RocketChat/Rocket.Chat · error · Meteor.Error

error-nickname-size-exceeded

error-nickname-size-exceeded

Error message

Nickname size exceeds ${MAX_NICKNAME_LENGTH} characters

What it means

saveUserProfile enforces a nickname length limit: MAX_NICKNAME_LENGTH = 120 characters (apps/meteor/server/meteor-methods/users/saveUserProfile.ts:24). Nicknames longer than 120 characters are rejected before Users.setNickname runs.

Source

Thrown at apps/meteor/server/meteor-methods/users/saveUserProfile.ts:110

				method: 'saveUserProfile',
			});
		}
		if (settings.bio.length > MAX_BIO_LENGTH) {
			throw new Meteor.Error('error-bio-size-exceeded', `Bio size exceeds ${MAX_BIO_LENGTH} characters`, {
				method: 'saveUserProfile',
			});
		}
		await Users.setBio(user._id, settings.bio.trim());
	}

	if (user && (settings.nickname || settings.nickname === '')) {
		if (typeof settings.nickname !== 'string') {
			throw new Meteor.Error('error-invalid-field', 'nickname', {
				method: 'saveUserProfile',
			});
		}
		if (settings.nickname.length > MAX_NICKNAME_LENGTH) {
			throw new Meteor.Error('error-nickname-size-exceeded', `Nickname size exceeds ${MAX_NICKNAME_LENGTH} characters`, {
				method: 'saveUserProfile',
			});
		}
		await Users.setNickname(user._id, settings.nickname.trim());
	}

	if (user && settings.email) {
		await setEmailFunction(settings.email, user);
	}

	const canChangePasswordForOAuth = rcSettings.get<boolean>('Accounts_AllowPasswordChangeForOAuthUsers');
	if (canChangePasswordForOAuth || user?.services?.password) {
		// Should be the last check to prevent error when trying to check password for users without password
		if (settings.newPassword && rcSettings.get<boolean>('Accounts_AllowPasswordChange') === true && user?.services?.password?.bcrypt) {
			// don't let user change to same password
			if (user && (await compareUserPassword(user, { plain: settings.newPassword }))) {
				throw new Meteor.Error('error-password-same-as-current', 'Entered password same as current password', {
					method: 'saveUserProfile',

View on GitHub (pinned to b2c16d5842)

Solutions

  1. Add maxLength={120} and a counter to the nickname input
  2. Validate nickname.length <= 120 client-side and block submit
  3. Catch error-nickname-size-exceeded and show 'Nickname must be 120 characters or fewer'

Example fix

// before
const nickname = rawNickname; // unbounded

// after
const nickname = rawNickname.slice(0, 120); // or block submit when longer
Defensive patterns

Strategy: validation

Validate before calling

const MAX_NICKNAME_LENGTH = 120;
if (typeof nickname === 'string' && nickname.length > MAX_NICKNAME_LENGTH) {
  throw new RangeError(`Nickname exceeds ${MAX_NICKNAME_LENGTH} characters`);
}

Try / catch

catch (err) {
  if (err instanceof Meteor.Error && err.error === 'error-nickname-size-exceeded') {
    showFieldError('nickname', 'Nickname must be 120 characters or fewer');
  }
}

Prevention

When it happens

Trigger: settings.nickname.length > 120 in the saveUserProfile call - e.g. a display nickname pasted from a long string with no client-side maxlength.

Common situations: Frontends without a nickname character limit; imported data; users pasting full names or emoji-decorated strings that exceed the cap.

Related errors

AI-assisted analysis of RocketChat/Rocket.Chat@b2c16d5842 (2026-08-18). Data as JSON: /api/errors/09f9a49f5c6dd7bc. Report an issue: GitHub.