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Getting IO Error: The Network Adapter could not establish error error while connecting to the DB

Albert ChaoNov 6 2021

tnsnames.ora file

# tnsnames.ora Network Configuration File: C:\app\Vinay\product\18.0.0\dbhomeXE\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.


XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = LAPTOP-2HN15HQU)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XEPDB1)
    )
  )


LISTENER_XE =
  (ADDRESS = (PROTOCOL = TCP)(HOST = LAPTOP-2HN15HQU)(PORT = 1521))




ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )
  

listener.ora

# listener.ora Network Configuration File: C:\app\Vinay\product\18.0.0\dbhomeXE\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.


DEFAULT_SERVICE_LISTENER = XE


SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\app\Vinay\product\18.0.0\dbhomeXE)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\app\Vinay\product\18.0.0\dbhomeXE\bin\oraclr18.dll")
    )
  )


LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = LAPTOP-2HN15HQU)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )


DB Connection

<img src="https://objectstorage.us-phoenix-1.oraclecloud.com/p/BqK85Rn1zA5MP0vYiqbAdPgs7Z6OmMxw8SD3WCFVm5kY8uReidZ1KPIKkgJ1hCkG/n/axciphqpnohg/b/forums-legacy/o/uploads/7Y2PVBA1RTOQ/image.png" alt="image.png"><img src="https://objectstorage.us-phoenix-1.oraclecloud.com/p/BqK85Rn1zA5MP0vYiqbAdPgs7Z6OmMxw8SD3WCFVm5kY8uReidZ1KPIKkgJ1hCkG/n/axciphqpnohg/b/forums-legacy/o/uploads/C3VTSVCP61M4/image.png" alt="image.png">I tried running the lsnrctl but still not able to connect to the DB.

<img src="https://objectstorage.us-phoenix-1.oraclecloud.com/p/BqK85Rn1zA5MP0vYiqbAdPgs7Z6OmMxw8SD3WCFVm5kY8uReidZ1KPIKkgJ1hCkG/n/axciphqpnohg/b/forums-legacy/o/uploads/DNR8TAAXGQZ7/image.png" alt="image.png">



This post has been answered by Solomon Yakobson on Nov 6 2021
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Added on Nov 6 2021
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