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Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
37 Zeilen
2.0 KiB
Diff
37 Zeilen
2.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Wed, 16 Mar 2022 13:58:16 +0100
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Subject: [PATCH] Improve java version check
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Co-Authored-By: MiniDigger <admin@benndorf.dev>
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diff --git a/src/main/java/org/bukkit/craftbukkit/Main.java b/src/main/java/org/bukkit/craftbukkit/Main.java
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index 446403f73fb1b5687d587889e6f32dce464d05a6..ed167d0d399924d54d9ff99c10ab8ee093efc149 100644
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--- a/src/main/java/org/bukkit/craftbukkit/Main.java
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+++ b/src/main/java/org/bukkit/craftbukkit/Main.java
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@@ -203,11 +203,20 @@ public class Main {
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return;
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}
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- float javaVersion = Float.parseFloat(System.getProperty("java.class.version"));
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- if (javaVersion > 66.0) {
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- System.err.println("Unsupported Java detected (" + javaVersion + "). Only up to Java 22 is supported.");
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- return;
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+ // Paper start - Improve java version check
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+ boolean skip = Boolean.getBoolean("Paper.IgnoreJavaVersion");
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+ String javaVersionName = System.getProperty("java.version");
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+ // J2SE SDK/JRE Version String Naming Convention
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+ boolean isPreRelease = javaVersionName.contains("-");
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+ if (isPreRelease) {
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+ if (!skip) {
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+ System.err.println("Unsupported Java detected (" + javaVersionName + "). You are running an unsupported, non official, version. Only general availability versions of Java are supported. Please update your Java version. See https://docs.papermc.io/paper/faq#unsupported-java-detected-what-do-i-do for more information.");
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+ return;
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+ }
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+
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+ System.err.println("Unsupported Java detected ("+ javaVersionName + "), but the check was skipped. Proceed with caution! ");
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}
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+ // Paper end - Improve java version check
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try {
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// Paper start - Handled by TerminalConsoleAppender
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