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RE: Problems starting ozone ?

Hi Falko,

thanks I'll try this asap :)

I've got another one error: after storing a pretty large XML file (about
2000 elements) using SAX instead of DOM version of ozone samples now I have
to query the node using XPath.
After a few attempts ( using the sample first and replace XPath processor
with Xalan after ..) I got the following error:

[warn] (473) Transaction: invokeObject()
    java.lang.ArrayIndexOutOfBoundsException
        at
org.ozoneDB.core.AbstractObjectContainer.invokeTarget(AbstractObje
            ctContainer.java:197)
        at org.ozoneDB.core.Transaction.invokeObject(Transaction.java:462)
        at org.ozoneDB.core.DbRemote.DbInvoke.perform(DbInvoke.java:62)
        at org.ozoneDB.core.Transaction.performCommand(Transaction.java:227)
        at
org.ozoneDB.core.TransactionManager.performCommand(TransactionManager.java:3
30)
        at
org.ozoneDB.core.TransactionManager.completeTransaction(TransactionManager.j
ava:299)
        at
org.ozoneDB.core.TransactionManager.handleCommand(TransactionManager.java:21
7)
        at
org.ozoneDB.core.InvokeServer.handleClientEvent(InvokeServer.java:78)
        at
org.ozoneDB.DxLib.net.DxMultiServerClient.run(DxMultiServerClient.java:38)
        at java.lang.Thread.run(Unknown Source)
[warn] (473) Transaction: ta(-114): uncaught exception:
(org.ozoneDB.OzoneInternalExc: java.lang.ArrayIndexOutOfBoundsException)
    org.ozoneDB.OzoneInternalExc: java.lang.ArrayIndexOutOfBoundsException

        at org.ozoneDB.core.Transaction.invokeObject(Transaction.java:489)
        at org.ozoneDB.core.DbRemote.DbInvoke.perform(DbInvoke.java:62)
        at org.ozoneDB.core.Transaction.performCommand(Transaction.java:227)
        at
org.ozoneDB.core.TransactionManager.performCommand(TransactionManager.java:3
30)
        at
org.ozoneDB.core.TransactionManager.completeTransaction(TransactionManager.j
ava:299)
        at
org.ozoneDB.core.TransactionManager.handleCommand(TransactionManager.java:21
7)
        at
org.ozoneDB.core.InvokeServer.handleClientEvent(InvokeServer.java:78)
        at
org.ozoneDB.DxLib.net.DxMultiServerClient.run(DxMultiServerClient.java:38)
        at java.lang.Thread.run(Unknown Source)
[info] (473) InvokeServer: connection closed (user: zucca)

I think this is due to a poor XML parser implementation, do you agree ?
Is it possible to use Xerces parser in ozone ?

Bye
Mario

P.S. If I use xalan and xerces alone (coming with the Xalan 1.2
implementation) all is working

-----Original Message-----
From: Falko Braeutigam [mailto:falko@smb-tec.com]
Sent: martedì 22 agosto 2000 3.27
To: ozone-users@ozone-db.org
Subject: RE: Problems starting ozone ?


On Tue, 22 Aug 2000, Zucca Mario wrote:
> Hi Falko,
> Now I'm back on-line.
> In the <ozone db> there is a ostab directory with a lot of files:2400 , is
> it OK ?
> There is a file named tab.rootTable (1k) and the others are named tab.*
and
> 5k each one, the total size of the directory is about 18 Mb.
Yes, this is OK.

The ostab dir contains the object ID table. ozone uses a DxDiskHashtable,
which
in fact is a B-tree, for this. The sub-tables of the B-tree have 255 entries
(8bit). Therefore there are many small files.

BTW: There is a new version of the DiskHashtable in CVS that supports
adjustable
sub-table sizes. The CVS version of ozone uses now 11/10 bit sub-tables,
which
reduces the number of files by a factor of 6. Besides, the new DiskHashtable
compresses sub-tables before storing on disk, which reduces the size of the
ostab dir by a factor of 6. ;)

Anyway, your ostab version produces many small files. This is ok. This
should
not cause the problems you reported.

> I can't understand why ozone is unable to open the object ID table. I'm
> working on Windows 2000 server and Java 1.3 from Sun
I've checked in a new version of
org/ozoneDB/core/wizardStore/WizardStore.java
that displays not only the "no valid id table found" message but also the
exception that was thrown. Please compile CVS version (or use attached file
in
your 0.5.5 source tree) and start server with option -debug and send the
server
output.


Falko
-- 
______________________________________________________________________
Falko Braeutigam                              mailto:falko@smb-tec.com
SMB GmbH                                        http://www.smb-tec.com