Java application unable to access Blob stream in Oracle after upgrade to 11g
I have faced similar situation for a procedure call with input Blob parameter. Same piece of code was working just fine on 11.2.0.2, but began to throw 
"java.io.IOException: I/O Exception: Connection reset by peer: socket write error"
on 11.2.0.3. I have downgraded from ojdbc6.jar to ojdbc14.jar+ocrs12.jar now it is working. I don't know why but it seems ok for now.