Access very large objects using servlets from database

hai,
Please suggest me to access a very large object, for example an image file, from the database using servlets.
Thanks!
null

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hi all
please give the solution for this without using session and application...
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-----------Code in JSP-----------------
In testServlet.java
i tried to get the arraylist object in servlet using request.getAttribute
But I unable to get that arrayObject in servlet.....
So if any one help me out in this, it will be very helpfull to me..
Thanks in Advance
Edward

Hi,
Im also facing the similar problen
pls anybody help..
thax in advance....
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Can we access large objects like CLOB and BLOB using db_link in oracle 10g? I know that it is not possible in oracle 9i and lower version.

user10768613 wrote:
Hi,
Can we access large objects like CLOB and BLOB using db_link in oracle 10g? I know that it is not possible in oracle 9i and lower version.In short No, you still can't.

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Java.io.EOFException while returning a large object using RMI

Hello
I am having an issue with RMI which seems to be quite common (given the given the amount of matches in Google) but for which I can find a way out.
In my application there 2 RMI objects , say OBJECT1 and OBJECT2. For OBJECT1 to get stuff from the database it gives a call to OBJECT2, which in turn fetches it from the DB and provides it back to OBJECT1.
It is in such a call from OBJECT1 that i get the following exception.
Caused by: java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.io.EOFException
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:164)
at CALL FROM OBJECT1
... 13 more
Caused by: java.io.EOFException
at java.io.ObjectInputStream$BlockDataInputStream.readFully(ObjectInputStream.java:2571)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1824)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1759)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1759)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:322)
at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:297)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:146)
... 15 more
The rows retrieved from the DB are stored in a user-defined array (serializable incl. all the subcomponents except for the primitive data fields) and the same is return back from OBJECT2.
Interesting thing is that this exception occurs only when the number of rows retrieved by OBJECT2 is exceeds a certain limit, i.e. when the no. of rows are less the application works perfectly.
Tried the following based on what was mentioned in different posts: Added following parameters to the JVM startup call.
-Dsun.rmi.server.exceptionTrace=true - did not get any pointers
-Dsun.rmi.log.debug=true
-Dsun.rmi.transport.connectionTimeout=600000 - cause the time for the DB query was above the default time of 15 sec
I am using Sun j2sdk1.4.2_13 for the application.
Any pointers to resolve this issue would be greatly appreciated.

ronpg wrote:
The issue is solved by increasing the VM max. memory parameters!if you want to avoid issues like this in the future, check out RMIIO. it provides an api for a "streaming remote iterator" over rmi, so you wouldn't have too read all this data into memory at once (causing memory exhaustion issues).

Access very large objects using servlets from database

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