[logback-dev] [JIRA] Commented: (LBCLASSIC-36) Synchronization of SimpleDateFormat object in DateConverter

[Joern Huxhorn (JIRA)]

    [ http://jira.qos.ch/browse/LBCLASSIC-36?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11196#action_11196 ] 

Joern Huxhorn commented on LBCLASSIC-36:
----------------------------------------

This was just a side-effect of trying to get logback to compile using "mvn clean install". I'll take another look at DateFormatPerftest.

My suggestion above is still standing (I know, we just had a comment race-condition ;)): how about the interface?

> Synchronization of SimpleDateFormat object in DateConverter
> -----------------------------------------------------------
>
>                 Key: LBCLASSIC-36
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-36
>             Project: logback-classic
>          Issue Type: Bug
>          Components: Other
>    Affects Versions: unspecified
>         Environment: Operating System: All
> Platform: All
>            Reporter: Anders Hammar
>            Assignee: Ceki Gulcu
>         Attachments: DateConverter_patch.java, DateFormatPerfTest.java, dateformattest.zip
>
>
> According to the API documentation of SimpleDateFormat, date formats are not synchronized and it is recommended to create separate format instances for each thread.
> However, a possibly simpler (mer efficient) solution would be to synchronize on the SimpleDateFormat object in the convert() method to prevent two threads to access it concurrently.

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