Handle jolokia connection failure and extending delay when connection errors

[phantomjinx]

• fix: Handle jolokia probe failure (#354)

  • managed-pod.ts
  • Extends the error property of Management to store more detail of errors, ie. messsage and http code
  • error property returned to undefined upon successful connection
  • Modifies the probe function to store the errors that may be generated
  • management-service.ts
  • Moves search into managed-pod
  • DiscoverPodConnect.tsx
  • Adds Error section to display error failure
  • Disables the connect button if a mgmt error has occurred
  • DiscoverPodItem.tsx
  • If error has occurred then display 'unknown routes' label

• fix: Extends the delay in polling for pods in error

  • If a pod cannot be connected to then it has a mgmt error. In that case don't keep polling it every 2 seconds but double the delay before trying to connect again.
  • managed-pod.ts
  • Adds error polling state for storing both the polling count and the threshold
  • management-service.ts
  • If the pod has a management error then increment the error poll count and its threshold to increasingly delay before trying again
  • Once it does poll and successfully connects then resets the error poll count

[phantomjinx]

Take note of this comment

[phantomjinx]

Revision of error handling in Discover component

• Alert is displayed on display of Discover for each pod error
• Clicking the Notification Badge will re-display the pod error