apache/flink · error · java.lang.IllegalArgumentException

Unsupported type '{}' in node: {}

Error message

Unsupported type '{}' in node: {}

What it means

Error "Unsupported type '{}' in node: {}" thrown in apache/flink.

Source

Thrown at flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/JsonRowSchemaConverter.java:180

                            typeSet.add(Types.STRING);
                        }
                        break;
                    case TYPE_NUMBER:
                        typeSet.add(Types.BIG_DEC);
                        break;
                    case TYPE_INTEGER:
                        // use BigDecimal for easier interoperability
                        // without affecting the correctness of the result
                        typeSet.add(Types.BIG_DEC);
                        break;
                    case TYPE_OBJECT:
                        typeSet.add(convertObject(location, node, root));
                        break;
                    case TYPE_ARRAY:
                        typeSet.add(convertArray(location, node, root));
                        break;
                    default:
                        throw new IllegalArgumentException(
                                "Unsupported type '"
                                        + node.get(TYPE).asText()
                                        + "' in node: "
                                        + location);
                }
            }
        }
        // use TYPE of reference as fallback if present
        else {
            ref.filter(r -> r.has(TYPE))
                    .ifPresent(r -> typeSet.add(convertType(node.get(REF).asText(), r, root)));
        }

        // simple interpretation of ONE_OF for supporting "object or null"
        if (node.has(ONE_OF) && node.get(ONE_OF).isArray()) {
            final TypeInformation<?>[] types =
                    convertTypes(location + '/' + ONE_OF, node.get(ONE_OF), root);
            typeSet.addAll(Arrays.asList(types));

View on GitHub (pinned to 2f3c205e92)

Solutions

1. Address the cause reported by the error message: Unsupported type 'the reported value' in node: the reported value
2. Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry.

Example fix

Correct the condition described ("Unsupported type 'the reported value' in node: the reported value") and rerun the job or command.

When it happens

Trigger: Triggered at runtime when the operation fails because: Unsupported type 'the reported value' in node: the reported value.

Common situations: Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Unsupported type 'the reported value' in node: the reported value.

AI-assisted analysis of apache/flink@2f3c205e92 (2026-08-14). Data as JSON: /api/errors/2f5def95192efd77. Report an issue: GitHub.