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How to collect ECS logs to diagnose Quilt platform issues

Collect recent ECS log events to help diagnose backend errors in the Quilt platform. This enables support to trace issues such as failed services, misconfigurations, or timeouts.

Symptoms

Errors occur during Quilt usage, but the root cause is not visible in the UI.

  • UI appears stuck or unresponsive
  • Failed API calls
  • Timeouts or unexpected behavior during login, navigation, or data access

Likely Causes

  • Server-side error or crash
  • Misconfigured AWS ECS stack
  • CloudWatch not receiving logs due to permission or setup issues

Recommendation

  1. Identify the name of your Quilt ECS stack:

    aws cloudformation list-stacks

  2. Set your stack name in a shell variable:

    STACK_NAME="YOUR_QUILT_STACK"

  3. Collect ECS logs for the past 30 minutes:

    aws logs filter-log-events \
      --log-group-name "$STACK_NAME" \
      --start-time "$(( ($(date +%s) - 1800) * 1000 ))" \
      --end-time "$(( $(date +%s) * 1000 ))" > log-quilt-ecs-events.json

  4. Share the resulting log-quilt-ecs-events.json file with Quilt support for analysis.