Oracle 9.2.0.8 Binary Data Problem

Hi Folks,
need some advice from the experts here about an error I got yesterday while installing a (Java-based) Software at a customer using Oracle 9.2.0.8.
While being able to work with the database most of the time, I get an error when trying to save binary data. Unfortunately I don't have access to the DB-logs, so I hope the log I have may raise a thought or two from anybody and that may help me bring some light into the darkness I'm poking in at the moment.
<log>
java.sql.SQLException: No more data to read from socket
     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
     at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1160)
     at oracle.jdbc.ttc7.MAREngine.unmarshalUB1(MAREngine.java:962)
     at oracle.jdbc.ttc7.MAREngine.unmarshalSB1(MAREngine.java:894)
     at oracle.jdbc.ttc7.Oclose.receive(Oclose.java:103)
     at oracle.jdbc.ttc7.TTC7Protocol.close(TTC7Protocol.java:693)
     at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:731)
     at oracle.jdbc.driver.OraclePreparedStatement.privateClose(OraclePreparedStatement.java:535)
     at oracle.jdbc.driver.OraclePreparedStatement.close(OraclePreparedStatement.java:440)
     at org.apache.tomcat.dbcp.dbcp.DelegatingStatement.close(DelegatingStatement.java:168)
</log>
I searched around and got some results about
- codepage: The DBA told me that the DB is using "cp1252", so I tried to use both ISO-8859-1 and UTF-8 (both are supported by the application)
- Session Management: Tried to raise/decrease the limits for idle/maximum connections and the DBA told me to set the parameter "SESSION_CACHED_CURSORS=0", but unfortunately this is not possible when using a connection URL "jdbc:oracle:thin:@..."
So... if anybody has an idea what to check or ask the DBA to change or almost anything, I'd kindly welcome the feedback.
Thanks,
enni

Hi Sybrand,
thank you for your clarification for the codepage!
And no, I don't think that I found a new issue, just wasn't able to find a good answer on the net and after trying to get an evaluation copy (just for the install and first tests) of Oracle 9, the support told me "No way.".
And yes, you're definitely right, it should be buried.
But we all know that there are companies out there that allow new applications tests on thier "good'old" DB. Guess that is exactly what happens here.
Maybe somebody else reads this and had similiar problems in the past, so I keep this "open" for just some more time.
Thanks,
have a good time!
enni

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I got the above detail using the DUMP sql function.

Horizontal scaling, with large amounts of binary data

question about horizontal scaling. tried asking late last night, but no one was active. Basically, I have an app that needs to scale (by adding new machines all talking to a database in the backend). This is all fine, but I have some binary file storage requirements for the app (files over 80 megs in size). This introduces a concurency issue, as I can't store this binary data on any of the individual server (because then it will be on one, and not all, leaving the app in an inconsistent state). So where do I store the data to enforce a consistent state? Have the individual apps FTP the file to a central location?
I am trying to avoid storing binary data in the database; Does anyone have any suggestions on how to address this problem?

I understand why you are trying to avoid storing binary data in a database but if you need to ensure that this data cannot be modified without the appropriate restrictions then using a database might make sense. You could even have a separate database just for the binary data because you will need to ensure you get the block sizing correct. Also, some databases might be better than others in this case. For example Oracle is likely to be significantly better than MySQL.
If you do want to use files then you need to put the file in a central location and enforce locking the file to prevent concurrent modification. You can probably tie into a protocol that automatically handles this for you.

How to upload large binary data to dB so it can be read by any app?

Hi everyone,
Short version: how do you upload binary data into a MySQL blob field in such a way that it can be read by any application?
Long version:
I've been struggling with the problem of putting files into database BLOB fields. (MySQL and Database Connectivity Toolkit).
I was initially building a query string and executing the query but was finding that certain binary characters were causing failures (end of string terminators, etc...) So, a working solution was to encode the binary string, and that worked fine, although bloated the dB a fair bit. I could decode in LabVIEW and then save the file as needed.
Now, the customer wants to be able to save the files using other apps, including the MySQL Query Browser, so an encoded file is no good.
I found using a parametrized query allows me to put the unencoded string into the dB, but it appends a 4-byte length at the front of the BLOB before it inserts it into the dB. Some apps ignore these 4-bytes (such as .pdf) but most do not.
A related thread on NI discussion forums: http://forums.ni.com/ni/board/message?boar...ssage.id=354361 has no solution, and my support ticket at NI has been ongoing without answer for a while.
Thanks,
Ben

The problem is the DCT. Using ADO it is fairly easy to insert binary data into a BLOB field. I have not tried it in MySQL, but it works fine in SQL Server, Oracle, Firebird and other free/open source databases I have tried. To get you started, see this thread.
Mike...
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Need to convert the binary data in blob field to readable format

Hi,
We need to convert the Binary data in the BLOB field to readable format and need to display it in Oracle Apps Environment,does anybody come across the similar requirement.
please advise, thanks in advance.
Regards,
Babu.

You could use standard Attachments functionality here ... if the blob is not in FND_LOBS, insert into FND_LOBS, fnd_attached_documents etc to enable viewing via "Attachments" to the entity the blob is related to.
Gareth

How to extract binary data from a File?

Hello there!
Hope I'm right here.
I have a slight problem with a file containing text- and binary-data. At the beginning of the file is only some text followed by some html-code and at the end is some binary stuff like a pdf oder an image (jpg/gif).
My problem is now how to split these parts and save them in the suitable format. The text and the html are no problem, but I don't know how to extract the binary data. I tried it out with an Inputstream, but I don't know how to find the exact position where the binary data begins.
Anyone have an idea how I can solve this?
Thanks in advance and sorry for my bad english.

I don't believe a bullet-proof solution exists.
If you know where the HTML ends, you may skip whitespace and then assume the rest is binary data. Or, if you know the first bytes of the binary data, you may locate those. With either of these solutions, though, you risk coming across a file where it doesn't work as expected, for example if the first byte of the binary data happens to match a whitespace character.

Oracle 9.2.0.8 Binary Data Problem

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