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ORA-Network




ORA-12545: Connect failed because target host or object does not exist





ORA-12547: TNS: lost contact



ORA-12520: TNS:listener could not find available handler for requested type of server





ORA-19506 ORA-27028 ORA-19511 VxBSACreateObject: Failed with error Server Status: Communication with the server has not been initiated


ORA-02049: timeout: distributed transaction waiting for lock





ORA-12154: TNS: could not resolve the connect identifier specified




ORA-24330: internal OCI error






ORA-12514 tns listener does not



ORA-03106: fatal two-task communication protocol error




connectivity jdbc oracle database




Oracle  network error solution



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