Not sure if this is the recommended way, but I managed to use plugin JARs with Solr Cloud.
Either include the absolute path to JAR in solrconfig.xml, or put the JAR in a "lib" folder relative to your instanceDir. See the following text from solrconfig.xml. If a "./lib" directory exists in your instanceDir, all files found in it are included as if you had used the following syntax... <lib dir="./lib" /> If you modified the solrconfig.xml or other config files, remember to upload it into Solr using the ConfigSet API or via command line tools. And create a collection that uses the custom configset. Hope this helps. On Fri, 19 Jul 2019 at 09:20, Richard Walker <richard.wal...@ardc.edu.au> wrote: > On 16 Jul 2019, at 4:14 pm, Richard Walker <richard.wal...@ardc.edu.au> > wrote: > > ... > > > > To be specific, I'm trying to use this idea: > > > > "Resources and plugins may be stored: > > • in ZooKeeper under a collection’s configset node (SolrCloud only);" > > > > ... > > > > So far, so good. But now how do I refer to the JAR in solrconfig.xml? > > The user guide doesn't really say. > > > > ... > > > > No success at all; I only get a ClassNotFoundException > > for the plugin class. > > > > ... > > I've now found this earlier thread: > > > http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201701.mbox/%3ccakhkodqv-y59+7m86ogvf1feqj6ieiogp8trhl1mg5fuajl...@mail.gmail.com%3e > > in which the second message (from Shawn Heisey) says: > > > I actually do not know what the path for lib directives is relative to > > when running SolrCloud. Most things in a core config are relative to > > the location of the config file itself, but in this case, the config > > file is not on the filesystem at all, it's in zookeeper, and I don't > > think Solr can use jars in zookeeper. > > So is this the definitive answer? As I suggested in my > earlier message, the documentation in the user guide at > https://lucene.apache.org/solr/guide/8_1/resource-and-plugin-loading.html > strongly suggests that you _can_ use plugin JARs uploaded > to a collection's znode. > > Richard. > >
