IO Error: The Network Adapter could not establish the connection

IO Error: The Network Adapter could not establish the connection

io error: the network adapter could not establish the connection vendor code 17002
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io error: the network adapter could not establish the connection oem 13c
the network adapter could not establish the connection sql developer 17002
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oracle.net.ns.netexception: the network adapter could not establish the connection
io exception: the network adapter could not establish the connection in jdeveloper

I am new to Oracle, and am trying to run a simple example code with Java, but am getting this error when executing the code.. I am able to start up the listener via CMD and am also able to run SQL Plus. Can anyone give me a hand and tell me what I might be doing wrong?

Update: I am using JDBC.

Database is local, and I actually had it working but it stopped working just today. I'm not really sure why though. Would you mind giving me some procedures to follow by since I don't know much.


Either:

  1. The database isn't running
  2. You got the URL wrong
  3. There is a firewall in the way.

(This strange error message is produced by Oracle's JDBC driver when it can't connect to the database server. 'Network adapter' appears to refer to some component of their code, which isn't very useful. Real network adapters (NICs) don't establish connections at all: TCP protocol stacks do that. It would have been a lot more useful if they had just let the original ConnectException be thrown, or at least used its error message and let it appear in the stack trace.)

IO Error: The network adapter could not establish the connection, Re: IO Error: The network adapter could not establish the connection. In that folder there should be a tnsnames. ora, if the Oracle DB is on the same machine you may want to copy the contents of database tnsnames folder to the TNS_ADMIN folder or as suggested change the environment variable. How to Fix ‘IO Error: The Network Adapter Could not Establish the Connection’ on Oracle SQL? If the issue is with your Computer or a Laptop you should try using Reimage Plus which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption.


Oracle Database Tutorial 70: IO ERROR: The network adapter could , IO ERROR: The network adapter could not establish the connection Learn how to solve this Duration: 3:34 Posted: May 26, 2015 Below are steps that are needed to fix the IO ERROR: The network adapter could not establish the connection: First check the Firewall and network related issues. Check if Oracle Listener service is available and running.


Another thing you might want to check that the listener.ora file matches the way you are trying to connect to the DB. If you were connecting via a localhost reference and your listener.ora file got changed from:

HOST = localhost

to

HOST = 192.168.XX.XX

then this can cause the error that you had unless you update your hosts file to accommodate for this. Someone might have made this change to allow for remote connections to the DB from other machines.

How to Fix The Network Adapter Could Not Establish The , How to Fix The Network Adapter Could Not Establish The Connection in Oracle SQL Developer Duration: 1:31 Posted: Oct 19, 2017 First of all to solve “The network adapter could not establish the connection” error, check whether you have entered the correct username and password as well as the correct Hostname and Port number. Though these are small things we cannot avoid them.


I figured out that in my case, my database was in different subnet than the subnet from where i was trying to access the db.

How to Fix 'IO Error: The Network Adapter Could not Establish the , Quite recently, there have been many reports of an “IO Error: The Network Adapter Could Not Establish The Connection” Error while testing a  java.sql.SQLException: Io exception: The Network Adapter could not establish the connection. How do I resolve this Network Adapter could not establish the connection error? Answer: Whenever you see a Network Adapter could not establish the connection, you have either the wrong SQL Developer URL or you have a basic SQL*Net connectivity issue


To resolve the Network Adapter Error I had to remove the - in the name of the computer name.

Oracle Network Adapter could not establish the connection tips, Question: I am trying to install SQL Developer and when I try to open the forst screen and connect I get this network adapter error: java.sql.SQLException: Io  Failure - Test failed: The Network Adapter could not establish the connection. I have the following information: Port 1521 is not open for either server when I telnet. My listener is up and running for both. I can access derp-db.derp.edu on Oracle SQL Developer. Oracle client is on my local machine + Oracle SQL Developer.


Oracle SQL Developer: Failure, This didn't fix it. EDIT2: I cannot telnet into derp-db.derp.edu on port 1521. But I can still connect to it with SQL Developer  Re: IO Error: The Network Adapter could not establish the connection 714235 Sep 2, 2011 9:50 PM ( in response to 714235 ) Thanks @sb92075 Corrected the ip and it worked.


Vendor code 17002 to connect to SQLDeveloper, ” error, check whether you have entered the correct username and password as well as the correct Hostname and Port number. ora file check for Host and Port entry in Listener tag for valid hostname and port number. Also, when I open SQL Developer, i get a message saying Im using a java version that is not supported by Oracle Database, Im using java 1.8 and it says I should use from 1.6 to 1.7 only. im not sure if that is causing something bad but it seems fine because I can go further using the SQL Dev.


Oracle Net Listener Parameters in the listener.ora File, " is the equivalent of the ORA-12541 error: It's most likely that your listener is down, or has an improper port or service name. IO error: the network adapter could not establish connection. Oracle DB to AppDynamics controller I have configured the DB collector with the Ip address, Service Name, and Listener ports along with a user with required permission.