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From David Van Couvering <da...@vancouvering.com>
Subject Re: "Can't find database"
Date Thu, 12 Aug 2010 16:41:53 GMT
Yes, there is definitely the possibility of multiple threads trying to boot
the database.  I'll look into that.

This appears to be happening on 64-bit Windows machines only, but that could
be a machine-related timing, or it could be the 64-bit VM.

On Wed, Aug 11, 2010 at 10:58 PM, Kristian Waagan <
kristian.waagan@oracle.com> wrote:

>  On 12.08.10 01:07, David Van Couvering wrote:
>
> Looks like it was a slash/forward-slash issue.  I changed my code to use
> File.separator and this very strange bug (it would only happen sometimes,
> and only on some machines) looks like it has gone away.
>
>
> Since the problem is intermittent, could it be caused by multiple threads
> trying to boot the database?
> And in case somebody wants to pursue this issue later, do you know if it
> happened across a range of different JVMs?
>
>
> Thanks,
> --
> Kristian
>
>
>
> Thanks,
>
> David
>
> On Tue, Aug 10, 2010 at 1:48 AM, Kristian Waagan <
> kristian.waagan@oracle.com> wrote:
>
>>  On 09.08.10 23:55, David Van Couvering wrote:
>>
>> I am getting these intermittent errors that I can't reproduce on my
>> machine:
>>
>>  Database 'C:\VontuDev\main\dist\scan\incremental_index/MONITOR/INCREMENTAL_INFO'
not found
>>
>>
>> I read the docs, and there is no discussion about whether a mixed "\" "/"
>> path is a problem on some systems.  Could it be?  Do I need to normalize the
>> path to all forward slashes?
>>
>>
>>  Hi David,
>>
>> I guess there can be problems related to mixing different path separators,
>> but testing on OpenSolaris does suggest that the monitor and the in-memory
>> back end are capable of handling it:
>>
>> java -Dderby.system.home="C:\VontuDev\main\dist\scan\incremental_index"
>> -cp classes org.apache.derby.tools.ij
>> ij version 10.7
>> ij> connect 'jdbc:derby:memory:MONITOR/INCREMENTAL_INFO;create=true';
>> ij>
>>
>> Then, from derby.log:
>>
>> memory:/home/user/derby/wdir/trunk-netbeans/C:\VontuDev\main\dist\scan\incremental_index/MONITOR/INCREMENTAL_INFO
>>
>> However, trying this with an on-disk database fails. My guess is because
>> I'm on UNIX, and then the colon from c:\ shows up in a place it's not
>> supposed to be.
>> In general, I think your mileage depends on what java.io.File is capable
>> of, but there might be problems in the explicit path handling within Derby.
>>
>> Do you get an assert failure if you run with a sane build when you try to
>> boot the database?
>>
>>
>> Regards,
>> --
>> Kristian
>>
>>
>>
>>
>> What can cause this error to happen?  I checked, and the directory is
>> there on the system.
>>
>> Thanks,
>>
>> David
>>
>> --
>> David W. Van Couvering
>>
>> http://www.linkedin.com/in/davidvc
>> http://davidvancouvering.blogspot.com
>> http://twitter.com/dcouvering
>>
>>
>>
>
>
> --
> David W. Van Couvering
>
> http://www.linkedin.com/in/davidvc
> http://davidvancouvering.blogspot.com
> http://twitter.com/dcouvering
>
>
>


-- 
David W. Van Couvering

http://www.linkedin.com/in/davidvc
http://davidvancouvering.blogspot.com
http://twitter.com/dcouvering

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