Determine chunk Y offset on Java packet processing thread

Should stop NullPointerExceptions if the session closes before chunks are processed

connector/src/main/java/org/geysermc/connector/network/translators/java/world/JavaChunkDataTranslator.java

@@ -55,9 +55,12 @@ public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPac
         session.getChunkCache().addToCache(packet.getColumn());
         Column column = packet.getColumn();
 
+        // Ensure that, if the player is using lower world heights, the position is not offset
+        int yOffset = session.getChunkCache().getChunkMinY();
+
         GeyserConnector.getInstance().getGeneralThreadPool().execute(() -> {
             try {
-                ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(session, column);
+                ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(session, column, yOffset);
                 ChunkSection[] sections = chunkData.getSections();
 
                 // Find highest section

connector/src/main/java/org/geysermc/connector/utils/ChunkUtils.java

@@ -81,10 +81,8 @@ public class ChunkUtils {
         return (yzx >> 8) | (yzx & 0x0F0) | ((yzx & 0x00F) << 8);
     }
 
-    public static ChunkData translateToBedrock(GeyserSession session, Column column) {
+    public static ChunkData translateToBedrock(GeyserSession session, Column column, int yOffset) {
         Chunk[] javaSections = column.getChunks();
-        // Ensure that, if the player is using lower world heights, the position is not offset
-        int yOffset = session.getChunkCache().getChunkMinY();
         ChunkSection[] sections = new ChunkSection[javaSections.length - yOffset];
 
         // Temporarily stores compound tags of Bedrock-only block entities