[jira] [Updated] (SOLR-13183) NullPointerException at o.a.solr.servlet.SolrDispatchFilter.doFilter

["Jan Høydahl (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-13183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Høydahl updated SOLR-13183:
-------------------------------
    Environment:     (was: 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}
)

> NullPointerException at o.a.solr.servlet.SolrDispatchFilter.doFilter
> --------------------------------------------------------------------
>
>                 Key: SOLR-13183
>                 URL: https://issues.apache.org/jira/browse/SOLR-13183
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: master (9.0)
>            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/schema/%25
> {noformat}
> The error response seems to be caused by the following uncaught exception:
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:403)
> 	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:340)
> 	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
> 	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
> 	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
> 	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
> [...]
> {noformat}
> Function SolrDisplatchFilter.doFilter(), line 403 calls methods forward() on a null pointer. The problem happens because ServletRequestWrapper.getRequestDispatcher(), line 338 returns null. And that happens because org.eclipse.jetty.server.handler.ContextHandler.Context.getRequestDispatcher() returns a null pointer. This happens because org.eclipse.jetty.http.HttpURI.getDecodedPath() tries to decode the string {{/solr/films/schema/%}}, which is an invalid encoding.
> I don’t fully follow the logic of the code but it seems that the percent-encoding of the URL has first been decoded and then it’s being decoded again?
> 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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