# Failed to execute 'appendBuffer' on 'SourceBuffer'

**URL:** <https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer/49786>\
**Category:** Wowza Developer Dojo\
**Created:** [September 29, 2017, 3:46pm UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer/49786 "2017-09-29T15:46:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Chris\_Jerrett](https://avatars.discourse-cdn.com/v4/letter/c/51bf81/32.png) [@Chris\_Jerrett](https://community.wowza.com/u/Chris_Jerrett)\
**Post date:** [September 29, 2017, 3:46pm UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer/49786/1 "2017-09-29T15:46:34Z")

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When using the Wowza Player the player stops and throws the error, “Failed to execute ‘appendBuffer’ on ‘SourceBuffer’” the full trace is below. The player also constantly prints, “INFO: PlayerStreamer: - DRAIN init video.” Thanks for your help in advance.

Uncaught DOMException: Failed to execute ‘appendBuffer’ on ‘SourceBuffer’: The SourceBuffer is full, and cannot free space to append additional buffers. at v6ZS.appendNextAudioChunkWork ([http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1104816](http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1104816)) at [http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1105506](http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1105506) at v6ZS.waitForUpdateEnd ([http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1106945](http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1106945)) at v6ZS.appendNextAudioChunk ([http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1105450](http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1105450)) at [http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1114085](http://player.wowza.com/player/latest/js/wowzaplayer.js:1:1114085) v6ZS.appendNextAudioChunkWork @ wowzaplayer.js:1 (anonymous) @ wowzaplayer.js:1 v6ZS.waitForUpdateEnd @ wowzaplayer.js:1 v6ZS.appendNextAudioChunk @ wowzaplayer.js:1 (anonymous) @ wowzaplayer.js:1 setTimeout (async) (anonymous) @ wowzaplayer.js:1

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**Author:** ![Kenny\_Stone](https://avatars.discourse-cdn.com/v4/letter/k/ec9cab/32.png) [@Kenny\_Stone](https://community.wowza.com/u/Kenny_Stone)\
**Post date:** [October 26, 2017, 1:41am UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer/49786/2 "2017-10-26T01:41:23Z")

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Hey Chris,

Were you able to fix this? What is your environment like?

I see the same thing. I have a react environment, and I’m connecting to the ultra-low latency preview.

Kenny