Solr LTR query giving model not found error even though model exsists

[Yatin Grover <ya...@publicissapient.com>]

Hi,

I have configured LTR in my solr collection and I am able to see my feature and model file. To test things out I have kept only two features and a very basic model file. I have attached both the files.
I am able to retrieve the features using the following query : localhost:8983/solr/waterstest/query?q=*:*&fl=title,id,description,score,[features store=myWatersFeatureStore efi.boostedTitle=columns efi.boostedDescription=Heater]<http://localhost:8983/solr/waterstest/query?q=*:*&fl=title,id,description,score,%5bfeatures%20store=myWatersFeatureStore%20efi.boostedTitle=columns%20efi.boostedDescription=Heater%5d>
The above works fine. I am able to retrieve the feature and the score with the data

The problem comes when I try to rerank the results with the uploaded model. Here are the queries I have tried to rerank the results
localhost:8983/solr/waterstest/query?q=title:columns&rq={!ltr model=myWatersModel reRankDocs=100 efi.boostedTitle=columns efi.boostedDescription=Heater}&fl=id,score<http://localhost:8983/solr/waterstest/query?q=title:columns&rq=%7b!ltr%20model=myWatersModel%20reRankDocs=100%20efi.boostedTitle=columns%20efi.boostedDescription=Heater%7d&fl=id,score>

Response

{
  "responseHeader":{
    "zkConnected":true,
    "status":400,
    "QTime":28,
    "params":{
      "q":"title:columns",
      "fl":"id,score",
      "rq":"{!ltr model=myWatersModel reRankDocs=100 efi.boostedTitle=columns efi.boostedDescription=Heater}"}},
  "error":{
    "metadata":[
      "error-class","org.apache.solr.common.SolrException",
      "root-error-class","org.apache.solr.common.SolrException",
      "error-class","org.apache.solr.client.solrj.impl.BaseHttpSolrClient$RemoteSolrException",
      "root-error-class","org.apache.solr.client.solrj.impl.BaseHttpSolrClient$RemoteSolrException"],
    "msg":"Error from server at null: cannot find model myWatersModel",
    "code":400}}


There is nothing in logs just the same error there

org.apache.solr.client.solrj.impl.BaseHttpSolrClient$RemoteSolrException: Error from server at null: cannot find model myWatersModel

        at org.apache.solr.client.solrj.impl.Http2SolrClient.processErrorsAndResponse(Http2SolrClient.java:742)

        at org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:412)

        at org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:761)

        at org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1290)

        at org.apache.solr.handler.component.HttpShardHandler.request(HttpShardHandler.java:78)

        at org.apache.solr.handler.component.ShardRequestor.call(ShardRequestor.java:130)

        at org.apache.solr.handler.component.ShardRequestor.call(ShardRequestor.java:41)

        at java.util.concurrent.FutureTask.run(Unknown Source)

        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)

        at java.util.concurrent.FutureTask.run(Unknown Source)

        at com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:180)

        at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:212)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

        at java.lang.Thread.run(Unknown Source)


I am able to retrieve the model store also : localhost:8983/solr/waterstest/schema/model-store<http://localhost:8983/solr/waterstest/schema/model-store>


{

  "responseHeader":{

    "status":0,

    "QTime":1},

  "models":[{

      "name":"myWatersModel",

      "class":"org.apache.solr.ltr.model.LinearModel",

      "store":"myWatersFeatureStore",

      "features":[{

          "name":"isboostedTitle",

          "norm":{"class":"org.apache.solr.ltr.norm.IdentityNormalizer"}},

        {

          "name":"isboostedDescription",

          "norm":{"class":"org.apache.solr.ltr.norm.IdentityNormalizer"}}],

      "params":{"weights":{

          "isboostedTitle":0.4,

          "isboostedDescription":0.2}}}]}


If the feature query works and I am able to retrieve the model as well then why am I getting the model null error. I know the error handling part is not apt here so can someone help me to point out what all could have gone wrong here?

Thanks and Regards
Yatin Grover




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