Hi Erick, Thanks for your reply.
My clustering code is taken as it is from the Solr package, only the codes related to lingo3g is taken from previous version. Below are the 3 files that I have taken from previous version: - lingo3g-1.15.0 - morfologik-fsa-2.1.1 - morfologik-stemming-2.1.1 Does anyone of these could have caused the error? Regards, Edwin On Thu, 8 Aug 2019 at 19:56, Erick Erickson <erickerick...@gmail.com> wrote: > This dependency was removed as part of > https://issues.apache.org/jira/browse/SOLR-9079, so my guess is you’re > pointing to an old version of the clustering code. > > Best, > Erick > > > On Aug 8, 2019, at 4:22 AM, Zheng Lin Edwin Yeo <edwinye...@gmail.com> > wrote: > > > > ObjectUtils > >