I have defined a realm in tomcat 7
<Realm className="hasan.realm.MyRealm"
dataSourceName="jdbc/MyDb"
algorithm="MD5"
secureDataFilePath="${catalina.home}/set/users.xml"
secureDataSalt="lsi9435fmc9043593mv387cm03298"
userTable="User" userNameCol="username" userCredCol="password"
userRoleTable="Roles" roleNameCol="role">
<CredentialHandler className="org.apache.catalina.realm.MessageDigestCredentialHandler" algorithm="MD5"/>
</Realm>
In Tomcat 8.5, I get the warning:
08-Sep-2017 08:46:15.822 WARNUNG [main] org.apache.tomcat.util.digester.SetPropertiesRule.begin [SetPropertiesRule]{Server/Service/Engine/Host/Realm} Setting property 'algorithm' to 'MD5' did not find a matching property.
It's probably too late for this to be useful, but I came across the same issue today, so maybe it'll be of use to someone in the future.
The warning refers to the
algorithm="MD5"
property that you set on theRealm
itself - that property has been removed in Tomcat 8.5 in favor of using aCredentialHandler
element like you were already doing in your example.