[kroki]: Cannot render large diagram with Error 400: Internal Server

[al-cheb]

Config docker-compose.yaml

services:
  core:
    image: yuzutech/kroki
    environment:
      - KROKI_DIAGRAMSNET_HOST=diagramsnet
      - KROKI_MAX_URI_LENGTH=8192
      - KROKI_CONVERT_TIMEOUT=45s
      - KROKI_COMMAND_TIMEOUT=5s
    ports:
      - "8000:8000"
    deploy:
      resources:
        limits:
          memory: 512M
        reservations:
          cpus: 50
          memory: 512M
  diagramsnet:
    image: yuzutech/kroki-diagramsnet
    environment:
      - KROKI_MAX_BODY_SIZE=5mb
    deploy:
      resources:
        limits:
          memory: 256M
        reservations:
          cpus: 50
          memory: 256M
    ports:
      - "8005:8005"
    expose:
      - "8005"

How to reproduce:

$ curl -v http://localhost:8000/diagramsnet/svg --data-binary '@spark.drawio.txt'

> POST /diagramsnet/svg HTTP/1.1
> Host: localhost:8000
> User-Agent: curl/8.5.0
> Accept: */*
> Content-Length: 1672439
> Content-Type: application/x-www-form-urlencoded
> Expect: 100-continue
> 
< HTTP/1.1 100 Continue
* We are completely uploaded and fine
< HTTP/1.1 400 Internal Server Error
< content-type: text/plain
< content-length: 32
< 
* Connection #0 to host localhost left intact
Error 400: Internal Server

Logs:

$ docker logs a358ebe39b0f
{
  "timestamp": "1739433275254",
  "level": "WARN",
  "thread": "vert.x-eventloop-thread-1",
  "mdc": {
    "error_message": "Internal Server Error",
    "path": "/diagramsnet/svg",
    "method": "POST",
    "action": "warning",
    "error_code": "400",
    "failure_class_name": "io.netty.handler.codec.http.multipart.HttpPostRequestDecoder$TooLongFormFieldException",
    "user_agent": "curl/8.5.0"
  },
  "logger": "io.kroki.server.error.ErrorHandler",
  "message": "Bad request",
  "context": "default"
}

The direct request to diagramsnet service works without issue:

$ curl -v http://localhost:8005/svg --data-binary '@spark.drawio.txt'

What did you expect to see?
A diagram should be rendered without errors.

[al-cheb]

@ggrossetie, hey, any ideas?

[ggrossetie]

Probably related to netty/netty#14125

[al-cheb]

Probably related to netty/netty#14125

@ggrossetie, any plans to bump up a lib version and publish new image?

[ggrossetie]

Just released 0.27.0, could you give it a try?

[al-cheb]

@ggrossetie, unfortunately no luck.

$ docker ps
CONTAINER ID   IMAGE                               COMMAND                  CREATED          STATUS          PORTS                                         NAMES
c1a589a21fc4   yuzutech/kroki:0.27.0               "/bin/sh -c 'exec ja…"   43 seconds ago   Up 42 seconds   0.0.0.0:8000->8000/tcp, [::]:8000->8000/tcp   desktop-core-1
efb080eb29cb   yuzutech/kroki-diagramsnet:0.27.0   "node src/index.js"      43 seconds ago   Up 42 seconds   0.0.0.0:8005->8005/tcp, [::]:8005->8005/tcp   desktop-diagramsnet-1

$ docker logs c1a589a21fc4
{
  "timestamp": "1740130772870",
  "level": "INFO",
  "thread": "vert.x-eventloop-thread-0",
  "logger": "io.vertx.core.impl.launcher.commands.VertxIsolatedDeployer",
  "message": "Succeeded in deploying verticle",
  "context": "default"
}
{
  "timestamp": "1740130788154",
  "level": "WARN",
  "thread": "vert.x-eventloop-thread-1",
  "mdc": {
    "error_message": "Internal Server Error",
    "path": "/diagramsnet/svg",
    "method": "POST",
    "action": "warning",
    "error_code": "400",
    "failure_class_name": "io.netty.handler.codec.http.multipart.HttpPostRequestDecoder$TooLongFormFieldException",
    "user_agent": "curl/8.5.0"
  },
  "logger": "io.kroki.server.error.ErrorHandler",
  "message": "Bad request",
  "context": "default"
}
{
  "timestamp": "1740130806705",
  "level": "WARN",
  "thread": "vert.x-eventloop-thread-1",
  "mdc": {
    "error_message": "Internal Server Error",
    "path": "/diagramsnet/svg",
    "method": "POST",
    "action": "warning",
    "error_code": "400",
    "failure_class_name": "io.netty.handler.codec.http.multipart.HttpPostRequestDecoder$TooLongFormFieldException",
    "user_agent": "curl/8.5.0"
  },
  "logger": "io.kroki.server.error.ErrorHandler",
  "message": "Bad request",
  "context": "default"
}

[al-cheb]

Example file - spark.drawio.txt