You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2010/08/24 18:45:16 UTC
[jira] Assigned: (LUCENE-2620) Queries with too many asterisks
causing 100% CPU usage
[ https://issues.apache.org/jira/browse/LUCENE-2620?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Muir reassigned LUCENE-2620:
-----------------------------------
Assignee: Robert Muir
> Queries with too many asterisks causing 100% CPU usage
> ------------------------------------------------------
>
> Key: LUCENE-2620
> URL: https://issues.apache.org/jira/browse/LUCENE-2620
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 3.0.1
> Environment: Debian Lenny with Tomcat 5.5 and Mac OS X 10.6 with Tomcat 6, probably others
> Reporter: Nick Barkas
> Assignee: Robert Muir
> Attachments: lucene-asterisks.diff
>
>
> If a search query has many adjacent asterisks (e.g. fo**************obar), I can get my webapp caught in a loop that does not seem to end in a reasonable amount of time and may in fact be infinite. For just a few asterisks the query eventually does return some results, but as I add more it takes a longer and longer amount of time. After about six or seven asterisks the query never seems to finish. Even if I abort the search, the thread handling the troublesome query continues running in the background and pinning a CPU.
> I found the problem in src/java/org/apache/lucene/search/WildcardTermEnum.java on Lucene 3.0.1 and it looks like 3.0.2 ought to be affected as well. I'm not sure about trunk, though. I have a patch that fixes the problem for me in 3.0.1.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org