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https://issues.apache.org/jira/browse/LUCENE-1472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-1472:
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Attachment: LUCENE-1472.patch
Better patch with also the stupid enum declared as enum. Now the constant
lookup should even faster (in table-switch statement).
Will commit soon.
> DateTools.stringToDate() can cause lock contention under load
> -------------------------------------------------------------
>
> Key: LUCENE-1472
> URL: https://issues.apache.org/jira/browse/LUCENE-1472
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 2.3.2
> Reporter: Mark Lassau
> Assignee: Uwe Schindler
> Priority: Minor
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-1472.patch, LUCENE-1472.patch
>
>
> Load testing our application (the JIRA Issue Tracker) has shown that threads
> spend a lot of time blocked in DateTools.stringToDate().
> The stringToDate() method uses a singleton SimpleDateFormat object to parse
> the dates.
> Each call to SimpleDateFormat.parse() is *synchronized* because
> SimpleDateFormat is not thread safe.
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