Cluster Issues

Cluster Issues

Cluster Creation Failed

  1. Check the CloudFormation stack events in PCUI for specific error messages
  2. Verify your subnet ID and networking configuration
  3. Ensure your account has sufficient service quotas for the requested instance types
  4. Try a Dry Run in PCUI before deploying to catch config errors

Cluster Stuck in Creating

  • Cluster creation typically takes 10-15 minutes
  • Check CloudFormation events for progress
  • If stuck for more than 30 minutes, check for errors and contact support

Cluster Won’t Delete

  1. Check for running jobs — cancel them first with scancel
  2. Check CloudFormation stack events for deletion errors
  3. Contact support if the stack is stuck in DELETE_FAILED

Compute Nodes Not Launching

  • Check that your MaxCount is greater than 0
  • Verify the instance type is available in your region
  • Check service quotas for the requested instance type
  • Review /var/log/parallelcluster/ logs on the head node