Getting "Failed to create session: 500" when trying to start containers
Hi! I'm trying to use Cloudflare Containers with the @cloudflare/sandbox SDK but getting a
"Failed to create session: 500" error when my Worker tries to start a container.
What's working:
- wrangler deploy succeeds ✓
- Container image builds and pushes successfully ✓
- Container application registered (Application ID: a033a220-ac81-4d51-8105-0427956c4828) ✓
- Worker code runs fine ✓
What's failing:
- When I call sandbox.writeFile() or any sandbox operation, it fails with:
Job failed: Failed to create session: 500
- The sandbox handle is created successfully, but the actual container won't start
1 Reply
I ran into a similar issue, see https://discord.com/channels/595317990191398933/1387061528016195684/1427777612524163163
I get the 'failed to create session' before, on
exec but it might just be whatever API call is made first.
@Sunil Pai does this sound in any way plausible to you? Happy to help with more info/debugging but don't know where to start at this point
Investigated a bit more, seems like instance_type must be set to at least basic.