diff --git a/src/main/java/org/gcube/dataanalysis/executor/job/management/QueueJobManager.java b/src/main/java/org/gcube/dataanalysis/executor/job/management/QueueJobManager.java
index bcb7a20..b2b74b4 100644
--- a/src/main/java/org/gcube/dataanalysis/executor/job/management/QueueJobManager.java
+++ b/src/main/java/org/gcube/dataanalysis/executor/job/management/QueueJobManager.java
@@ -594,13 +594,16 @@ public class QueueJobManager {
 			AnalysisLogger.getLogger().info("Unnecessary to Uploading Files");
 
 		AnalysisLogger.getLogger().info("Loading files");
+		//patch for concurrent uploads
+		String tempdir = ""+UUID.randomUUID()+"/";
 		for (File sfile : files) {
 			if (sfile.getName().startsWith("."))
 				continue;
 			
 			String localf = sfile.getAbsolutePath();
 			String filename = sfile.getName();
-			String remotef = remoteDir + sfile.getName();
+			
+			String remotef = remoteDir + tempdir+sfile.getName();
 			if (uploadFiles) {
 				client.put(true).LFile(localf).RFile(remotef);
 				AnalysisLogger.getLogger().info("Uploading File "+localf+" as remote file "+remotef);