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From "Aaron McCurry (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (BLUR-142) Create IndexReader that can be exited at any time via AtomicBoolean
Date Wed, 19 Jun 2013 01:20:20 GMT

     [ https://issues.apache.org/jira/browse/BLUR-142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron McCurry closed BLUR-142.
------------------------------

    Resolution: Fixed

https://git-wip-us.apache.org/repos/asf?p=incubator-blur.git;a=commit;h=c921b55f6d3e5ffd44338f77e9822be054ce76a2
                
> Create IndexReader that can be exited at any time via AtomicBoolean
> -------------------------------------------------------------------
>
>                 Key: BLUR-142
>                 URL: https://issues.apache.org/jira/browse/BLUR-142
>             Project: Apache Blur
>          Issue Type: Bug
>          Components: Blur
>    Affects Versions: 0.2.0
>            Reporter: Aaron McCurry
>             Fix For: 0.2.0
>
>
> This has to do with query cancelation and I thought that the way Lucene 4 implemented
query rewrites this would not be needed anymore.  However I was wrong.  During leading wildcard
queries the all the terms of a field have to be traversed and if the field is very large this
can cause a lot of processing to occur.  During this term iteration if the query is canceled
or it timeouts the thread has no way of exiting the iteration loop.
> The ExitableReader provides a lightweight wrapper around a standard DirectoryReader and
will throw an exception once the internal AtomicBoolean is set to false.

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