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Fix memory leak in TickListServer (#3068)
Only occurred when entries were scheduled with huge tick delays Add two flags to debug excessive tick delays: -Dpaper.ticklist-warn-on-excessive-delay=true (false by default) and -Dpaper.ticklist-excessive-delay-threshold=ticks which sets the excessive tick delay to the specified ticks (defaults to 60 * 20 ticks, aka 60 seconds)
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Spottedleaf
GitHub
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68ec946c7a
1 changed files with 35 additions and 14 deletions
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@ -1,4 +1,4 @@
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From cfd5fdb1c2d74d13459f23ff6cdf593cd1e293c9 Mon Sep 17 00:00:00 2001
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From ba1ce65d933700f100d6156e3b8c1c617f8de19d Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Fri, 14 Feb 2020 01:24:39 -0800
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Subject: [PATCH] Optimise TickListServer by rewriting it
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@ -35,12 +35,18 @@ Long scheduled is handled the same as TickListServer.
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into a map of entries for that chunk. Once the chunk is moved
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to ticking, the items are re-scheduled.
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This patch has also added two flags to debug excessive tick delays:
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-Dpaper.ticklist-warn-on-excessive-delay=true (false by default)
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and -Dpaper.ticklist-excessive-delay-threshold=ticks which
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sets the excessive tick delay to the specified ticks (defaults to
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60 * 20 ticks, aka 60 seconds)
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diff --git a/src/main/java/com/destroystokyo/paper/server/ticklist/PaperTickList.java b/src/main/java/com/destroystokyo/paper/server/ticklist/PaperTickList.java
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new file mode 100644
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index 000000000..666f49fe9
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index 0000000000..e948012d5b
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/server/ticklist/PaperTickList.java
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@@ -0,0 +1,602 @@
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@@ -0,0 +1,617 @@
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+package com.destroystokyo.paper.server.ticklist;
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+
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+import net.minecraft.server.MCUtil;
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@ -84,7 +90,7 @@ index 000000000..666f49fe9
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+ public static final int STATE_TICKED = 1 << 4; // after this, it gets thrown back to unscheduled
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+ public static final int STATE_CANCELLED_TICK = 1 << 5; // still gets moved to unscheduled after tick
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+
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+ private static final int SHORT_SCHEDULE_TICK_THRESHOLD = 20 * 5 + 1; // 5 seconds
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+ private static final int SHORT_SCHEDULE_TICK_THRESHOLD = 20 * 20 + 1; // 20 seconds
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+
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+ private final WorldServer world;
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+ private final Predicate<T> excludeFromScheduling;
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@ -117,6 +123,9 @@ index 000000000..666f49fe9
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+
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+ private long nextTick;
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+
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+ private static final boolean WARN_ON_EXCESSIVE_DELAY = Boolean.getBoolean("paper.ticklist-warn-on-excessive-delay");
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+ private static final long EXCESSIVE_DELAY_THRESHOLD = Long.getLong("paper.ticklist-excessive-delay-threshold", 60 * 20).longValue(); // 1 min dfl
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+
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+ // assume index < length
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+ private static int getWrappedIndex(final int start, final int length, final int index) {
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+ final int next = start + index;
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@ -221,6 +230,11 @@ index 000000000..666f49fe9
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+ this.pendingChunkTickLoad.remove(chunkKey);
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+ }
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+ }
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+
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+ long delay = entry.getTargetTick() - this.nextTick;
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+ if (delay >= SHORT_SCHEDULE_TICK_THRESHOLD) {
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+ this.longScheduled.remove(entry);
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+ }
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+ }
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+
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+ public void onChunkSetTicking(final int chunkX, final int chunkZ) {
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@ -449,6 +463,13 @@ index 000000000..666f49fe9
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+ return;
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+ }
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+
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+ if (WARN_ON_EXCESSIVE_DELAY) {
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+ final long delay = entry.getTargetTick() - this.nextTick;
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+ if (delay >= EXCESSIVE_DELAY_THRESHOLD) {
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+ MinecraftServer.LOGGER.warn("Entry " + entry.toString() + " has been scheduled with an excessive delay of: " + delay, new Throwable());
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+ }
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+ }
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+
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+ final long blockKey = MCUtil.getBlockKey(pos);
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+
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+ final ArrayList<NextTickListEntry<T>> currentEntries = this.entriesByBlock.computeIfAbsent(blockKey, (long keyInMap) -> new ArrayList<>(3));
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@ -645,7 +666,7 @@ index 000000000..666f49fe9
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/server/ticklist/TickListServerInterval.java b/src/main/java/com/destroystokyo/paper/server/ticklist/TickListServerInterval.java
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new file mode 100644
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index 000000000..13cf1a55a
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index 0000000000..13cf1a55a9
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/server/ticklist/TickListServerInterval.java
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@@ -0,0 +1,41 @@
