dotnet/orleans · error · InvalidOperationException

You have already created 5 polls, which is enough for anybod

Error message

You have already created 5 polls, which is enough for anybody.

What it means

Thrown by Voting UserAgentGrain.CreatePoll when the user has already created 5 polls (_myPolls.Count >= 5). It enforces a per-user quota, a deliberate limit (the message is a deliberate Quora-style joke 'enough for anybody').

Source

Thrown at samples/Voting/Grains/UserAgentGrain.cs:48

        // Get a reference to the poll grain
        var pollGrain = _grainFactory.GetGrain<IPollGrain>(pollId);

        // Get the current poll results
        var results = await pollGrain.GetCurrentResults();

        // Return the results as well as whether we've voted in the poll or not
        return (Results: results, Voted: _votedPolls.Contains(pollId));
    }

    public async Task<string> CreatePoll(PollState initialState)
    {
        Throttle();

        // Limit the number of polls any one user can make
        if (_myPolls.Count >= 5)
        {
            throw new InvalidOperationException("You have already created 5 polls, which is enough for anybody.");
        }

        // Generate a new id and get a reference to the PollGrain with that id
        var pollId = Guid.NewGuid().ToString("N")[..6];
        var pollGrain = _grainFactory.GetGrain<IPollGrain>(pollId);

        // Create the poll. We could avoid collisions here by making this return an error if a poll
        // with that id already exists.
        await pollGrain.CreatePoll(initialState);

        _myPolls.Add(pollId);
        return pollId;
    }

    public async Task<PollState> AddVote(string pollId, int optionId)
    {
        Throttle();

View on GitHub (pinned to fca799fa70)

Solutions

1. Use a different user grain key (new user) once the quota is reached.
2. Raise or remove the `>= 5` cap if your fork needs more polls.
3. Catch InvalidOperationException and tell the user they have reached the limit.

Example fix

// before
if (_myPolls.Count >= 5) throw new InvalidOperationException("...");

// after: configurable quota
if (_myPolls.Count >= MaxPollsPerUser) throw new InvalidOperationException("...");

// Track polls created per user on the client and stop before the limit
if (createdPolls >= 5) { ShowMessage("Poll limit reached."); return; }

null

try { await user.CreatePoll(state); }
catch (InvalidOperationException ex) when (ex.Message.Contains("5 polls"))
{ /* inform user they hit the quota */ }

When it happens

Trigger: A user (one grain key per user) calls CreatePoll a sixth time; _myPolls is a per-activation set that grows by one each successful create.

Common situations: A test loop creating many polls under the same user id; a UI bug that double-submits; legitimately needing more than five polls.

Related errors

• Invalid option {optionId}
• You have already voted in that poll!
• The requested vote option was not found.
• Missing value for {name}.
• Can't join game once its over

AI-assisted analysis of dotnet/orleans@fca799fa70 (2026-08-13). Data as JSON: /api/errors/aac6e5cc7c415424. Report an issue: GitHub.