Intermittent: "The Network Adapter could not establish the connection"
kirkladbJan 17 2013 — edited Nov 20 2014Connecting via Java ODBC from Windows 32-Bit server to Oracle Database Server. Currently using ojdbc14.jar & classes12.jar files to connect to database. Was working fine before Oracle was upgraded from 10.1.0.5 to 11.2.0.3. Now, intermittently I get the error: The Network Adapter could not establish connection. I can't reproduce the issue via ping -n 10 -l 64 <database ip address>...no packets lost. traceroute gives nothing major. I was wondering if the issue could be caused by the fact that Oracle 11gR2 only certifies J2SE 5.0 and newer drivers and I am using the drivers certified with Oracle 10g. I've seen some folks say that it should work, but I wanted to put it out there to see if others may have experienced intermittent issues until upgrading the java. I've downloaded the jdk1_5_22 as well as the ojdbc5.jar files but I need some proof to justify installing them....thanks.