{"record":{"id":"3ba75a194ed271f7","repo":"apache/cassandra","slug":"not-enough-bytes-to-deserialize-a-tuple","errorCode":null,"errorMessage":"Not enough bytes to deserialize a tuple","messagePattern":"Not enough bytes to deserialize a tuple","errorType":"exception","errorClass":"InvalidTypeException","httpStatus":null,"severity":"error","filePath":"src/java/org/apache/cassandra/cql3/functions/types/TypeCodec.java","lineNumber":2926,"sourceCode":"        {\n            if (bytes == null) return null;\n            // empty byte buffers will result in empty values\n            try\n            {\n                ByteBuffer input = bytes.duplicate();\n                T value = newInstance();\n                int i = 0;\n                while (input.hasRemaining() && i < definition.getComponentTypes().size())\n                {\n                    int n = input.getInt();\n                    ByteBuffer element = n < 0 ? null : CodecUtils.readBytes(input, n);\n                    value = deserializeAndSetField(element, value, i++, protocolVersion);\n                }\n                return value;\n            }\n            catch (BufferUnderflowException e)\n            {\n                throw new InvalidTypeException(\"Not enough bytes to deserialize a tuple\", e);\n            }\n        }\n\n        @Override\n        public String format(T value)\n        {\n            if (value == null) return \"NULL\";\n            StringBuilder sb = new StringBuilder(\"(\");\n            int length = definition.getComponentTypes().size();\n            for (int i = 0; i < length; i++)\n            {\n                if (i > 0) sb.append(',');\n                sb.append(formatField(value, i));\n            }\n            sb.append(')');\n            return sb.toString();\n        }\n","sourceCodeStart":2908,"sourceCodeEnd":2944,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/cql3/functions/types/TypeCodec.java#L2908-L2944","documentation":"This InvalidTypeException is thrown by the tuple codec's deserialize method when the wire-format buffer ends before all tuple fields have been read. The driver wraps the underlying BufferUnderflowException to give a clearer message. It means the serialized bytes do not contain the full expected tuple payload for the declared type.","triggerScenarios":"Calling TypeCodec TupleCodec.deserialize on a ByteBuffer truncated by a producer bug, a partially-copied blob column, or deserializing with a tuple definition whose field list has more types than the encoded data contains.","commonSituations":"Application code reading tuple columns from an external SStable/blob dump, hand-rolled serialization writing fewer bytes than declared fields, or a protocol version mismatch truncating multi-byte values.","solutions":["Verify the source of the ByteBuffer is complete: check the byte array length against the total serialized size of all tuple fields before calling deserialize.","Ensure the tuple definition (field count/types) used for deserialization matches the one used at write time.","Re-serialize the value with the same codec/protocol version it will be read with.","Log the raw hex bytes (Bytes.toHexString) and compare with a value serialized by the driver to spot where truncation occurs."],"exampleFix":"// before\nTupleValue v = tupleCodec.deserialize(ByteBuffer.wrap(partialBytes), ProtocolVersion.V4);\n// after\nbyte[] raw = fullSerializedBytes(); // ensure complete payload\nTupleValue v = tupleCodec.deserialize(ByteBuffer.wrap(raw), ProtocolVersion.V4);","handlingStrategy":"try-catch","validationCode":"if (buf.remaining() < expectedSerializedSize) throw new IllegalArgumentException(\"buffer too small for tuple\");","typeGuard":null,"tryCatchPattern":"try { value = codec.deserialize(buf, protocolVersion); } catch (InvalidTypeException e) { log.error(\"truncated tuple: {}\", Bytes.toHexString(buf)); value = null; }","preventionTips":["Always round-trip values through the driver's codec rather than hand-packing bytes","Validate buffer.remaining() matches expected size before deserialize","Keep tuple type definitions in sync between writer and reader"],"tags":["deserialization","tuple","cql"],"backgroundTag":"invalid-argument-value","analyzedSha":"88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1","analyzedAt":"2026-09-10T07:29:22.284Z","contentChangedAt":"2026-09-10T07:29:22.284Z","schemaVersion":2},"datasetVersion":"2026-09-17T15:17:12.973Z"}