Re: Store being constructed on deleted area

[Tobias Downer <toby@xxxxxxxxx>]

Hi Nicolas,

See my comments below;

Nicolas Carranza wrote:
> Hello. I'm heavy testing my application and I'm getting this:
> ---- debug.log ----
> ...
> % Dropped: 11574nicarran_ejb_CustomField
> % Dropped: 11573nicarran_ejb_CustomField
> % Dropped: 11576nicarran_ejb_CustomField
> % java.io.IOException: Store being constructed on deleted area.
>     at 
> com.mckoi.store.AbstractStore$StoreArea.<init>(AbstractStore.java:1513)
>     at com.mckoi.store.AbstractStore.getArea(AbstractStore.java:1406)
>     at 
> com.mckoi.database.IndexSetStore$MappedListBlock.getArray(IndexSetStore.java:1022) 
> 
>     at 
> com.mckoi.util.BlockIntegerList$IntArrayListBlock.searchFirst(BlockIntegerList.java:356) 
> 
>     at 
> com.mckoi.util.AbstractBlockIntegerList.searchFirst(AbstractBlockIntegerList.java:1049) 
> 
> ---- debug.log ----
> What does this mean?
> And after a while the mckoi db appers to be locked. It does not respond 
> to clients.
> Is it my app doing something wrong or is it mckoi?

 From the stack trace, it looks like the index of one of your tables has 
become corrupt.  I suggest running the repair tool on the database to 
fix the problem.  To do this, use the following command (one line);

   Java -cp mckoidb.jar com.mckoi.tools.DBConglomerateRepairTool -path 
[path to your database data directory]

Before you run the repair tool, make sure that you backup the database 
files.

The usual reason why this happens is because there are multiple Java 
Virtual Machines that are running their own copies of Mckoi DB and 
accessing the database at the same time.  This can cause corruption to 
occur.  When you start the database server, you must ensure that you 
only access the database server through a JDBC connection to the server 
(for example, "jdbc:mckoi://mydatabaseserver.com/") and not through an 
embedded connection (for example, "jdbc:mckoi:local://path/to/db.conf") 
when you connect to it.


> The last lines of my debug.log are:
> ----
> ...
> [ TIME: Sat Apr 24 02:48:27 COT 2004 ]
> % java.net.SocketException: Socket closed
>     at java.net.SocketInputStream.socketRead0(Native Method)
>     at java.net.SocketInputStream.read(SocketInputStream.java:129)

This does not indicate a problem with your setup.  These messages occur 
when a client connection to the server is terminated.  This error will 
be downgraded to a warning to prevent the trace appearing in the logs in 
the future.

Toby.