Messages generated by the resolver for the network operator notification function

If the resolver detects that a name server is not being responsive, a series of network operator messages is issued that relate to that name server. For example, if a name server is operating at IP address 10.42.35.200 and the UNRESPONSIVETHRESHOLD value is 25, then the following sequence of messages might be generated by the resolver:

At the end of a 5-minute monitoring interval, the resolver determines that the name server failed to respond to 35% of 6000 queries that were attempted by the resolver. The resolver considers the name server to be unresponsive and issues the following messages:
```
EZZ9308E UNRESPONSIVE NAME SERVER DETECTED AT IP ADDRESS 10.42.35.200
EZZ9310I NAME SERVER 10.42.35.200
     TOTAL NUMBER OF QUERIES SENT    6000
     TOTAL NUMBER OF FAILURES        2100
     PERCENTAGE                        35%
```
At the end of the next 5-minute interval, the resolver determines that the name server failed to respond to 55% of the 3000 queries that it attempted during that interval. The name server is still considered to be unresponsive, and the following message is issued:
```
EZZ9310I NAME SERVER 10.42.35.200
     TOTAL NUMBER OF QUERIES SENT    3000
     TOTAL NUMBER OF FAILURES        1650
     PERCENTAGE                        55%
```
This message and the statistical information for the name server are issued at 5-minute intervals for as long as the resolver considers the name server to be unresponsive.
At the end of a subsequent monitoring interval, the resolver determines that the name server failed to respond to 15% of the 4500 queries that the resolver attempted during the latest sliding 5-minute interval. This percentage is under the threshold value, so the resolver considers this name server to be responsive again. The resolver clears message EZZ9308E from the operator console and issues the following messages:
```
EZZ9309I NAME SERVER IS NOW RESPONSIVE AT IP ADDRESS 10.42.35.200
EZZ9310I NAME SERVER 10.42.35.200
     TOTAL NUMBER OF QUERIES SENT    4500
     TOTAL NUMBER OF FAILURES         675
     PERCENTAGE                        15%
```
The resolver also clears message EZZ9308E from the operator console if any of the following situations occur:
- The network operator disables the monitoring function using the MODIFY RESOLVER,REFRESH,SETUP command. For more information, see Steps for modifying the UNRESPONSIVETHRESHOLD value.
- The network operator enables the autonomic quiescing of unresponsive name servers function using the MODIFY RESOLVER,REFRESH,SETUP command. For more information, see Steps for modifying the UNRESPONSIVETHRESHOLD value.
- No resolver queries are sent to the name server during the current 5-minute monitoring interval.
- The network operator notification function abnormally terminates due to system error.
- The resolver is stopped.

The resolver issues individual messages for each name server that it considers to be unresponsive at the end of a given monitoring interval. Because the resolver calculates the responsiveness of a name server by using a sliding 5-minute interval, messages might be issued for different name servers at different times, rather than notifications about all unresponsive name servers being issued at the same time.