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From "Myrna van Lunteren (JIRA)" <j...@apache.org>
Subject [jira] Closed: (DERBY-1783) Logical error in code for determining mode for opening of log files
Date Wed, 23 May 2007 01:13:16 GMT

     [ https://issues.apache.org/jira/browse/DERBY-1783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Myrna van Lunteren closed DERBY-1783.

       Resolution: Fixed
    Fix Version/s:

> Logical error in code for determining mode for opening of log files
> -------------------------------------------------------------------
>                 Key: DERBY-1783
>                 URL: https://issues.apache.org/jira/browse/DERBY-1783
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions:
>         Environment: JVM 1.4.2 and later
>            Reporter: Olav Sandstaa
>         Assigned To: Olav Sandstaa
>            Priority: Trivial
>             Fix For:,,
>         Attachments: rwsync.diff
> There is a logical error in the following function in DirFile4.java
> for determining which mode to use when opening a new log file:
>     public StorageRandomAccessFile getRandomAccessFile( String mode) throws FileNotFoundException
>     {
>         // Assume that modes "rws" and "rwd" are not supported.
>         if(!rwsOK && "rws".equals( mode) || "rwd".equals( mode))
>             mode = "rw";
>         return new DirRandomAccessFile4( (File) this, mode);
>     } // end of getRandomAccessFile
> The expression in the if test is missing parentheses around the OR
> expression making it return the wrong value for one case. If "rwd"
> mode is requested for the file (and this is supported by the JVM), the
> file is opened with "rw" instead of "rwd".
> NOTE: this bug does not effect any current Derby versions since as far
> as I know "rwd" is never used for log files. I came across it when
> experimenting with using "rwd" for the log.

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