ntly or temporarily unavailable.

 <p>
 When a servlet or filter is permanently unavailable, something is wrong with it, and it cannot handle requests until
 some action is taken. For example, a servlet might be configured incorrectly, or a filter's state may be corrupted.
 The component should log both the error and the corrective action that is needed.

 <p>
 A servlet or filter is temporarily unavailable if it cannot handle requests momentarily due to some system-wide
 problem. For example, a third-tier 