argoproj / argoproj/argo-workflows

Paginate/compress VERY large workflows so they can travel through gRPC

Open
#5,432 9 comments 5 reactions 0 assignees View on GitHub
area/api
Dominant language
Go
Stars
17k
Forks
3.7k
Avg merge
1d 20h
Merged PRs (30d)
138

Description

## Summary

A user is experiencing an issue when querying for a VERY large workflow (135k+ nodes) using the API.

```
curl http://localhost:2747/api/v1/workflow-events/pre-production-testing-1?listOptions.fieldSelector=metadata.name=otpgal-gqpcf
{"error":{"grpc_code":8,"http_code":429,"message":"trying to send message larger than max (296376209 vs. 104857600)","http_status":"Too Many Requests"}}
```

This message limit is placed by gRPC. We should find a way to compress/paginate or otherwise modify the message so it's able to travel over gRPC. At the very least we should provide a reasonable error to this problem.

Note that this only affects sending workflows over the API. CLI and execution are fully unaffected.

## Diagnostics

What Kubernetes provider are you using?

All platforms

What version of Argo Workflows are you running?

All versions

---

**Message from the maintainers**:

Impacted by this bug? Give it a 👍. We prioritise the issues with the most 👍.

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the API request for a workflow with 135k+ nodes and tracing where the gRPC maximum-message error occurs. Done means large workflows can travel through the API via compression or pagination, or the API returns a reasonable error when they cannot; CLI and execution must remain unaffected.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, grpc
Domain
api, backend
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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