Marek created SOLR-13182: ---------------------------- Summary: NullPointerException due to an invariant violation in org/apache/lucene/search/BooleanClause.java[60] Key: SOLR-13182 URL: https://issues.apache.org/jira/browse/SOLR-13182 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: Marek Attachments: home.zip Requesting the following URL causes Solr to return an HTTP 500 error response: {noformat} http://localhost:8983/solr/films/select?q={!child%20q={} {noformat} The error response seems to be caused by the following uncaught exception: {noformat} ERROR (qtp689401025-14) [ x:films] o.a.s.h.RequestHandlerBase java.lang.NullPointerException: Query must not be null at java.util.Objects.requireNonNull(Objects.java:228) at org.apache.lucene.search.BooleanClause.<init>(BooleanClause.java:60) at org.apache.lucene.search.BooleanQuery$Builder.add(BooleanQuery.java:127) at org.apache.solr.search.join.BlockJoinChildQParser.noClausesQuery(BlockJoinChildQParser.java:50) at org.apache.solr.search.join.FiltersQParser.parse(FiltersQParser.java:60) at org.apache.solr.search.QParser.getQuery(QParser.java:173) at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:158) 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) [...] {noformat} In org/apache/solr/search/join/BlockJoinChildQParser.java[47] there is computed query variable 'parents', which receives value null from call to 'parseParentFilter()'. The null value is then passed to 'org.apache.lucene.search.BooleanQuery.Builder.add' method at line 50. That method calls the constructor where 'Objects.requireNonNull' failes (the exception is thrown). The call to 'parseParentFilter()' evaluates to null, because: # In org/apache/solr/search/join/BlockJoinParentQParser.java[59] null is set to string 'filter' (becase "which" is not in 'localParams' map). # The parser 'parentParser' obtained in the next line has member 'qstr' set to null, because the 'filter' passed to 'subQuery' is passed as the first argument to 'org.apache.solr.search.QParserPlugin.createParser'. # Subsequnt call to 'org.apache.solr.search.QParser.getQuery' on the 'parentParser' at org/apache/solr/search/join/BlockJoinParentQParser.java[61] leads to retuning null in 'org.apache.solr.search.LuceneQParser.parse', because the queried string 'qstr' is the empty string. -------------------------------------- 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]. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org