I would be interested in the answer here, as well. We're using LTR successfully on Solr 7.3 and Solr 8.3 in cloud mode, but we're struggling to load a simple, test model on 8.3 in master/slave mode. The FeatureStore appears to load, but we're not sure it's loading correctly, either. Here are some details from the engineer on our team who is leading that effort:
"I'm getting a ClassCastException when uploading a Model. Using the debugger, was able to see the line throwing the exception is: org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:488) Apparently it cannot find: org.apache.solr.ltr.model.LinearModel, although the features appear to be created without issues with the following class: org.apache.solr.ltr.feature.FieldValueFeature Another thing we were able to see is that the List<Feature> features has a list of null elements, so that made us think there may be some issues when creating the instances of Feature. We had begun to believe this might be related to the fact that we are running Solr in Master/Slave config. Was LTR ever tested on non-cloud deployments?? Any help is appreciated." Monica D Skidmore Lead Engineer, Core Search CareerBuilder.com <https://www.careerbuilder.com/> | Blog <https://www.careerbuilder.com/advice> | Press Room <https://press.careerbuilder.com/> On 7/24/20, 7:58 AM, "Christine Poerschke (BLOOMBERG/ LONDON)" <cpoersc...@bloomberg.net> wrote: Hi Krishan, Could you share what version of Solr you are using? And I wonder if the observed behaviour could be reproduced e.g. with the techproducts example, changes not applying after reload [1] sounds like a bug if so. Hope that helps. Regards, Christine [1] https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flucene.apache.org%2Fsolr%2Fguide%2F8_6%2Flearning-to-rank.html%23applying-changes&data=01%7C01%7CMonica.Skidmore%40careerbuilder.com%7C65581e5e79414c90832508d82fc8ce21%7C7cc1677566a34e8b80fd5b1f1db15061%7C0&sdata=mMqgPhnkjb8h7ETQNaySOBJQ8x%2FP2dtzM%2FgSE1K1FZg%3D&reserved=0 From: solr-user@lucene.apache.org At: 07/22/20 14:00:59To: solr-user@lucene.apache.org Subject: Re: Replication of Solr Model and feature store Adding more details here I need some help on how to enable the solr LTR model and features on all nodes of a solr cluster. I am unable to replicate the model and the feature store though from any master to its slaves with the replication API ? And unable to find any documentation for the same. Is replication possible? Without replication, would I have to individually update all nodes of a cluster ? Or can the feature and model files be read as a resource (like config or schema) so that I can replicate the file or add the file to my deployments. On Wed, Jul 22, 2020 at 5:53 PM krishan goyal <krishan1...@gmail.com> wrote: > Bump. Any one has an idea how to proceed here ? > > On Wed, Jul 8, 2020 at 5:41 PM krishan goyal <krishan1...@gmail.com> > wrote: > >> Hi, >> >> How do I enable replication of the model and feature store ? >> >> Thanks >> Krishan >> >
