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From "Cesar Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-13187) NullPointerException at o.a.solr.search.QParser.getParser
Date Tue, 29 Jan 2019 17:48:00 GMT
Cesar Rodriguez created SOLR-13187:
--------------------------------------

             Summary: NullPointerException at o.a.solr.search.QParser.getParser
                 Key: SOLR-13187
                 URL: https://issues.apache.org/jira/browse/SOLR-13187
             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

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
         Attachments: home.zip

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

{noformat}
http://localhost:8983/solr/films/select?fq={!a}
{noformat}

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

{noformat}
java.lang.NullPointerException
	at org.apache.solr.search.QParser.getParser(QParser.java:367)
	at org.apache.solr.search.QParser.getParser(QParser.java:319)
	at org.apache.solr.search.QParser.getParser(QParser.java:309)
	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:203)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:272)
	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)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
[...]
{noformat}

The call to {{getQueryPlugin}} from {{org.apache.solr.search.QParser.getParser()}}, at line
366, can return a null pointer, as witnessed by the URL above. Method {{getParser}} should
probably check for this.


We found this bug using [Diffblue Microservices Testing|https://www.diffblue.com/labs/]. 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].




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