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From Avik Sengupta <a...@apache.org>
Subject RE: Concurrency Issue
Date Fri, 13 Jun 2003 16:41:31 GMT
[moving to poi dev]
I have now confirmed this issue. A simple program reading different xls
files in different threads using different instances of PoifsFileSystem
and HSSFWorkbook fails. 

I am currently unable to say further why this is so, since a quick look
at both POIFSFileSystem and HSSFWorkbook show no instances of static
data. Will look into this further. 

Regards
-
Avik


On Wed, 2003-05-14 at 14:41, Avik Sengupta wrote:
> I do not believe there are static stuff which precludes reading many
> files at a go, but i could be wrong. 
> 
> I would actually guess that one particular file of yours is throwing up
> some pre-existing bug in poi. Have you checked that all the files you
> want to open can be opened sequentially in poi?
> 
> On Tue, 2003-05-13 at 22:38, Vilay.Wadhwa@ubsw.com wrote:
> > Hi Avik,
> > 
> > Thanks a lot for the response.
> > I am creating diff. HSSFWorkBook for diff. uploaded files via diff. threads.
> > But for some reason one of the WorkBook constructor fails.
> > 
> > Can you please let me know if we have any limit on reading the files concurrently
> > or any other part of the code( static stuff ) that may be causing this issue.
> > 
> > By the way, can I have your contact # or do you prefer to have my contact # and

> > we can have a quick chat.
> > 
> > Cheers
> > Vilay
> > 
> > 
> > -----Original Message-----
> > From: Avik Sengupta [mailto:avik@apache.org]
> > Sent: Tuesday, May 13, 2003 5:53 AM
> > To: POI Users List
> > Subject: Re: Concurrency Issue
> > 
> > 
> > you cannot use a single HSSFWorkbook object from more than one thread.
> > you will need to synchronise access to that object. Of course, you can
> > use different HSSFWorkbook objects in different threads concurrently. 
> > 
> > 
> > 
> > On Tue, 2003-05-13 at 02:00, Vilay.Wadhwa@ubsw.com wrote:
> > > Hi Guys,
> > > 
> > > I am having problem reading more than one file Excel files concurrently.
> > > Reading individual files seem to be fine.
> > > 
> > > The exception I get is as follows:
> > > 
> > > java.lang.reflect.InvocationTargetException: java.lang.ArrayIndexOutOfBoundsException
> > > 	at org.apache.poi.util.LittleEndian.getNumber(LittleEndian.java:557)
> > > 	at org.apache.poi.util.LittleEndian.getInt(LittleEndian.java:177)
> > > 	at org.apache.poi.hssf.record.DimensionsRecord.fillFields(DimensionsRecord.java:121)
> > > 	at org.apache.poi.hssf.record.Record.fillFields(Record.java:143)
> > > 	at org.apache.poi.hssf.record.Record.<init>(Record.java:105)
> > > 	at org.apache.poi.hssf.record.DimensionsRecord.<init>(DimensionsRecord.java:94)
> > > 	at java.lang.reflect.Constructor.newInstance(Native Method)
> > > 	at org.apache.poi.hssf.record.RecordFactory.createRecord(RecordFactory.java:254)
> > > 	at org.apache.poi.hssf.record.RecordFactory.createRecords(RecordFactory.java:192)
> > > 	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:191)
> > > 	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:158)
> > > 	
> > > 
> > > 
> > > Your help is highly appreciated.
> > > 
> > > Best Regards,
> > > Vilay
> > > 
> > > Visit our website at http://www.ubswarburg.com
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-- 
Avik Sengupta <avik@apache.org>


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