge) mods are not compatible with each other, because of the way the plugin loaders (Spigot, Paper, etc.) and Forge both need to modify the minecraft code.
For this reason, any sort of compatibility project (Mohist, Magma, Sponge, etc.) is not supported.