Search notes:

ORA-17008: Closed connection

As per MOS note 2873922.1, the ORA-17008 error typically happens in conjunction with failover activity against a RAC database, especially on a RAC node is brought down from a JAVA application configured to use failover (FCF/Fast Connection Failover).

I was experiencing this error when travelling in a train, using a Hot-Spot connection with SQL Developer (likely as a result of the Hot-Spot loosing its connection to the telcom provider).

Hm‥

set serveroutput on
begin
   dbms_output.put_line(sqlerrm(-17008));
end;
/
ORA-17008: Message 17008 not found;  product=RDBMS; facility=ORA

ORA-17008: Closed connection

See also