[jira] Updated: (FELIX-1251) Looping NullPointerException if the polled directory is removed after File Install registration

["Guido Spadotto (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FELIX-1251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guido Spadotto updated FELIX-1251:
----------------------------------

    Environment: Windows Vista

> Looping NullPointerException if the polled directory is removed after File Install registration
> -----------------------------------------------------------------------------------------------
>
>                 Key: FELIX-1251
>                 URL: https://issues.apache.org/jira/browse/FELIX-1251
>             Project: Felix
>          Issue Type: Bug
>          Components: File Install
>    Affects Versions:  fileinstall-1.0.0
>         Environment: Windows Vista
>            Reporter: Guido Spadotto
>            Priority: Minor
>
> If the directory being polled by File Install is removed while File Install is running, 
> the method DirectoryWatcher.traverse will raise a NullPointerException
> when evaluating the condition for its "for" loop (the "list" variable  will be null).
> This is a possible workaround:
> void traverse(Map/* <String, Jar> */ jars, Set configs, File jardir)
>     {
>         String list[] = jardir.list();
>         if (list==null){
>             ConcurrentModificationException cme = new ConcurrentModificationException("Unable to list "
>                     +this.watchedDirectory+ " contents. Has it been removed after " +
>                     "File Install started?");
>             throw cme;
>         }
>         for (int i = 0; (list!=null) && i < list.length; i++)
>         {
>         ...
> This will not stop the outer loop from logging the Exception though, 
> which might not be convenient for the end user.

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