The blob store api is indeed severely limited (near useless) by this:
On Thu, Aug 10, 2017 at 4:08 PM, Webster Homer <webster.ho...@sial.com>
> I have a need to override the default behavior of the BM25Similarty class.
> It was trivial to create the class. My problem is that I cannot load it, at
> least via the blob api as described here:
> I set enable.runtime.lib=true on my solr startup
> I created the .system collection and uploaded a jar containing my class
> following the instructions here:
> I can see that the blob was created.
> I added the runtime lib to my collection, and I can see it in the
> configorelay.json file
> Finally I added this line to the schema.xml file:
> <similarity class="com.sial.similarity.SialBM25Similarity"
> uploaded it to Zookeeper and reloaded the collection. only to get this
> Could not load conf for core test-catalog-product-170724_shard1_replica1:
> Can't load schema schema.xml: Error loading class 'com.sial.similarity.
> What am I missing? Is this plugins api limited to components and request
> handlers? If so that's a HUGE limitation, makes it just about useless.
> I need it for this similarity and some filter factories, and having a
> simple way to deploy code to solrcloud nodes that can be easily automated
> would be great.
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