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Posted to dev@lucene.apache.org by "Munendra S N (JIRA)" <ji...@apache.org> on 2019/07/05 14:11:00 UTC
[jira] [Resolved] (SOLR-13196) NullPointerException in
o.a.solr.search.facet.FacetFieldProcessor.findTopSlots()
[ https://issues.apache.org/jira/browse/SOLR-13196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Munendra S N resolved SOLR-13196.
---------------------------------
Resolution: Duplicate
> NullPointerException in o.a.solr.search.facet.FacetFieldProcessor.findTopSlots()
> -----------------------------------------------------------------------------------
>
> Key: SOLR-13196
> URL: https://issues.apache.org/jira/browse/SOLR-13196
> 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
> 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]. The attached file ({{home.zip}}) gives the contents of folder {{/tmp/home}} that you will obtain by following the steps below:
> {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
> {noformat}
> Reporter: Cesar Rodriguez
> Priority: Minor
> Labels: diffblue, newdev
> Attachments: home.zip
>
>
> Requesting the following URL causes Solr to return an HTTP 500 error response:
> {noformat}
> http://localhost:8983/solr/films/select?facet.sort=asc&facet=on&bf=2&q=x&facet.version=2&facet.field=genre
> {noformat}
> The error response seems to be caused by the following uncaught exception:
> {noformat}
> java.lang.NullPointerException
> at org.apache.solr.search.facet.FacetFieldProcessor.lambda$findTopSlots$1(FacetFieldProcessor.java:325)
> at org.apache.solr.search.facet.FacetFieldProcessor$1.lessThan(FacetFieldProcessor.java:331)
> at org.apache.solr.search.facet.FacetFieldProcessor$1.lessThan(FacetFieldProcessor.java:329)
> at org.apache.lucene.util.PriorityQueue.upHeap(PriorityQueue.java:254)
> at org.apache.lucene.util.PriorityQueue.add(PriorityQueue.java:131)
> at org.apache.solr.search.facet.FacetFieldProcessor.findTopSlots(FacetFieldProcessor.java:363)
> at org.apache.solr.search.facet.FacetFieldProcessorByArray.calcFacets(FacetFieldProcessorByArray.java:114)
> at org.apache.solr.search.facet.FacetFieldProcessorByArray.process(FacetFieldProcessorByArray.java:62)
> at org.apache.solr.search.facet.FacetRequest.process(FacetRequest.java:401)
> at org.apache.solr.search.facet.FacetProcessor.processSubs(FacetProcessor.java:472)
> at org.apache.solr.search.facet.FacetProcessor.fillBucket(FacetProcessor.java:429)
> at org.apache.solr.search.facet.FacetQueryProcessor.process(FacetQuery.java:64)
> at org.apache.solr.search.facet.FacetRequest.process(FacetRequest.java:401)
> at org.apache.solr.search.facet.FacetModule.process(FacetModule.java:139)
> at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:298)
> [...]
> {noformat}
> Removing any parameter in the URL makes the NPE disappear, so all URL parameters seem to be involved.
> Method {{org.apache.solr.search.facet.FacetFieldProcessor.findTopSlots()}}, at line 316 retrieves the field {{sortAcc}}, which is null. This null pointer is subsequently used in a lambda expression, line 325 (and 320!). I guess the problem is that some input validation is missing?
> We found this bug 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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