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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5830) Make DoubleProperties.propertyNames() thread-safe
Date Mon, 25 Jun 2012 13:37:43 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400472#comment-13400472
] 

Dag H. Wanvik commented on DERBY-5830:
--------------------------------------

Looks like a good improvement in its own right. +1

                
> Make DoubleProperties.propertyNames() thread-safe
> -------------------------------------------------
>
>                 Key: DERBY-5830
>                 URL: https://issues.apache.org/jira/browse/DERBY-5830
>             Project: Derby
>          Issue Type: Bug
>          Components: Services
>    Affects Versions: 10.9.1.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>         Attachments: keys-only-v2.diff
>
>
> As discussed in DERBY-4269, DoubleProperties.propertyNames() may throw a NullPointerException
if properties are removed by another thread while the method is executing. Since DoubleProperties
is a sub-class of, and used as a drop-in replacement for, java.util.Properties, it should
be thread-safe just like the propertyNames() method in the parent class.

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