Status : Failure - Test failed : IO Error : Got minus one from a read call

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One of my colleague reported he is facing issue while trying to connect  instance from back-end using sql-developer.

Issue :
Status : Failure - Test failed : IO Error : Got minus one from a read call


Solution : 
After changing a parameter "tcp.validnode_checking" in sqlnet.ora file, this issue is resolved and can connect from back-end successfully.

Before change


 After change











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