SQLRecoverableException: I/O Exception: Connection reset

Question

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.

Answer 1

We experienced these errors intermittently after upgraded from 11g to 12c and our java was on 1.6.

The fix for us was to upgrade java and jdbc from 6 to 7

export JAVA_HOME='/usr/java1.7'

export CLASSPATH=/u01/app/oracle/product/12.1.0/dbhome_1/jdbc/libojdbc7.jar:$CLASSPATH 

Several days later, still intermittent connection resets.

We ended up removing all the java 7 above. Java 6 was fine. The problem was fixed by adding this to our user bash_profile.

Our groovy scripts that were experiencing the error were using /dev/random on our batch VM server. Below forced java and groovy to use /dev/urandom.

export JAVA_OPTS=" $JAVA_OPTS -Djava.security.egd=file:///dev/urandom "