Cord19 solr blacklight replication doc

[shaneding]

An extension of experiments-cord19.md.

I encountered this error during indexing through solr, but I think this is a result of the format of data rather than the code:
Request to collection [cord19] failed due to (400) org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://192.168.1.20:8983/solr/cord19_shard1_replica_n1: ERROR: [doc=y6o5e2k5] multiple values encountered for non multiValued field source_x: [Elsevier, Medline, PMC], retry=0 commError=false errorCode=400

[codecov]

Codecov Report

Merging #1233 into master will increase coverage by 0.22%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1233      +/-   ##
============================================
+ Coverage     48.11%   48.33%   +0.22%     
- Complexity      729      739      +10     
============================================
  Files           147      147              
  Lines          8559     8559              
  Branches       1217     1217              
============================================
+ Hits           4118     4137      +19     
+ Misses         4101     4082      -19     
  Partials        340      340              

Impacted Files	Coverage Δ	Complexity Δ
...java/io/anserini/ltr/feature/CountBigramPairs.java	89.61% <0.00%> (+24.67%)	33.00% <0.00%> (+10.00%)

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[lintool]

@edwinzhng can you take a look? that multi-value issue sounds familiar.

@shaneding we can remove the Solr section from experiments-cord19.md, right?

[lintool]

Remove "Title: "

[shaneding]

Yes, the solr section in experiments-cord19-extra.md is basically a copy and paste from experiments-cord19.md, also just a note the error didn't actually stop the indexing, indexing just continued past it.

[edwinzhng]

Issue is because of #1231 yesterday. I forgot to update the Solr config. To fix it, can you change src/main/resources/solr/schemas/covid.json so that the field with source_x becomes:

  "add-field": {
    "name":"source_x",
    "type":"string",
    "stored":true,
    "multiValued": true
  },

Once this is done, you can verify that it works by recreating the collection with the new schema as per the README and then index after.

solrini/bin/solr delete -c cord19
pushd src/main/resources/solr && ./solr.sh ../../../../solrini localhost:9983 && popd
solrini/bin/solr create -n anserini -c cord19
curl -X POST -H 'Content-type:application/json' --data-binary @src/main/resources/solr/schemas/covid.json http://localhost:8983/solr/cord19/schema

[edwinzhng]

Also, would you be able to rename covid.json to cord19.json for consistency (and update the docs as well)? 😄

[shaneding]

The error was resolved after updating the json file 👍