@Override
    public String toString() {
        StringBuilder builder = new StringBuilder();

        builder.append(getClass().getName()).append(": ");

        if (this.message != null) {
            builder.append(message);
        }

        if (status > 0) {
            builder.append(" {status=").append(status);
            if (this.code != null) {
                builder.append(", code='").append(code).append("'");
            }

            builder.append(", retryable: ").append(retryable);
        }

        if (this.instance != null) {
            builder.append(", instance: ").append(instance);
        }

        if (this.validationErrors != null) {
            builder.append(", validationErrors: ").append(validationErrors.toString());
        }

        builder.append("}");
        return builder.toString();
    }
Client exception thrown from Conductor api clients.
client/src/main/java/com/netflix/conductor/client/exception/ConductorClientException.java