mirror of https://github.com/PaperMC/Paper.git
78 lines
4.6 KiB
Diff
78 lines
4.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sun, 8 Aug 2021 16:26:46 -0700
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Subject: [PATCH] Do not submit profile lookups to worldgen threads
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They block. On network I/O.
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If enough tasks are submitted the server will eventually stall
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out due to a sync load, as the worldgen threads will be
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stalling on profile lookups.
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diff --git a/src/main/java/net/minecraft/Util.java b/src/main/java/net/minecraft/Util.java
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index 9870eccc1dc5c2201f12f8e2affe647f6b0375f8..30237ca94a36197ce21369bdcc7bb1dfafe02680 100644
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--- a/src/main/java/net/minecraft/Util.java
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+++ b/src/main/java/net/minecraft/Util.java
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@@ -82,6 +82,22 @@ public class Util {
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private static final String MAX_THREADS_SYSTEM_PROPERTY = "max.bg.threads";
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private static final AtomicInteger WORKER_COUNT = new AtomicInteger(1);
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private static final ExecutorService BACKGROUND_EXECUTOR = makeExecutor("Main");
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+ // Paper start - don't submit BLOCKING PROFILE LOOKUPS to the world gen thread
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+ public static final ExecutorService PROFILE_EXECUTOR = Executors.newFixedThreadPool(2, new java.util.concurrent.ThreadFactory() {
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+
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+ private final AtomicInteger count = new AtomicInteger();
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+
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+ @Override
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+ public Thread newThread(Runnable run) {
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+ Thread ret = new Thread(run);
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+ ret.setName("Profile Lookup Executor #" + this.count.getAndIncrement());
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+ ret.setUncaughtExceptionHandler((Thread thread, Throwable throwable) -> {
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+ LOGGER.error("Uncaught exception in thread " + thread.getName(), throwable);
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+ });
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+ return ret;
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+ }
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+ });
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+ // Paper end - don't submit BLOCKING PROFILE LOOKUPS to the world gen thread
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private static final ExecutorService IO_POOL = makeIoExecutor();
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private static final DateTimeFormatter FILENAME_DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss", Locale.ROOT);
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public static final long NANOS_PER_MILLI = 1000000L;
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diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
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index 82f6404e5c4c5b2c9aea1b1c27ebee1d3c7ee9dc..c70cd016e1978931d115cfca94664897f0158196 100644
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--- a/src/main/java/net/minecraft/server/players/GameProfileCache.java
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+++ b/src/main/java/net/minecraft/server/players/GameProfileCache.java
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@@ -167,7 +167,7 @@ public class GameProfileCache {
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} else {
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CompletableFuture<Optional<GameProfile>> completablefuture1 = CompletableFuture.supplyAsync(() -> {
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return this.get(username);
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- }, Util.backgroundExecutor()).whenCompleteAsync((optional, throwable) -> {
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+ }, Util.PROFILE_EXECUTOR).whenCompleteAsync((optional, throwable) -> { // Paper - not a good idea to use BLOCKING OPERATIONS on the worldgen executor
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this.requests.remove(username);
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}, this.executor);
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diff --git a/src/main/java/net/minecraft/world/level/block/entity/SkullBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/SkullBlockEntity.java
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index cf7e64eac9e3eb395a0be0a2a4fa0175a731b6e7..f5162f7171c348ff523b18e577246561d79e1c20 100644
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--- a/src/main/java/net/minecraft/world/level/block/entity/SkullBlockEntity.java
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+++ b/src/main/java/net/minecraft/world/level/block/entity/SkullBlockEntity.java
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@@ -222,7 +222,7 @@ public class SkullBlockEntity extends BlockEntity {
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} else {
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return Optional.empty();
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}
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- }, Util.backgroundExecutor());
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+ }, Util.PROFILE_EXECUTOR); // Paper - not a good idea to use BLOCKING OPERATIONS on the worldgen executor
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}
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private static boolean hasTextures(GameProfile profile) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/profile/CraftPlayerProfile.java b/src/main/java/org/bukkit/craftbukkit/profile/CraftPlayerProfile.java
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index eef39c0323c57cbe33cee4cd38ad9f48654df2a9..9eafa36b086ed4cde107b81aa9470d1a43e557f1 100644
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--- a/src/main/java/org/bukkit/craftbukkit/profile/CraftPlayerProfile.java
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+++ b/src/main/java/org/bukkit/craftbukkit/profile/CraftPlayerProfile.java
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@@ -125,7 +125,7 @@ public final class CraftPlayerProfile implements PlayerProfile {
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@Override
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public CompletableFuture<PlayerProfile> update() {
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- return CompletableFuture.supplyAsync(this::getUpdatedProfile, Util.backgroundExecutor());
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+ return CompletableFuture.supplyAsync(this::getUpdatedProfile, Util.PROFILE_EXECUTOR); // Paper - not a good idea to use BLOCKING OPERATIONS on the worldgen executor
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}
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private CraftPlayerProfile getUpdatedProfile() {
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