papermc/Spigot-Server-Patches/0059-Chunk-Save-Reattempt.patch

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/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index d2977022d163edc5518dd4737c30cffd3eff5954..26b55108ecf4cd48762b00da625b0ce1d2f42c67 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -246,7 +246,7 @@ 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/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index 4d1de29e7c4bea266c544917fbe807a0b19462d6..4cff831de2128cd346f1f1627f0915d534b0d3bf 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -87,6 +87,7 @@ public final class RegionFileCache implements AutoCloseable {
 
     protected void write(ChunkCoordIntPair chunkcoordintpair, NBTTagCompound nbttagcompound) throws IOException {
         RegionFile regionfile = this.getFile(chunkcoordintpair, false); // CraftBukkit
+        int attempts = 0; Exception laste = null; while (attempts++ < 5) { try { // Paper
         DataOutputStream dataoutputstream = regionfile.c(chunkcoordintpair);
         Throwable throwable = null;
 
@@ -110,6 +111,18 @@ public final class RegionFileCache 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 {