From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 4 Mar 2013 23:46:10 -0500
Subject: [PATCH] Chunk Save Reattempt

We commonly have "Stream Closed" errors on chunk saving, so this code should re-try to save the chunk in the event of failure and hopefully prevent rollbacks.

diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
index 1598da3449ee1c559cf503e1b20a0daaf6a033dd..1aa4d342b97f8be71c108194a6f1e0e2828aa364 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
@@ -265,7 +265,7 @@ public class RegionFile implements AutoCloseable {
                     return true;
                 }
             } catch (IOException ioexception) {
-                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(ioexception); // Paper
+                com.destroystokyo.paper.util.SneakyThrow.sneaky(ioexception); // Paper - we want the upper try/catch to retry this
                 return false;
             }
         }
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
index 1e49d17b54704e1b99c3ded458c4bc6842bd32bd..97a58da9d64d812942ceb71426d35b490bbbe817 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
@@ -11,6 +11,7 @@ import java.io.IOException;
 import javax.annotation.Nullable;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.NbtIo;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.util.ExceptionCollector;
 import net.minecraft.world.level.ChunkPos;
 
@@ -92,6 +93,7 @@ public final class RegionFileStorage implements AutoCloseable {
 
     protected void write(ChunkPos pos, CompoundTag tag) throws IOException {
         RegionFile regionfile = this.getFile(pos, false); // CraftBukkit
+        int attempts = 0; Exception laste = null; while (attempts++ < 5) { try { // Paper
         DataOutputStream dataoutputstream = regionfile.getChunkDataOutputStream(pos);
         Throwable throwable = null;
 
@@ -115,6 +117,18 @@ public final class RegionFileStorage implements AutoCloseable {
 
         }
 
+            // Paper start
+            return;
+        } catch (Exception ex)  {
+            laste = ex;
+        }
+        }
+
+        if (laste != null) {
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(laste);
+            MinecraftServer.LOGGER.error("Failed to save chunk", laste);
+        }
+        // Paper end
     }
 
     public void close() throws IOException {