apache/cassandra · error · MarshalException

Invalid remaining data after end of tuple value

Error message

Invalid remaining data after end of tuple value

What it means

MarshalException from TupleSerializer.validate after all declared fields have been consumed: bytes still remain in the buffer. Tuples allow fewer components than declared (field addition), but trailing unaccounted bytes indicate an invalid or stale serialization that does not match the current tuple type.

Solutions

1. Align the written tuple with the current type definition (drop extra trailing components)
2. Check for schema/type drift between the writer and the current tuple type
3. Validate input client-side before sending

When it happens

Trigger: Thrown at src/java/org/apache/cassandra/serializers/TupleSerializer.java:63 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/cassandra@88fd0f6a0e (2026-09-10). Data as JSON: /api/errors/100b10705208c96f. Report an issue: GitHub.

Appendix: source

Thrown at src/java/org/apache/cassandra/serializers/TupleSerializer.java:63

            int size = accessor.getInt(input, offset);
            offset += TypeSizes.INT_SIZE;

            // size < 0 means null value
            if (size < 0)
                continue;

            if (accessor.sizeFromOffset(input, offset) < size)
                throw new MarshalException(String.format("Not enough bytes to read %dth component", i));

            V field = accessor.slice(input, offset, size);
            offset += size;
            fields.get(i).validate(field, accessor);
        }

        // We're allowed to get less fields than declared, but not more
        if (!accessor.isEmptyFromOffset(input, offset))
            throw new MarshalException("Invalid remaining data after end of tuple value");
    }
}

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