Cesar Rodriguez created SOLR-13209:
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Summary: NullPointerException from call in
org.apache.solr.search.SolrIndexSearcher.getDocSet
Key: SOLR-13209
URL: https://issues.apache.org/jira/browse/SOLR-13209
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: Cesar Rodriguez
Requesting the following URL causes Solr to return an HTTP 500 error response:
{noformat}
http://localhost:8983/solr/films/select?group=true&group.query
{noformat}
The error response seems to be caused by the following uncaught exception:
{noformat}
java.lang.NullPointerException
at
java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
at
org.apache.solr.util.ConcurrentLRUCache.get(ConcurrentLRUCache.java:124)
at org.apache.solr.search.FastLRUCache.get(FastLRUCache.java:163)
at
org.apache.solr.search.SolrIndexSearcher.getDocSet(SolrIndexSearcher.java:792)
at
org.apache.solr.search.Grouping$CommandQuery.createFirstPassCollector(Grouping.java:860)
at org.apache.solr.search.Grouping.execute(Grouping.java:327)
at
org.apache.solr.handler.component.QueryComponent.doProcessGroupedSearch(QueryComponent.java:1408)
at
org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:365)
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)
[...]
{noformat}
Method {{org.apache.solr.search.SolrIndexSearcher.getDocSet()}}, at line 792
calls {{filterCache.get(absQ)}} where {{absQ}} is a null pointer. I think this
null pointer comes in fact from the caller, but I don't fully follow the logic
of the code.
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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