Yesterday evening I left the office with a running Java program written by me. It should insert a lot of records into our company database (Oracle) using a JDBC connection. This morning when I came back to work I saw this error (caught by a try-catch):
java.sql.SQLRecoverableException: I/O Exception: Connection reset
The program wrote almost all records before getting this problem, but what if it happens early (just minutes after I leave the office at evening)? I cannot understand what happened, I contacted my database admin and he said there was no particular issue on the database.
Any idea on what happened and what can I do do to avoid it?
This simply means that something in the backend ( DBMS ) decided to stop working due to unavailability of resources etc.
It has nothing to do with your code or the number of inserts.
You can read more about similar problems here:
This may not answer your question, but you will get an idea of why it might be happening. You could further discuss with your DBA and see if there is something specific in your case.