alibaba/spring-ai-alibaba · error · IllegalArgumentException

Unsupported logical operator type: ${value}

Error message

Unsupported logical operator type: ${value}

What it means

Thrown by LogicalOperatorType.fromValue when the given string does not match any known logical operator value (e.g. and/or). A plain enum-lookup failure indicating the DSL contains an unrecognized logical operator.

Source

Thrown at spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-start/src/main/java/com/alibaba/cloud/ai/studio/admin/builder/generator/model/workflow/LogicalOperatorType.java:38

	AND("and", "&&"), OR("or", "||");

	private final String value;

	private final String codeValue;

	LogicalOperatorType(String value, String codeValue) {
		this.value = value;
		this.codeValue = codeValue;
	}

	public static LogicalOperatorType fromValue(String value) {
		for (LogicalOperatorType logicalOperatorType : LogicalOperatorType.values()) {
			if (logicalOperatorType.value.equals(value)) {
				return logicalOperatorType;
			}
		}
		throw new IllegalArgumentException("Unsupported logical operator type: " + value);
	}

	public String getValue() {
		return this.value;
	}

	public String getCodeValue() {
		return this.codeValue;
	}

}

View on GitHub (pinned to f82da0b50f)

Solutions

1. Use the exact canonical value (check LogicalOperatorType.getValue() of valid constants)
2. Fix casing/typos in the DSL
3. Regenerate the DSL from the source platform
4. Add a mapping for the new value in LogicalOperatorType if supported upstream

Example fix

// before
LogicalOperatorType.fromValue("AND");
// after
LogicalOperatorType.fromValue("and");

boolean known = Arrays.stream(LogicalOperatorType.values()).anyMatch(t -> t.getValue().equals(value));

LogicalOperatorType safeFromValue(String v) { try { return LogicalOperatorType.fromValue(v); } catch (IllegalArgumentException e) { return null; } }

When it happens

Trigger: Parsing DSL containing a logical operator field with an unexpected string — typo ('AND' vs 'and'), null/empty value, or operator added in a newer DSL schema version.

Common situations: Hand-edited DSL, cross-version Dify/Studio exports, case-sensitivity mistakes when authoring workflow conditions.

Understand the failure class

Background: Invalid enum value errors: "Unknown type", "Invalid scope", "must be one of" — when a string is not on the library's allowed list — this error's family across 23 libraries.

Related errors

• Not support dslValue: [${dslValue}] for type: [${variableTyp
• Invalid write mode: ${dslValue}
• Read dsl file failed, please check if the encoding of file i
• unsupported app mode: ${param.getMode()}
• unsupported mode: ${metadata.getMode()}

AI-assisted analysis of alibaba/spring-ai-alibaba@f82da0b50f (2026-09-09). Data as JSON: /api/errors/68b7c5e6a1228fc1. Report an issue: GitHub.