Close stream after sending file

kop-common-lib/src/main/java/de/itvsh/kop/common/binaryfile/GrpcFileUploadUtils.java

@@ -150,6 +150,7 @@ public class GrpcFileUploadUtils {
 				IOUtils.closeQuietly(inputStream);
 				requestObserver.onCompleted();
 				done.set(true);
+				IOUtils.closeQuietly(inputStream);
 			}
 		}
 	}