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https://issues.apache.org/jira/browse/SOLR-13204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Munendra S N resolved SOLR-13204.
---------------------------------
Resolution: Fixed
Assignee: Munendra S N
Fix Version/s: 8.2
> ArrayIndexOutOfBoundsException in
> org/apache/solr/search/grouping/endresulttransformer/MainEndResultTransformer.java[36]
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-13204
> URL: https://issues.apache.org/jira/browse/SOLR-13204
> Project: Solr
> Issue Type: Bug
> Affects Versions: master (9.0)
> Environment: h1. Steps to reproduce
> * Use a Linux machine.
> * Build commit {{ea2c8ba}} of Solr as described in the section below.
> * Build the films collection as described below.
> * Start the server using the command {{./bin/solr start -f -p 8983 -s
> /tmp/home}}
> * Request the URL given in the bug description.
> h1. Compiling the server
> {noformat}
> git clone https://github.com/apache/lucene-solr
> cd lucene-solr
> git checkout ea2c8ba
> ant compile
> cd solr
> ant server
> {noformat}
> h1. Building the collection and reproducing the bug
> We followed [Exercise
> 2|http://lucene.apache.org/solr/guide/7_5/solr-tutorial.html#exercise-2] from
> the [Solr
> Tutorial|http://lucene.apache.org/solr/guide/7_5/solr-tutorial.html].
> {noformat}
> mkdir -p /tmp/home
> echo '<?xml version="1.0" encoding="UTF-8" ?><solr></solr>' >
> /tmp/home/solr.xml
> {noformat}
> In one terminal start a Solr instance in foreground:
> {noformat}
> ./bin/solr start -f -p 8983 -s /tmp/home
> {noformat}
> In another terminal, create a collection of movies, with no shards and no
> replication, and initialize it:
> {noformat}
> bin/solr create -c films
> curl -X POST -H 'Content-type:application/json' --data-binary '{"add-field":
> {"name":"name", "type":"text_general", "multiValued":false, "stored":true}}'
> http://localhost:8983/solr/films/schema
> curl -X POST -H 'Content-type:application/json' --data-binary
> '{"add-copy-field" : {"source":"*","dest":"_text_"}}'
> http://localhost:8983/solr/films/schema
> ./bin/post -c films example/films/films.json
> curl -v "URL_BUG"
> {noformat}
> Please check the issue description below to find the "URL_BUG" that will
> allow you to reproduce the issue reported.
> Reporter: Marek
> Assignee: Munendra S N
> Priority: Minor
> Labels: diffblue, newdev
> Fix For: 8.2
>
>
> Requesting the following URL causes Solr to return an HTTP 500 error response:
> {noformat}
> solr/films/select?group=true&distrib=true&group.main=true
> {noformat}
> The error response seems to be caused by the following uncaught exception:
> {noformat}
> ERROR (qtp689401025-18) [ x:films] o.a.s.s.HttpSolrCall
> null:java.lang.ArrayIndexOutOfBoundsException: 0
> at
> org.apache.solr.search.grouping.endresulttransformer.MainEndResultTransformer.transform(MainEndResultTransformer.java:36)
> at
> org.apache.solr.handler.component.QueryComponent.groupedFinishStage(QueryComponent.java:638)
> at
> org.apache.solr.handler.component.QueryComponent.finishStage(QueryComponent.java:601)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:432)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2559)
> at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
> at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:516)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:394)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:340)
> [...]
> {noformat}
> There is accessed the first element of an empty array of strings, stored in
> the member 'org.apache.solr.search.grouping.GroupingSpecification.fields'.
> There is an attept to put some strings to the array at
> org/apache/solr/handler/component/QueryComponent.java[283]; however, the
> string "group.field" is not present in params of the processed
> org.apache.solr.request.SolrQueryRequest instance.
> Look into section 'Environment' above to see installation step of Solr and
> films collection.
> We found this issue and ~70 more like this using [Diffblue Microservices
> Testing|https://www.diffblue.com/labs/?utm_source=solr-br]. Find more
> information on this [fuzz testing
> campaign|https://www.diffblue.com/blog/2018/12/19/diffblue-microservice-testing-a-sneak-peek-at-our-early-product-and-results?utm_source=solr-br].
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