write to disk

src/main/java/com/cfdeployer/service/ChunkedUploadService.java

@@ -61,16 +61,26 @@ public class ChunkedUploadService {
                             fileType, fileState.getTotalChunks(), totalChunks));
         }
 
-        // Write chunk to file
+        // Write chunk to file using streaming to avoid loading entire chunk into memory
         Path targetPath = fileState.getTargetPath();
         long offset = (long) chunkIndex * getChunkSize();
 
-        try (RandomAccessFile raf = new RandomAccessFile(targetPath.toFile(), "rw")) {
+        try (RandomAccessFile raf = new RandomAccessFile(targetPath.toFile(), "rw");
+             var inputStream = chunk.getInputStream()) {
             raf.seek(offset);
-            byte[] data = chunk.getBytes();
+
-            raf.write(data);
+            // Stream chunk data in smaller buffers to reduce memory pressure
+            byte[] buffer = new byte[8192]; // 8KB buffer
+            int bytesRead;
+            long totalWritten = 0;
+
+            while ((bytesRead = inputStream.read(buffer)) != -1) {
+                raf.write(buffer, 0, bytesRead);
+                totalWritten += bytesRead;
+            }
+
             log.debug("Wrote chunk {} ({} bytes) to {} at offset {}",
-                    chunkIndex, data.length, targetPath.getFileName(), offset);
+                    chunkIndex, totalWritten, targetPath.getFileName(), offset);
         }
 
         fileState.markChunkReceived(chunkIndex);

src/main/resources/application.properties

@@ -5,17 +5,19 @@ server.port=8080
 spring.application.name=cf-deployer
 
 # Multipart Configuration - for traditional single upload endpoint
-spring.servlet.multipart.max-file-size=500MB
+spring.servlet.multipart.max-file-size=10MB
-spring.servlet.multipart.max-request-size=500MB
+spring.servlet.multipart.max-request-size=10MB
 spring.servlet.multipart.enabled=true
+# Write all uploads directly to disk, not memory (prevents OutOfMemoryError)
+spring.servlet.multipart.file-size-threshold=0
 
 # Cloud Foundry CLI Configuration
 cf.cli.timeout=600
 cf.cli.path=
 
 # Chunked Upload Configuration
-# Recommended chunk size: 5MB (client-side should match this)
+# Reduced chunk size to 2MB to avoid memory issues on low-memory Tanzu instances
-cf.upload.chunk.size=5242880
+cf.upload.chunk.size=2097152
 # Session timeout in minutes (default: 30 minutes)
 cf.upload.session.timeout-minutes=30