The iis exchange parsing for IPv6 fails to work correctly

[ishleenk17]

For IPv6 as the source and destination address the access log parsing fails to happen correctly.
Below are some of the successful and failure testcases. The issue is seen in both beats and integrations

Successful Scenario

2022-03-13 02:04:11 10.44.0.136 GET /pbserver/..Áœ..Áœ..Áœ..Áœ..Áœ../winnt/system32/cmd.exe /c+dir+c:+/OG 8080 - 10.44.0.136 Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0) - 200 0 0 12 216.160.83.61,81.2.69.193

Failure Scenarios

2022-03-13 02:04:11 fe81::63ae:94c0:196e:8adf%3 GET /pbserver/..Áœ..Áœ..Áœ..Áœ..Áœ../winnt/system32/cmd.exe /c+dir+c:+/OG 8080 - fe81::63ae:94c0:196e:8adf%3 Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0) - 200 0 0 12 81.2.69.143,81.2.69.144

2022-03-13 02:04:11 fe81::63ae:94c0:196e:8adf%3 GET /pbserver/..Áœ..Áœ..Áœ..Áœ..Áœ../winnt/system32/cmd.exe /c+dir+c:+/OG 8080 - fe81::63ae:94c0:196e:8adf%3 Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0) - 200 0 0 12 67.43.156.15

Pipeline Test Results:

Run pipeline tests for the package
--- Test results for package: iis - START ---
FAILURE DETAILS:
iis/access test-iis-access-72.log:
[0] unexpected pipeline error: For input string: "67.43"
[1] unexpected pipeline error: For input string: "81.2"

[ishleenk17]

2022-03-13 02:04:11 fe81::63ae:94c0:196e:8adf%3 GET /pbserver/..Áœ..Áœ..Áœ..Áœ..Áœ../winnt/system32/cmd.exe /c+dir+c:+/OG 8080 - fe81::63ae:94c0:196e:8adf%3 Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0) - 200 0 0 12

This log doesn't give error. Here source and destination are IPv6, but there are no IP's towards the end of the logs.