Supabase Realtime Subscription Limit Exceeded

The number of active subscriptions has exceeded the allowed limit.

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What is

Supabase Realtime Subscription Limit Exceeded

?

Resolving 'Subscription Limit Exceeded' in Supabase Realtime

Understanding Supabase Realtime

Supabase Realtime is a powerful feature of the Supabase platform that allows developers to listen to changes in their database in real-time. It is built on top of PostgreSQL's replication functionality and provides a seamless way to build reactive applications. By subscribing to database changes, developers can update their application state instantly, providing a dynamic user experience.

Identifying the Symptom

When working with Supabase Realtime, you might encounter an error message stating 'Subscription Limit Exceeded'. This error typically manifests when attempting to add a new subscription to your database changes, and it fails due to exceeding the allowed number of active subscriptions.

What You Observe

Developers will notice that new subscriptions are not being registered, and the application may not respond to database changes as expected. This can lead to stale data being displayed to users.

Explaining the Issue

The 'Subscription Limit Exceeded' error occurs when the number of active subscriptions surpasses the limit set by your current Supabase plan. Each plan has a predefined number of subscriptions that can be active simultaneously. When this limit is reached, any additional subscription attempt will result in this error.

Why It Happens

This issue is common in applications with high concurrency or those that require multiple real-time listeners. As your application scales, the number of subscriptions can quickly add up, especially if not managed efficiently.

Steps to Fix the Issue

To resolve the 'Subscription Limit Exceeded' error, you can take the following steps:

1. Review and Optimize Active Subscriptions

Audit your current subscriptions to ensure that each one is necessary. Remove any redundant or unused subscriptions.
Consider consolidating subscriptions where possible. For example, if multiple subscriptions listen to changes on the same table, they might be combined into a single subscription.

2. Upgrade Your Supabase Plan

If optimization is not sufficient, consider upgrading your Supabase plan to accommodate more subscriptions. Visit the Supabase Pricing Page to explore different plans and their limits.

3. Implement Subscription Management

Implement logic in your application to dynamically manage subscriptions. For instance, subscribe only when necessary and unsubscribe when the data is no longer needed.
Use a subscription pool to reuse subscriptions efficiently.

Additional Resources

For more information on managing subscriptions and optimizing your Supabase usage, check out the following resources:

Supabase Realtime Documentation
Supabase Blog for updates and best practices.

By following these steps, you can effectively manage your Supabase Realtime subscriptions and ensure your application remains responsive and efficient.

Attached error:

Supabase Realtime Subscription Limit Exceeded

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MORE ISSUES

Supabase Realtime Invalid Event Schema

The schema for an event does not match the expected format.

Supabase Realtime Invalid Event Processing Logic

The logic for processing events is not valid or incorrectly implemented.

Supabase Realtime Server-Side Configuration Error

There is a misconfiguration on the server side affecting Realtime operations.

Supabase Realtime The client has reached the maximum number of allowed connections.

The client-side connection limit has been exceeded.

Supabase Realtime Invalid Event Handler

The event handler specified is not valid or incorrectly implemented.

Supabase Realtime Invalid Event Subscription

The event subscription is not valid or incorrectly implemented.

Supabase Realtime High latency on the server side is affecting performance.

Server-Side Latency

Supabase Realtime Invalid Event Metadata

The metadata associated with an event is not valid or incomplete.

Supabase Realtime Client-Side Memory Leak

The client application is consuming excessive memory due to a leak.

Supabase Realtime Server Resource Exhaustion

The server has run out of resources to handle incoming requests.

Supabase Realtime Server Configuration Error

There is a misconfiguration on the Supabase Realtime server.

Supabase Realtime Invalid Event Callback

The callback function for an event is not valid or incorrectly implemented.

Supabase Realtime Invalid Realtime Configuration

The configuration settings for Supabase Realtime are not valid.

Supabase Realtime Event Queue Overflow

The event queue has exceeded its capacity, leading to dropped events.

Supabase Realtime Invalid Event Listener

The event listener specified is not valid or incorrectly implemented.

Supabase Realtime Invalid Subscription ID

The subscription ID provided is not valid or does not exist.

Supabase Realtime Server-Side Error

An unexpected error occurred on the server side.

Supabase Realtime Data Serialization Error

An error occurred while serializing data for transmission.

Supabase Realtime Client-Side Throttling

The client is being throttled due to excessive requests.

Supabase Realtime Invalid Event Data

The data associated with an event is not valid or incomplete.

Supabase Realtime Database Trigger Error

An error occurred while executing a database trigger associated with a Realtime event.

Supabase Realtime Server Response Timeout

The server took too long to respond to a request.

Supabase Realtime Invalid Subscription Path

The path specified for the subscription is not valid.

Supabase Realtime Event Handling Error

An error occurred while processing an event on the client side.

Supabase Realtime Invalid Channel Topic

The topic specified for the channel is not valid.

Supabase Realtime WebSocket Connection Error

The WebSocket connection to the server failed to establish.

Supabase Realtime Invalid Event Filter

The filter applied to events is not valid or incorrectly formatted.

Supabase Realtime Data Inconsistency

There are discrepancies between the data on the client and server.

Supabase Realtime Server Downtime

The Supabase Realtime server is temporarily unavailable due to maintenance or an outage.

Supabase Realtime Duplicate Event Handling

The client is processing the same event multiple times.

Supabase Realtime Invalid Subscription Parameters

The parameters provided for the subscription are invalid or incomplete.

Supabase Realtime Channel Not Found

The specified channel does not exist on the server.

Supabase Realtime CORS Policy Error

The request is blocked due to Cross-Origin Resource Sharing (CORS) policy restrictions.

Supabase Realtime Network Error

A general network error is preventing communication with the Supabase Realtime server.

Supabase Realtime Invalid JSON Response

The server response is not a valid JSON object.

Supabase Realtime Rate Limit Exceeded

The client has exceeded the allowed number of requests in a given time period.

Supabase Realtime Data Sync Delay

There is a noticeable delay in data synchronization between the client and server.

Supabase Realtime Server Overload

The Supabase Realtime server is experiencing high load and cannot process requests efficiently.

Supabase Realtime Invalid API Key error when attempting to connect to Supabase Realtime.

The API key provided is incorrect or not authorized for the requested operation.

Supabase Realtime Channel Already Subscribed

The client is attempting to subscribe to a channel that is already subscribed.

Supabase Realtime Invalid JWT Claims

The JWT token contains invalid claims that do not match the expected values.

Supabase Realtime Unsupported Event Type

The event type specified is not supported by Supabase Realtime.

Supabase Realtime SSL Certificate Error

The SSL certificate used by the server is invalid or expired.

Supabase Realtime Invalid Event Payload

The event payload received does not match the expected format.

Supabase Realtime Subscription Limit Exceeded

The number of active subscriptions has exceeded the allowed limit.

Supabase Realtime 403 Forbidden

The client does not have permission to access the requested resource.

Supabase Realtime Connection Timeout

The client is unable to establish a connection with the Supabase Realtime server within the expected time frame.

Supabase Realtime Disconnected from Server

The connection to the Supabase Realtime server was lost.

Supabase Realtime Invalid Channel Name

The channel name used for subscribing to events is not valid.

Supabase Realtime Authentication Failed

Invalid or expired JWT token used for authentication.

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