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SPIGOT-5116: Fix concurrent modification exception inside ChunkMapDistance

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Irmo van den Berge 2019-07-13 20:23:41 +02:00 committed by md_5
parent 989f9b3daa
commit eb2e657871
1 changed files with 42 additions and 8 deletions
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50
nms-patches/ChunkMapDistance.patch
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@ -1,6 +1,6 @@
--- a/net/minecraft/server/ChunkMapDistance.java
+++ b/net/minecraft/server/ChunkMapDistance.java
@@ -32,7 +32,7 @@
@@ -32,11 +32,11 @@
private static final Logger LOGGER = LogManager.getLogger();
private static final int b = 33 + ChunkStatus.a(ChunkStatus.FULL) - 2;
private final Long2ObjectMap<ObjectSet<EntityPlayer>> c = new Long2ObjectOpenHashMap();
@ -9,6 +9,11 @@
private final ChunkMapDistance.a e = new ChunkMapDistance.a();
private final ChunkMapDistance.b f = new ChunkMapDistance.b(8);
private final ChunkMapDistance.c g = new ChunkMapDistance.c(33);
- private final Set<PlayerChunk> h = Sets.newHashSet();
+ private final Set<PlayerChunk> h = Sets.newHashSet(); // PAIL pendingChunkUpdates
private final PlayerChunk.c i;
private final Mailbox<ChunkTaskQueueSorter.a<Runnable>> j;
private final Mailbox<ChunkTaskQueueSorter.b> k;
@@ -61,7 +61,7 @@
while (objectiterator.hasNext()) {
Entry<ObjectSortedSet<Ticket<?>>> entry = (Entry) objectiterator.next();
@ -18,7 +23,36 @@
return ticket.a(this.currentTick);
})) {
this.e.b(entry.getLongKey(), this.a((ObjectSortedSet) entry.getValue()), false);
@@ -124,7 +124,7 @@
@@ -99,10 +99,25 @@
}
if (!this.h.isEmpty()) {
- this.h.forEach((playerchunk) -> {
+ // CraftBukkit start
+ // Iterate pending chunk updates with protection against concurrent modification exceptions
+ java.util.Iterator<PlayerChunk> iter = this.h.iterator();
+ int expectedSize = this.h.size();
+ do {
+ PlayerChunk playerchunk = iter.next();
+ iter.remove();
+ expectedSize--;
+
playerchunk.a(playerchunkmap);
- });
- this.h.clear();
+
+ // Reset iterator if set was modified using add()
+ if (this.h.size() != expectedSize) {
+ expectedSize = this.h.size();
+ iter = this.h.iterator();
+ }
+ } while (iter.hasNext());
+ // CraftBukkit end
+
return true;
} else {
if (!this.l.isEmpty()) {
@@ -124,7 +139,7 @@
completablefuture.thenAccept((either) -> {
this.m.execute(() -> {
@ -27,7 +61,7 @@
}, j, false));
});
});
@@ -138,7 +138,7 @@
@@ -138,7 +153,7 @@
}
}
@ -36,7 +70,7 @@
ObjectSortedSet<Ticket<?>> objectsortedset = this.e(i);
ObjectBidirectionalIterator<Ticket<?>> objectbidirectionaliterator = objectsortedset.iterator();
int j;
@@ -149,21 +149,24 @@
@@ -149,21 +164,24 @@
j = PlayerChunkMap.GOLDEN_TICKET + 1;
}
@ -64,7 +98,7 @@
}
if (objectsortedset.isEmpty()) {
@@ -171,16 +174,27 @@
@@ -171,16 +189,27 @@
}
this.e.b(i, this.a(objectsortedset), false);
@ -95,7 +129,7 @@
}
public <T> void addTicket(TicketType<T> tickettype, ChunkCoordIntPair chunkcoordintpair, int i, T t0) {
@@ -247,6 +261,21 @@
@@ -247,6 +276,21 @@
return this.f.a.containsKey(i);
}
@ -117,7 +151,7 @@
class a extends ChunkMap {
public a() {
@@ -333,7 +362,7 @@
@@ -333,7 +377,7 @@
Ticket<?> ticket = new Ticket<>(TicketType.PLAYER, ChunkMapDistance.b, new ChunkCoordIntPair(i), ChunkMapDistance.this.currentTick);
if (flag1) {
@ -126,7 +160,7 @@
ChunkMapDistance.this.m.execute(() -> {
ChunkMapDistance.this.a(i, ticket);
ChunkMapDistance.this.l.add(i);
@@ -342,7 +371,7 @@
@@ -342,7 +386,7 @@
return j;
}));
} else {