JBoss EAP 7.4 Configuration Guide
17.4.1.1. Standard Access Logging Table 17.1. Available patterns

The following patterns are missing from the table:

• %S : Request session ID
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• %o: Obfuscated remote IP address, removing the last IPv4 byte or anything after the second colon (IPv6), ie. "1.2.3." or "fe08:2:"
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  • Added by UNDERTOW-1495, JBoss EAP 7.2.1
• %R: forwarded relative path. If the request is forwarded by RequestDispacher, %R outputs the forwarded path relative to the context root, not the original request URL path as %U. If the request is not forwarded, it outputs the original request path relative to the context root.
  • source code