ODP.NET Oracle.ManagedDataAcess random ORA-12570 errors

Question

I\'m trying to migrate to Oracle.ManagedDataAcess from unmanaged version and receiving randoms ORA-12570 TNS:packet reader failure.

I don\'t know why this error sta

Answer 1

I was receiving this error in an application exception. There were no more helpful details in the inner exception. Changing the pooling options did not fix the issue, nor did disabling pooling. Once tracing was enabled, it showed a different error "ORA-12537 network session end of file" in the trace file (not propagated to the application exception). That thread suggests an old version of the oracle driver is to blame. I checked, and I was using the version from 2014. Upgrading to the 2017/12.2c/12.2.0.1.0 version resolved the issue.