Hi, We're working on rolling out a far newer instance of Solr using SolrCloud than what we currently have in Production.
In our Dev environment, we had set up Solr 6.3.0. Over the last couple of weeks, the Ops team has been test driving SolrCloud and the resiliency/failover, while our Dev team has been working on coding to the SolrCloud API as well as tweaking the Data Import. I upgraded Solr 6.3.0 this morning to 6.4.0. All seemed good according to the logs but this afternoon we discovered that the DataImport tabs in our Collections now say: 'Sorry, no dataimport-handler defined!'. This was working before the upgrade so I'm guessing I missed something. We turned on 'ALL' logging and still didn't see anything indicative of what might be causing this. But I'll keep looking. I did notice that http://<hostname>:8983/solr/#/~java-properties I don't see the dataimporthandler jar files included in the classpath. However the solr. install. dir is defined as /opt/solr and in solrconfig.xml there's this <lib dir="${solr.install.dir:../../../..}/dist/" regex="solr-dataimporthandler-.*\.jar" /> seems like too many ../. But I'm not sure. Anyway, I'll keep looking at the logs for clues but I'm being asked to downgrade to Solr 6.3.0, which I'd obviously not do. Thanks in advance for your time, Dan