==> /opt/lucee/tomcat/logs/catalina.out <==
28-Oct-2015 08:28:49.806 INFO [http-nio-8888-exec-1] org.apache.solr.client.solrj.impl.HttpClientUtil.createClient Creating new http client, config:maxConnections=128&maxConnectionsPerHost=32&followRedirects=false
log4j:ERROR A "org.apache.log4j.RollingFileAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [com.compoundtheory.classloader.NetworkClassLoader@6ba96347] whereas object of type
log4j:ERROR "org.apache.log4j.RollingFileAppender" was loaded by [java.net.URLClassLoader@61e4705b].
log4j:ERROR Could not instantiate appender named "file".
28-Oct-2015 08:28:50.052 INFO [http-nio-8888-exec-1] org.apache.solr.client.solrj.impl.HttpClientUtil.createClient Creating new http client, config:maxConnections=128&maxConnectionsPerHost=32&followRedirects=false
==> /opt/lucee/tomcat/logs/catalina.out <==
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/var/www/vmhost/apps/mysite/cfml/deployment_root/wwwroot/requirements/solrj/javalib/slf4j-jdk14-1.6.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/var/www/vmhost/apps/mysite/cfml/deployment_root/wwwroot/requirements/solrj/javalib/tika-app-1.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]
28-Oct-2015 09:27:53.336 INFO [http-nio-8888-exec-1] org.apache.solr.client.solrj.impl.HttpClientUtil.createClient Creating new http client, config:maxConnections=128&maxConnectionsPerHost=32&followRedirects=false
28-Oct-2015 09:27:53.505 INFO [http-nio-8888-exec-1] org.apache.solr.client.solrj.impl.HttpClientUtil.createClient Creating new http client, config:maxConnections=128&maxConnectionsPerHost=32&followRedirects=false
It seems not completely clean (hence the "multiple bindings" message), so maybe there's still a tweak to be made, but I guess it's better than errors.
Is it time to branch for an old (ACF9-compatible) version and move on with upgrades?