paascloud/paascloud-master · warning · UacBizException

UAC10011019

UAC10011019

Error message

邮箱已存在

What it means

UAC10011019 is thrown during registration when a UacUser template with the requested email yields selectCount > 0, meaning an account with that email already exists. Registration is rejected with '邮箱已存在' to keep emails unique (the email is also the activation/reset identity, see UAC10011004).

Solutions

1. If the account exists, use login or 'forgot password' instead of registering again.
2. Check email availability before submitting (validation endpoint or SELECT COUNT(*) FROM uac_user WHERE email = ?).
3. Normalize/trim/lowercase the email on both insert and lookup to avoid case-variant duplicates.
4. Debounce/disable the submit button server-side (idempotency key) to prevent double-registration races, and add a UNIQUE index on email.

Example fix

// before
UacUser q = new UacUser(); q.setEmail(registerDto.getEmail());
if (uacUserMapper.selectCount(q) > 0) { throw new UacBizException(ErrorCodeEnum.UAC10011019); }
// after
String email = registerDto.getEmail().trim().toLowerCase();
UacUser q = new UacUser(); q.setEmail(email);
if (uacUserMapper.selectCount(q) > 0) { throw new UacBizException(ErrorCodeEnum.UAC10011019); }
registerDto.setEmail(email);

UacUser q = new UacUser();
q.setEmail(requestedEmail.trim().toLowerCase());
if (uacUserMapper.selectCount(q) > 0) {
    return Result.fail("email already registered; please log in or reset password");
}

try {
    uacUserService.register(registerDto);
} catch (UacBizException e) {
    if ("UAC10011019".equals(e.getCode())) { return Result.fail(409, "email already exists"); }
    throw e;
}

When it happens

Trigger: Registering with an email already used by another account; retrying after a previous registration already created the row; email case differences (Foo@x.com vs foo@x.com) counting as the same user on case-insensitive collations; concurrent duplicate submissions (double-click on Register).

Common situations: Users forgetting they registered and hitting 'sign up' again; double-submit from an unthrottled form button; corporate shared mailboxes; migration leaving both legacy and new rows with the same email.

Related errors

• UAC10011012
• UAC10011013
• OPC10040005
• UAC10011004
• UAC10011019

AI-assisted analysis of paascloud/paascloud-master@781281a950 (2026-09-10). Data as JSON: /api/errors/d9d9b7201f1c09f1. Report an issue: GitHub.

Appendix: source

Thrown at paascloud-provider/paascloud-provider-uac/src/main/java/com/paascloud/provider/service/impl/UacUserServiceImpl.java:974

		UacUser uacUser = new UacUser();
		uacUser.setLoginName(registerDto.getLoginName());
		int count = uacUserMapper.selectCount(uacUser);
		if (count > 0) {
			throw new UacBizException(ErrorCodeEnum.UAC10011012);
		}

		uacUser = new UacUser();
		uacUser.setMobileNo(registerDto.getMobileNo());
		count = uacUserMapper.selectCount(uacUser);
		if (count > 0) {
			throw new UacBizException(ErrorCodeEnum.UAC10011013);
		}

		uacUser = new UacUser();
		uacUser.setEmail(registerDto.getEmail());
		count = uacUserMapper.selectCount(uacUser);
		if (count > 0) {
			throw new UacBizException(ErrorCodeEnum.UAC10011019);
		}

	}
}

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