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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
20 lines
1.3 KiB
Diff
20 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Thu, 11 Aug 2022 14:37:33 +0100
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Subject: [PATCH] Use thread safe random in ServerLoginPacketListenerImpl
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diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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index 79d2bb3170c51e4c83a054eb8d47f894829a94d9..855eac5e6f3a99a2fc31ad0e02c496d4b5c60622 100644
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--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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@@ -52,7 +52,7 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
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private static final AtomicInteger UNIQUE_THREAD_ID = new AtomicInteger(0);
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static final Logger LOGGER = LogUtils.getLogger();
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private static final int MAX_TICKS_BEFORE_LOGIN = 600;
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- private static final RandomSource RANDOM = RandomSource.create();
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+ private static final RandomSource RANDOM = new org.bukkit.craftbukkit.util.RandomSourceWrapper(new java.util.Random()); // Paper - This is called across threads, make safe
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private final byte[] nonce;
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final MinecraftServer server;
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public final Connection connection;
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