In case of solr4 which uses log4j-1.2.17.jar, the "log4j2.formatMsgNoLookups=true" system property is neither required nor applicable. In fact, the property was only introduced in log4j-2.10 (refer to the JIRA below). So not just Solr, but any Java application using 2<= log4j <2.10 will not be helped by this system property.
https://issues.apache.org/jira/browse/LOG4J2-2109 On Sat, Dec 11, 2021 at 11:04 PM Raveendra Yerraguntla <raveend...@yahoo.com.invalid> wrote: > > - -Dlog4j2.formatMsgNoLookups=true > > > restart jvm with the above param and should work. > > > > > > On Saturday, December 11, 2021, 09:51:54 PM EST, Reej Nayagam < > reej...@gmail.com> wrote: > > Hi All, > > In production we are using solr4 which uses log4j-1.2.17.jar. > > Can someone say the mitigation option for solr4 > > Thanks > Reej > -- > *Thanks,* > *Reej* >
