Github user spmallette commented on a diff in the pull request: https://github.com/apache/tinkerpop/pull/534#discussion_r96403984 --- Diff: gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ser/AbstractGryoMessageSerializerV1d0.java --- @@ -301,9 +301,12 @@ private Object serializeResultToString(final ResponseMessage msg) { if (msg.getResult().getData() == null) return "null"; // the IteratorHandler should return a collection so keep it as such + // Sasl authentication needs byte[] to pass unchanged final Object o = msg.getResult().getData(); if (o instanceof Collection) { return ((Collection) o).stream().map(d -> null == d ? "null" : d.toString()).collect(Collectors.toList()); + } else if (o instanceof byte[]) { --- End diff -- I think you should undo this special handling - based on my explanation on #533
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