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prevent crashes on expiring map desync, dont spam logs

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Aikar 2018-09-16 02:57:22 -04:00
parent d5da5375a6
commit 80ee619035
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1 changed files with 23 additions and 9 deletions
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28
Spigot-Server-Patches/0372-Fix-major-memory-leaks-in-ExpiringMap.patch
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@ -1,4 +1,4 @@
From 6a439506b07605dd8566c86b672d3ee955715b51 Mon Sep 17 00:00:00 2001
From 36d303e9b7046708890efc99f68d8dbab88ce4ac Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 16 Sep 2018 00:00:16 -0400
Subject: [PATCH] Fix major memory leaks in ExpiringMap
@ -11,10 +11,10 @@ not run on every manipulation, and instead to run clean
once per tick per expiring map.
diff --git a/src/main/java/net/minecraft/server/ExpiringMap.java b/src/main/java/net/minecraft/server/ExpiringMap.java
index 4006f5a69c..49021d29ee 100644
index 4006f5a69c..08d41e8cf0 100644
--- a/src/main/java/net/minecraft/server/ExpiringMap.java
+++ b/src/main/java/net/minecraft/server/ExpiringMap.java
@@ -6,25 +6,113 @@ import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
@@ -6,25 +6,120 @@ import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
import it.unimi.dsi.fastutil.longs.Long2LongMap.Entry;
import it.unimi.dsi.fastutil.objects.ObjectIterator;
import java.util.Map;
@ -116,10 +116,17 @@ index 4006f5a69c..49021d29ee 100644
+ @Override
+ public T compute(Long aLong, BiFunction<? super Long, ? super T, ? extends T> biFunction) {
+ setAccess(aLong);
+ return compute(aLong, biFunction);
+ return super.compute(aLong, biFunction);
+ }
+
+ @Override
+ public synchronized void clear() {
+ ttl.clear();
+ super.clear();
+ }
+
+ private boolean registered = false;
+ private boolean hasLeaked = false;
+
+ // Break clean to its own method to be ticked
+ synchronized boolean clean() {
@ -136,16 +143,23 @@ index 4006f5a69c..49021d29ee 100644
break;
}
@@ -33,7 +121,18 @@ public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
@@ -33,7 +128,25 @@ public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
objectiterator.remove();
}
}
-
+ if (this.ttl.size() != this.size()) {
+ MinecraftServer.LOGGER.error("WARNING: ExpiringMap desync - Memory leak risk!");
+ int ttlSize = this.ttl.size();
+ int thisSize = this.size();
+ if (ttlSize != thisSize) {
+ if (!hasLeaked) { // log once
+ hasLeaked = true;
+ MinecraftServer.LOGGER.warn("WARNING: ExpiringMap desync (" + ttlSize + ":" + thisSize + ")- Memory leak risk! We will recover from this, but this means there is still a bug. Please do not open an issue about this. Mention it in Discord (we don't need everyone reporting the same thing)");
+ }
+ try {
+ for (Entry<T> entry : this.long2ObjectEntrySet()) {
+ ttl.putIfAbsent(entry.getLongKey(), now);
+ }
+ } catch (Exception e) { } // Ignore any como's
+ }
+ if (isEmpty()) {
+ registered = false;