text: Title: Unknown error when runnnig experiments
  Body: /kind bug
  
  Got unexpected error in metric collector using file collector
  
  > F1005 06:27:13.600768      14 main.go:396] Failed to Report logs: rpc error: code = Unknown desc = Pepare SQL statement failed: Error 1390: Prepared statement contains too many placeholders
  
  The job finished properly, but showed as error in the pod status. Found the error above in the file metric collector log. How shall I debug this?
  
  The output looks like:
  ```
  
  objective: 0.716
  loss_avg: 0.716
  acc_avg: 0.500
  
  objective: 0.704
  loss_avg: 0.704
  acc_avg: 0.540
  
  Epoch eval:
  ROCAUC: 0.605
  
  Validation:
  objective: 0.671
  loss_avg: 0.671
  acc_avg: 0.605
  
  Epoch eval:
  ROCAUC: 0.609
  Validation rocauc: 0.609
  
  time(s): 67894.691
  
  ```
  
  **What did you expect to happen:**
  Works well
  
  **Anything else you would like to add:**
  There's warning above kind of related to this
  > W1005 06:27:08.292701      14 file-metricscollector.go:71] Metrics will not have timestamp since error parsing time objective:: parsing time "objective:" as "2006-01-02T15:04:05.999999999Z07:00": cannot parse "objective:" as "2006"
  W1005 06:27:08.292708      14 file-metricscollector.go:71] Metrics will not have timestamp since error parsing time Validation: parsing time "Validation" as "2006-01-02T15:04:05.999999999Z07:00": cannot parse "Validation" as "2006"
  
  
  **Environment:**
  
  - Kubeflow version (`kfctl version`): Didn't install kf
  - Minikube version (`minikube version`):
  - Kubernetes version: (use `kubectl version`): 1.20
  - OS (e.g. from `/etc/os-release`): Amazon Linux2
  