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From "Mark Harwood (JIRA)" <>
Subject [jira] Commented: (LUCENE-1720) TimeLimitedIndexReader and associated utility class
Date Wed, 01 Jul 2009 13:51:47 GMT


Mark Harwood commented on LUCENE-1720:

re points 1,2,3  - yep, will change.

re the question  - yes, TimeoutThread should call the existing "resetFirstAnticipatedFailure()"
method to advance timeout monitoring immediately to the next candidate - it currently requires
the first bad Thread to call stop() before monitoring is advanced to spot the next bad thread.

I think a useful safety measure is to manage clients that don't call stop() (e.g. forgetting
to code a "finally...stop") but this is likely to add complexity to ActivityTimeMonitor so
I want to get a basic version solid first before thinking too much about this.

> TimeLimitedIndexReader and associated utility class
> ---------------------------------------------------
>                 Key: LUCENE-1720
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>            Reporter: Mark Harwood
>            Assignee: Mark Harwood
>            Priority: Minor
>         Attachments:,,,
> An alternative to TimeLimitedCollector that has the following advantages:
> 1) Any reader activity can be time-limited rather than just single searches e.g. the
document retrieve phase.
> 2) Times out faster (i.e. runaway queries such as fuzzies detected quickly before last
"collect" stage of query processing)
> Uses new utility timeout class that is independent of IndexReader.
> Initial contribution includes a performance test class but not had time as yet to work
up a formal Junit test.
> TimeLimitedIndexReader is coded as JDK1.5 but can easily be undone.

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