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From "Marek (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-13206) ArrayIndexOutOfBoundsException in org/apache/solr/request/SimpleFacets.java[705]
Date Thu, 31 Jan 2019 14:00:00 GMT
Marek created SOLR-13206:
----------------------------

             Summary: ArrayIndexOutOfBoundsException in org/apache/solr/request/SimpleFacets.java[705]
                 Key: SOLR-13206
                 URL: https://issues.apache.org/jira/browse/SOLR-13206
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    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


Requesting the following URL causes Solr to return an HTTP 500 error response:

{noformat}
http://localhost:8983/solr/films/select?group=true&group.func=genre&group.facet=true&facet.pivot=_version_&on&facet=true
{noformat}

The error response seems to be caused by the following uncaught exception:

{noformat}
ERROR (qtp689401025-21) [   x:films] o.a.s.h.RequestHandlerBase java.lang.ArrayIndexOutOfBoundsException:
0
	at org.apache.solr.request.SimpleFacets.getGroupedCounts(SimpleFacets.java:705)
	at org.apache.solr.request.SimpleFacets.getTermCounts(SimpleFacets.java:495)
	at org.apache.solr.request.SimpleFacets.getTermCountsForPivots(SimpleFacets.java:414)
	at org.apache.solr.handler.component.PivotFacetProcessor.processSingle(PivotFacetProcessor.java:221)
	at org.apache.solr.handler.component.PivotFacetProcessor.process(PivotFacetProcessor.java:169)
	at org.apache.solr.handler.component.FacetComponent.process(FacetComponent.java:279)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:298)
	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)
394)
	[...]
{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.

The cause of the issue seems to be similar to one reported in SOLR-13204.

To set up an environment to reproduce this bug, follow the description in the 'Environment'
field.

We automatically 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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