add closing stream on error when uploading file

ozgcloud-common-lib/src/main/java/de/ozgcloud/common/binaryfile/GrpcFileUploadUtils.java

@@ -99,12 +99,14 @@ public class GrpcFileUploadUtils {
 			LOG.warn("File transfer canceled on timeout");
 			resultFuture.cancel(true);
 			requestObserver.onError(new TechnicalException("Timeout on waiting for upload."));
+			closeStreams();
 		}
 
 		public void cancelOnError(Throwable t) {
 			LOG.error("File tranfer canceled on error.", t);
 			resultFuture.cancel(true);
 			requestObserver.onError(t);
+			closeStreams();
 		}
 
 		void sendNext() {
@@ -152,7 +154,13 @@ public class GrpcFileUploadUtils {
 		private void endTransfer() {
 			requestObserver.onCompleted();
 			done.set(true);
-			LOG.debug("File Transfer done. Closing stream.");
+			LOG.debug("File Transfer done.");
+			closeStreams();
+
+		}
+
+		private void closeStreams() {
+			LOG.debug("Closing streams");
 			IOUtils.closeQuietly(inputStream);
 			streamReader.close();
 		}