Discord Error Code 4015 Stream Ended: How to Recover

When you try to join a Discord voice channel or start a screen share, you may see the message “Stream Ended” with error code 4015. This error appears because Discord cannot maintain a stable connection to the voice server or stream relay. The problem often stems from network interruptions, outdated voice settings, or corrupted local data. This article explains the root cause of error 4015 and provides clear steps to recover your stream.

Why Discord Error Code 4015 Appears

Error code 4015 signals that Discord’s voice or stream server closed the connection unexpectedly. The most common technical cause is a network timeout. Discord uses UDP packets for real-time voice and video. If your router or firewall drops these packets, the server assumes the stream ended and sends error 4015. Other causes include:

• Outdated or corrupted Discord installation files
• Conflicting Quality of Service (QoS) settings that overload your router
• Antivirus or VPN software blocking Discord’s voice ports
• Corrupted Discord cache files that store broken stream state

The error is not a permanent ban or account issue. It only affects the current voice or stream session. Once you fix the underlying connection problem, you can rejoin the channel.

How Discord’s Stream Protocol Works

When you start a stream or join a voice channel, Discord opens a persistent WebRTC connection using STUN and TURN servers. The server assigns a unique session ID. If the client does not send keep-alive packets within 10 seconds, the server terminates the session and returns error 4015. This timeout behavior is by design to free server resources, but it can trigger prematurely on unstable networks.

Steps to Recover From Discord Error Code 4015

Follow these steps in order. Test your stream after each step to see if the error clears.

Step 1: Reset Discord Voice Settings

1. Open User Settings
   Click the gear icon next to your username at the bottom of the Discord window.
2. Go to Voice & Video
   In the left sidebar, select Voice & Video under App Settings.
3. Scroll to the bottom of the page
   Find the section labeled “Voice Settings” and click the button “Reset Voice Settings”.
4. Confirm the reset
   A pop-up asks if you are sure. Click “Okay”. Discord restores all audio and network settings to defaults.
5. Rejoin the voice channel
   Try starting your stream again. If error 4015 persists, proceed to Step 2.

Step 2: Disable Quality of Service High Packet Priority

1. Open User Settings
   Click the gear icon next to your username.
2. Go to Voice & Video
   Select Voice & Video from the left sidebar.
3. Scroll to the Quality of Service section
   Look for the toggle labeled “Enable Quality of Service High Packet Priority”.
4. Turn off the toggle
   Click the toggle so it becomes gray. This disables Discord’s QoS tagging.
5. Restart Discord
   Close Discord completely and reopen it. Join a voice channel and test your stream.

Step 3: Clear Discord Cache

1. Close Discord completely
   Right-click the Discord icon in the system tray and select “Quit Discord”. Confirm in Task Manager that no Discord processes remain.
2. Open the Run dialog
   Press Windows key + R on your keyboard.
3. Type the AppData path
   In the Run box, type %appdata%/discord and press Enter. File Explorer opens to the Discord folder.
4. Delete the Cache, Code Cache, and GPUCache folders
   Select these three folders, right-click, and choose “Delete”. Do not delete the main Discord folder.
5. Empty the Recycle Bin
   Right-click the Recycle Bin on your desktop and select “Empty Recycle Bin”.
6. Restart Discord
   Open Discord again. It re-creates the cache folders automatically. Try your stream.

Step 4: Check Firewall and Antivirus Settings

1. Open Windows Security
   Press the Start button, type “Windows Security”, and open the app.
2. Go to Firewall & network protection
   Click “Firewall & network protection” in the left menu.
3. Click Allow an app through firewall
   Under “Allow an app through firewall”, click the link.
4. Find Discord in the list
   Scroll to Discord. Ensure both Private and Public checkboxes are checked. If Discord is missing, click “Change settings” then “Allow another app” and browse to %localappdata%/Discord/app-1.0.9015/Discord.exe.
5. Restart Discord and test
   Close and reopen Discord. Join a voice channel and start your stream.

Step 5: Run Discord as Administrator

1. Right-click the Discord shortcut
   On your desktop or Start menu, right-click the Discord icon.
2. Select Properties
   Click “Properties” at the bottom of the context menu.
3. Go to the Compatibility tab
   In the Properties window, click the Compatibility tab.
4. Check Run this program as an administrator
   Under Settings, check the box labeled “Run this program as an administrator”.
5. Click Apply then OK
   Save the changes. Launch Discord and test your stream.

If Discord Still Shows Error 4015 After the Main Fix

If the error persists after following all steps above, the problem may be on your network or ISP side. Below are two additional scenarios and their fixes.

Error 4015 Only on Wi-Fi but Works on Ethernet

Wi-Fi connections are more prone to packet loss than wired Ethernet. If error 4015 occurs only when you are on Wi-Fi, try these changes:

1. Switch to a 5 GHz Wi-Fi band
   Open your router settings and select the 5 GHz band instead of 2.4 GHz. 5 GHz offers lower interference.
2. Change your DNS server
   Set your DNS to Cloudflare (1.1.1.1 and 1.0.0.1) or Google (8.8.8.8 and 8.8.4.4). This can reduce routing timeouts.
3. Update your Wi-Fi adapter driver
   Open Device Manager, expand Network adapters, right-click your Wi-Fi adapter, and select “Update driver”.

Error 4015 After Windows Update

A Windows update can change network settings or break Discord’s dependencies. To fix this:

1. Reinstall Discord
   Uninstall Discord from Control Panel > Programs > Uninstall a program. Then download the latest installer from discord.com and install it fresh.
2. Disable IPv6 on your network adapter
   Open Control Panel > Network and Sharing Center > Change adapter settings. Right-click your active connection, select Properties, uncheck “Internet Protocol Version 6 (TCP/IPv6)”, and click OK.

Discord Voice Connection Types: UDP vs TCP Fallback

Item	UDP (Default)	TCP Fallback
Description	Direct real-time connection with low latency	Connection through relay servers with higher latency
Latency	Low (under 50 ms typical)	Higher (100–300 ms typical)
Packet loss handling	No retransmission; lost packets cause audio gaps	Retransmits lost packets, causing delays
Error 4015 frequency	More common on unstable networks	Less common but stream quality drops
When to use	Stable wired or strong Wi-Fi	Networks that block UDP (public Wi-Fi, VPNs)

Discord automatically falls back to TCP if UDP is blocked. You can force the fallback by disabling “Enable Quality of Service High Packet Priority” and restarting Discord. This reduces error 4015 on restrictive networks.

After following the steps in this article, you can rejoin any voice channel and start a stream without seeing error 4015. The key fixes are resetting voice settings, disabling QoS, and clearing the cache. If the error returns on a specific network, switch to a wired connection or use a VPN that does not block Discord’s voice ports. For advanced users, you can also add Discord’s IP ranges to your firewall whitelist to prevent future timeouts.