lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11512) Query parsing should not loop forever with 100% cpu
Date Thu, 19 Oct 2017 01:39:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16210438#comment-16210438
] 

Yonik Seeley commented on SOLR-11512:
-------------------------------------

Interesting... this is probably due to edismax trying to parse as-is, catching any exceptions,
and then trying more aggressive escaping to try and prevent the parse exception.
Definitely specific to edismax, but I wouldn't have thought it would somehow bypass the infinite
recursion checker.

> Query parsing should not loop forever with 100% cpu
> ---------------------------------------------------
>
>                 Key: SOLR-11512
>                 URL: https://issues.apache.org/jira/browse/SOLR-11512
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 7.1
>            Reporter: Will Currie
>            Priority: Minor
>
> The following query against the techproducts example puts solr into an infinite loop:
> {noformat}
> curl -g -v 'http://localhost:8983/solr/techproducts/select?q=*&defType=edismax&qq={!edismax+v=something}&bq={!edismax+v=$qq}
> {noformat}
> Problem doesn't depend on the collection, just an easy example. I guess I'd expect a
failure with "Infinite Recursion detected parsing query ..." instead. So depending on the
query config a user typing {!edismax v=whatever} into a search box can send a solr instance
to 100% cpu.
> I can reproduce using TestExtendedDismaxParser by adding:
> {code}
>   @Test
>   public void loopsForever() throws Exception {
>     assertJQ(req("defType", "edismax", "q", "*", "qq", "{!edismax v=something}", "bq",
"{!edismax v=$qq}"));
>   }
> {code}
> The code seems to hit QParser.checkRecurse() and try to fail but something sends it around
for another try. Repeat.
> Given the complexity of the parsing code there may well be other examples. There's no
way to disable the local params syntax is there? Question was asked in SOLR-4197.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message