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@ -692,7 +713,7 @@ index 000000000..13cf1a55a
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/util/set/LinkedSortedSet.java b/src/main/java/com/destroystokyo/paper/util/set/LinkedSortedSet.java
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new file mode 100644
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index 000000000..118988c39
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index 0000000000..118988c39e
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/util/set/LinkedSortedSet.java
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@@ -0,0 +1,142 @@
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@ -839,7 +860,7 @@ index 000000000..118988c39
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
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index e650a2e48..2d07d350d 100644
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index e650a2e48d..2d07d350d2 100644
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--- a/src/main/java/net/minecraft/server/BlockPosition.java
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+++ b/src/main/java/net/minecraft/server/BlockPosition.java
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@@ -125,6 +125,7 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
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@ -851,7 +872,7 @@ index e650a2e48..2d07d350d 100644
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return this.b(baseblockposition.getX(), baseblockposition.getY(), baseblockposition.getZ());
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}
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diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
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index a385a473a..82168b6ae 100644
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index 8412feef6b..1dcd0980ec 100644
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--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
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+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
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@@ -119,6 +119,13 @@ public class ChunkProviderServer extends IChunkProvider {
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@ -869,7 +890,7 @@ index a385a473a..82168b6ae 100644
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public ChunkProviderServer(WorldServer worldserver, File file, DataFixer datafixer, DefinedStructureManager definedstructuremanager, Executor executor, ChunkGenerator<?> chunkgenerator, int i, WorldLoadListener worldloadlistener, Supplier<WorldPersistentData> supplier) {
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this.world = worldserver;
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diff --git a/src/main/java/net/minecraft/server/NextTickListEntry.java b/src/main/java/net/minecraft/server/NextTickListEntry.java
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index 33cfeabde..2287e47d1 100644
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index 33cfeabdee..2287e47d1b 100644
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--- a/src/main/java/net/minecraft/server/NextTickListEntry.java
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+++ b/src/main/java/net/minecraft/server/NextTickListEntry.java
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@@ -5,11 +5,13 @@ import java.util.Comparator;
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@ -940,7 +961,7 @@ index 33cfeabde..2287e47d1 100644
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public String toString() {
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return this.e + ": " + this.a + ", " + this.b + ", " + this.c + ", " + this.f;
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diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
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index b38bc6775..9f8818c2d 100644
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index b38bc67758..9f8818c2d4 100644
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--- a/src/main/java/net/minecraft/server/PlayerChunk.java
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+++ b/src/main/java/net/minecraft/server/PlayerChunk.java
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@@ -474,7 +474,9 @@ public class PlayerChunk {
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@ -955,7 +976,7 @@ index b38bc6775..9f8818c2d 100644
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}
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});
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diff --git a/src/main/java/net/minecraft/server/StructureBoundingBox.java b/src/main/java/net/minecraft/server/StructureBoundingBox.java
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index dbb565e74..185658e23 100644
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index dbb565e74d..185658e230 100644
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--- a/src/main/java/net/minecraft/server/StructureBoundingBox.java
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+++ b/src/main/java/net/minecraft/server/StructureBoundingBox.java
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@@ -4,12 +4,12 @@ import com.google.common.base.MoreObjects;
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@ -994,7 +1015,7 @@ index dbb565e74..185658e23 100644
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return baseblockposition.getX() >= this.a && baseblockposition.getX() <= this.d && baseblockposition.getZ() >= this.c && baseblockposition.getZ() <= this.f && baseblockposition.getY() >= this.b && baseblockposition.getY() <= this.e;
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}
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diff --git a/src/main/java/net/minecraft/server/TickListServer.java b/src/main/java/net/minecraft/server/TickListServer.java
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index f533860bb..3f1aa5ced 100644
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index f533860bbe..3f1aa5ced6 100644
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--- a/src/main/java/net/minecraft/server/TickListServer.java
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+++ b/src/main/java/net/minecraft/server/TickListServer.java
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@@ -42,6 +42,11 @@ public class TickListServer<T> implements TickList<T> {
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@ -1117,7 +1138,7 @@ index f533860bb..3f1aa5ced 100644
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}
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}
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diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
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index c74b85917..3e5ed2bd4 100644
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index aa01f47c08..2de48e7537 100644
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--- a/src/main/java/net/minecraft/server/WorldServer.java
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+++ b/src/main/java/net/minecraft/server/WorldServer.java
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@@ -170,6 +170,13 @@ public class WorldServer extends World {
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@ -1148,5 +1169,5 @@ index c74b85917..3e5ed2bd4 100644
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}, IRegistry.FLUID::getKey, IRegistry.FLUID::get, this::a, "Fluids"); // Paper - Timings
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this.navigators = Sets.newHashSet();
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--
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2.25.1
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2.25.2
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