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Unstable database connection (ORA-12570: Network Session: Unexpected packet read error)

Anthony LarreMar 18 2020 — edited Apr 9 2020

Hi,

We are currently using Oracle.ManagedDataAccess.Core v2.18.3 and facing some issues like these:

Error 1

Oracle.ManagedDataAccess.Client.OracleException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> System.Threading.ThreadAbortException: Thread was being aborted.

Error 2

System.InvalidOperationException: An error ocurred while updating session information with configuration.

---> Oracle.ManagedDataAccess.Client.OracleException: ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException: ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException: ORA-12570: Network Session: Unexpected packet read error

---> System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.

Error 3

Oracle.ManagedDataAccess.Client.OracleException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.

Error 4

Oracle.ManagedDataAccess.Client.OracleException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x80004005): ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException (0x000030F9): ORA-12537: Network Session: End of file

Current resolution: restart the IIS Application Pool.

After investigation, we found some discussion about the almost same error https://stackoverflow.com/questions/35352060/odp-net-oracle-manageddataacess-random-ora-12570-errors/35369594#35369594

I would like to know if you are aware about this kind of issue ?

We already update the version to 2.18.6 and recently the latest 2.19.60.

Can you tell us if a correction has been made within it ?

Regards,

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Added on Mar 18 2020
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