Depends if they do breaking changes in common-lang or not. By using an old version of a library such as common-lang you may introduce security issues in your setup.
> Am 13.08.2019 um 06:12 schrieb Zheng Lin Edwin Yeo <edwinye...@gmail.com>: > > I have found that the Lingo3GClusteringAlgorithm will work if I copied > the commons-lang-2.6.jar from the previous version to > solr-8.2.0\server\solr-webapp\webapp\WEB-INF\lib. > > Will this work in the long run? Because our lingo3g licence is not eligible > to download the latest version of 1.16, so we are currently stuck with the > older version 1.15.1, which still uses commons-lang dependency. > > Regards, > Edwin > > On Tue, 13 Aug 2019 at 00:14, Zheng Lin Edwin Yeo <edwinye...@gmail.com> > wrote: > >> Hi Kevin, >> >> Thanks for the info. >> >> I think should be lingo3g problem. The problem occurs when I use >> Lingo3GClusteringAlgorithm. >> <str >> name="carrot.algorithm">com.carrotsearch.lingo3g.Lingo3GClusteringAlgorithm</str> >> >> If I change back to LingoClusteringAlgorithm, it will work. >> <str >> name="carrot.algorithm">org.carrot2.clustering.lingo.LingoClusteringAlgorithm</str> >> >> Regards, >> Edwin >> >>> On Fri, 9 Aug 2019 at 10:59, Kevin Risden <kris...@apache.org> wrote: >>> >>> According to the stack trace: >>> >>> java.lang.NoClassDefFoundError: org/apache/commons/lang/ObjectUtils >>> at lingo3g.s.hashCode(Unknown Source) >>> >>> It looks like lingo3g - lingo3g isn't on Maven central and looks like it >>> requires a license to download. You would have to contact them to see if >>> it >>> still uses commons-lang. You could also copy in commons-lang dependency. >>> >>> Kevin Risden >>> >>> >>> On Thu, Aug 8, 2019 at 10:23 PM Zheng Lin Edwin Yeo <edwinye...@gmail.com >>>> >>> wrote: >>> >>>> 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 >>>>> >>>>> >>>> >>> >>
