Paper/Spigot-Server-Patches/0383-Handle-bad-chunks-more-gracefully.patch
Spottedleaf 5c7081fecc Update upstream & fix some chunk related issues (#2177)
* Updated Upstream (Bukkit/CraftBukkit)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
45690fe9 SPIGOT-5047: Correct slot types for 1.14 inventories

CraftBukkit Changes:
4090d01f SPIGOT-5047: Correct slot types for 1.14 inventories
e8c08362 SPIGOT-5046: World#getLoadedChunks returning inaccessible cached chunks.
d445af3b SPIGOT-5067: Add item meta for 1.14 spawn eggs

* Bring Chunk load checks in-line with spigot

As of the last upstream merge spigot now checks ticket level status
when returning loaded chunks for a world from api. Now our checks
will respect that decision.

* Fix spawn ticket levels

Vanilla would keep the inner chunks of spawn available for ticking,
however my changes made all chunks non-ticking. Resolve by changing
ticket levels for spawn chunks inside the border to respect this
behavior.


* Make World#getChunkIfLoadedImmediately return only entity ticking chunks

Mojang appears to be using chunks with level > 33 (non-ticking chunks)
as cached chunks and not actually loaded chunks.

* Bring all loaded checks in line with spigot

Loaded chunks must be at least border  chunks, or level <= 33
2019-06-14 03:27:40 +01:00

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Diff

From f466694c87deb057b8f216e15ef9ea38f01de9a2 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Mon, 15 Apr 2019 02:24:52 +0100
Subject: [PATCH] Handle bad chunks more gracefully
Prior to this change the server would crash when attempting to load a
chunk from a region with bad data.
After this change the server will defer back to vanilla behavior. At
this time, that means attempting to generate a chunk in its place
(and occasionally just not generating anything and leaving small
holes in the world (This statement might not be accurate as of 1.13.x)).
Should Mojang choose to alter this behavior in the future, this change
will simply defer to whatever that new behavior is.
diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index c53518a477..6f34d8aea0 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -171,8 +171,21 @@ public abstract class RegionFileCache implements AutoCloseable {
private static NBTTagCompound readOversizedChunk(RegionFile regionfile, ChunkCoordIntPair chunkCoordinate) throws IOException {
synchronized (regionfile) {
try (DataInputStream datainputstream = regionfile.getReadStream(chunkCoordinate)) {
- NBTTagCompound oversizedData = regionfile.getOversizedData(chunkCoordinate.x, chunkCoordinate.z);
- NBTTagCompound chunk = NBTCompressedStreamTools.readNBT(datainputstream);
+ // Paper start - Handle bad chunks more gracefully - also handle similarly with oversized data
+ NBTTagCompound oversizedData = null;
+
+ try {
+ oversizedData = regionfile.getOversizedData(chunkCoordinate.x, chunkCoordinate.z);
+ } catch (Exception ex) {}
+
+ NBTTagCompound chunk;
+
+ try {
+ chunk = NBTCompressedStreamTools.readNBT(datainputstream);
+ } catch (final Exception ex) {
+ return null;
+ }
+ // Paper end
if (oversizedData == null) {
return chunk;
}
@@ -231,8 +244,13 @@ public abstract class RegionFileCache implements AutoCloseable {
try {
if (datainputstream != null) {
- nbttagcompound = NBTCompressedStreamTools.a(datainputstream);
- return nbttagcompound;
+ // Paper start - Handle bad chunks more gracefully
+ try {
+ return NBTCompressedStreamTools.a(datainputstream);
+ } catch (Exception ex) {
+ return null;
+ }
+ // Paper end
}
nbttagcompound = null;
--
2.21.0