apache/cassandra · error · InvalidTypeException

Cannot parse UDT value from

Error message

Cannot parse UDT value from "%s", at character %d expecting ',' but got '%c'

What it means

InvalidTypeException from UDTCodec.parse: after a field's value, the next character is neither '}' (end of the UDT) nor ',' (next field). The parser requires one of those two separators between field entries; any other character is reported with its position.

Solutions

1. Separate field entries with ',' and terminate the literal with '}'
2. Remove the stray character at the reported position
3. Check for duplicated or missing separators after pasting/editing the literal

When it happens

Trigger: Thrown at src/java/org/apache/cassandra/cql3/functions/types/TypeCodec.java:2715 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/4f6705ad6597f412. Report an issue: GitHub.

Appendix: source

Thrown at src/java/org/apache/cassandra/cql3/functions/types/TypeCodec.java:2715

                    n = ParseUtils.skipCQLValue(value, idx);
                }
                catch (IllegalArgumentException e)
                {
                    throw new InvalidTypeException(
                    String.format(
                    "Cannot parse UDT value from \"%s\", invalid CQL value at character %d",
                    value, idx),
                    e);
                }

                String input = value.substring(idx, n);
                v = parseAndSetField(input, v, name);
                idx = n;

                idx = ParseUtils.skipSpaces(value, idx);
                if (value.charAt(idx) == '}') return v;
                if (value.charAt(idx) != ',')
                    throw new InvalidTypeException(
                    String.format(
                    "Cannot parse UDT value from \"%s\", at character %d expecting ',' but got '%c'",
                    value, idx, value.charAt(idx)));
                ++idx; // skip ','

                idx = ParseUtils.skipSpaces(value, idx);
            }
            throw new InvalidTypeException(
            String.format("Malformed UDT value \"%s\", missing closing '}'", value));
        }

        /**
         * Return a new instance of {@code T}.
         *
         * @return A new instance of {@code T}.
         */
        protected abstract T newInstance();

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