[lucy-issues] [jira] [Resolved] (LUCY-254) Creation of Charmonizer temp files sometimes fails on Windows

["Marvin Humphrey (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCY-254?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marvin Humphrey resolved LUCY-254.
----------------------------------

       Resolution: Fixed
    Fix Version/s: 0.4.0
         Assignee: Marvin Humphrey

> Creation of Charmonizer temp files sometimes fails on Windows
> -------------------------------------------------------------
>
>                 Key: LUCY-254
>                 URL: https://issues.apache.org/jira/browse/LUCY-254
>             Project: Lucy
>          Issue Type: Bug
>          Components: Charmonizer
>            Reporter: Nick Wellnhofer
>            Assignee: Marvin Humphrey
>             Fix For: 0.4.0
>
>
> On Windows, a file won't be deleted until every open handle on it is closed. So if a file is deleted and immediately recreated with the same filename, the creation fails if another process (typically a virus scanner) still has an open handle on it. The solution is to create temporary files with unique names. I propose to add the following function to {{OperatingSystem.c}} and use it for every temp file:
> {noformat}
> char*
> chaz_OS_temp_filename(const char *prefix, const char *ext);
> {noformat}
> It should simply add a number to the filename which is incremented on every call to that function.
> (Currently, the effect is that Charmonizer occasionally fails in {{chaz_Util_remove_and_verify}}. This kind of verification isn't reliable on Windows.)



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