SSE notifications stop after about 5-6 times when using kafka-sse

[marcinkorda]

Describe the bug

SSE notifications stop after about 5-6 times if a live stream reading is configured.

To Reproduce
Steps to reproduce the behavior:

1. Copy example configuration from https://docs.aklivity.io/zilla/latest/tutorials/sse/sse-intro.html
2. In zilla.yaml replace

  south_kafka_cache_server:
    type: kafka
    kind: cache_server
    options:
      bootstrap:
        - events
    exit: south_kafka_client

with

  south_kafka_cache_server:
    type: kafka
    kind: cache_server
    options:
      bootstrap:
        - events
      topics:
        - name: events
          defaultOffset: live
    exit: south_kafka_client

3. Run docker compose and follow instructions from https://docs.aklivity.io/zilla/latest/tutorials/sse/sse-intro.html
4. After 5-6 times you will notice that there is no update on web page despite the fact that kafka is producing new messages.

Expected behavior
New messages are seen on web page.

Zilla Environment:
Describe the Host environment including:

• Zilla start command: docker compose up -d
• Environment variables: none

Describe a docker container:

{
  "Hostname": "50341202a83b",
  "Domainname": "",
  "User": "",
  "AttachStdin": false,
  "AttachStdout": true,
  "AttachStderr": true,
  "ExposedPorts": {
    "7114/tcp": {}
  },
  "Tty": false,
  "OpenStdin": false,
  "StdinOnce": false,
  "Env": [
    "KAFKA_BOOTSTRAP_SERVER=kafka:29092",
    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
    "ZILLA_VERSION=0.9.97"
  ],
  "Cmd": [
    "start",
    "-v",
    "-e"
  ],
  "Image": "ghcr.io/aklivity/zilla:latest",
  "Volumes": null,
  "WorkingDir": "",
  "Entrypoint": [
    "/opt/zilla/zilla"
  ],
  "OnBuild": null,
  "Labels": {
    "com.docker.compose.config-hash": "1646fa3138ec69db02584c69f25782b3a02f77a72f4084a88b7efa504b523acd",
    "com.docker.compose.container-number": "1",
    "com.docker.compose.depends_on": "kafka:service_started:false",
    "com.docker.compose.image": "sha256:5ae7059361b22ea7447525d814e1982a883c690e98635bf57726cec08ea94041",
    "com.docker.compose.oneoff": "False",
    "com.docker.compose.project": "zilla",
    "com.docker.compose.project.config_files": "/root/wsl_repos/zilla/docker-compose.yaml",
    "com.docker.compose.project.working_dir": "/root/wsl_repos/zilla",
    "com.docker.compose.service": "zilla",
    "com.docker.compose.version": "2.26.1",
    "org.opencontainers.image.ref.name": "ubuntu",
    "org.opencontainers.image.version": "22.04"
  }
}

Attach the zilla.yaml config file:
zilla_yaml.txt

Attach the zilla dump pcap file:
zilla_pcap.zip

[bmaidics]

This issue only reproduces at defaultOffset = live. The fix for this is ready, we'll notify when you when the new release is ready. Thanks for opening this issue.