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If you are experiencing sqldeveloper error, this guide may help you. This error usually means that one of the hosts, port, sid / service is the worst, or that there is a network problem.

 

 

Hi guys! Has anyone encountered TNS IO error with “The network card could not complete all connections”? when you try to reconnect in SQL Developer or connect to a database using SQL * Plus Editor. If so, then you have come to the right place, because here on this blog, I will show you how to fix this error.

So, without further ado, let’s fix your tricky TNS error.

Step 1. Make Sure Your Entries Are Correct

To resolve the “The network adapter system failed to connect” error, first make sure you entered the correct username and password, and the correct username, correct host, and port number. Although this has turned into small things, we cannot avoid it. After all, in other respects, little things are more important.

[bctt tweet = “How to resolve the” Network adapter failed to connect “error in just a few steps” username = “RebellionRider”]

You can check the listener for a valid hostname and port number. If the client has access to your server, the auditor is definitelyIt is run by the server process. In fact, if you don’t have access to the listener.ora directive, you can look at the tnsnames.ora file.

In the request for the Listener.ora file, ensure that the host port entry in the listen tag matches a valid hostname and port number.

And if you are indeed using the TNSnames.ora file to check the hostname and port number, find an entry that has the same concept as your SID, and then check the host and number input port in the particular tag used.

Try logging in now. If all this solves your problem, you can skip our next step. But if the error “The network adapter cannot connect” was still there, don’t worry, just take the next step.

Step 2. Are Your Audience Resting?

If the problem persists and you haven’t fixed this nasty bug, chances are your listener isn’t working. To check if the Listener is running or not, just open a new command prompt with administrator privileges and type

This command tells you the status of your phone. Obviously, if the output of this advisory command looks like In the image below, this is preventing your listener from starting. After that, you need to start the earphone.

This will grab the attention of your viewers and will probably solve your problem.

Information Byte:
If you are having trouble starting the listener, first try the “OracleOraDb11g_home1TNSListener” Windows service. To do this, open the run command and write services.msc, this will make your service panel responsive. Find the same person here and right click to launch it.

That’s all you need. This should fix the “adapter cannot establish a connection” network error. May the force be with you. Have some fun.

Also click here to learn how to complete the initial operational setup of Orcale Enterprise Manager for use.

If you agree, share it on your social network and help me attract more people. If you use other requests, please contact mnoah on my Facebook and Twitter page. Thanks guys and have a nice day!

Frequently Asked Questions For SQL Developers

Problem

Please note that I have changed the data for security reasons. However, the problem remains intact.

I have installed Oracle 11g on a site server like herp-devDV.derp.edu.Now I have another Oracle 11g database on the site server, say derp-db.derp.edu.

I usually used the login, username, password, and hostname entered in addition to the service name in Oracle SQL for herp-devDV.derp.edu and derp- db.derp.edu. I might have wanted to connect to the schema at derp-db.derp.edu, but failed at herp-devDV.derp.edu. This gives me this message:

Error

  - test failed: network card cannot establish a connection 

Details

• Port 1521 is not open for any of the servers when I use telnet.
• My pipe is ready for a few.
• I can access Oracle SQL Developer at derp-db.derp.edu.
• The Oracle client is installed on my Oracle + SQL Developer professional machine.
• I have the ability to run a remote desktop onon both servers.

What I Have Is Ready

• google search
• Stack Overflow
• Stop and start lnrctl requires
• At herp-devDB.derp.edu I have the status lsnrctl

. executed

  Connect to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521)))AUDITOR STATUS------------------------Also known as LISTENINGTNSLSNR Version for 64-bit Windows: Version 11.2.0.1.0 - ProductionStart date 06.03.2014 13:37:22Working time 6 days approximately 0 hours. 53 minutes 4 secondsTrace level disabledSecurity ON: Local Operating System AuthenticationSNMP disabledListener settings file D:  oracle  product  11.2.0  dbhome_1  network  admin  listener.Log oralistener file d:  oracle  diag  tnslsnr  HERP-DEVDB  listener  alert  log.xmlEndpoint Listening Summary ...  (DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (PIPENAME = .  Pipe  EXTPROC1521ipc)))  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp) (HTE = HERP-DEVDB.derp.edu) (PORT = 1521)))Brief description of services ...Service "CLRExtProc" has 1 instance (s).  Instance "CLRExtProc", status unknown, one or more managers for this service ...The "HERPDEVDBXDB" service has only one or more instances.  Herp instancedevdb, READY, status has one or more individual managers for this service ...The herpdevdb service has 8 instances.  The instance of herpdevdb, READY, status has 1 manager (s) for this service ...The completed request was successful 

  SID_LIST_LISTENER =  (SID_LIST =    (SID_DESC =      (SID_NAME = CLRExtProc)      (ORACLE_HOME = D:  oracle  product  11.2.0  dbhome_1)      (PROGRAM Extproc) = (ENVS corresponds to "EXTPROC_DLLS = ONLY: D:  oracle  product  11.2.0  dbhome_1  bin  oracr11.dll")    )  )LISTENING =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = = (IPC Protocol) (KEY means EXTPROC1521))      (ADDRESS implies = (TCP protocol) (HOST = HERP-DEVDB.derp.edu) (PORT corresponds to 1521))    )  ) 

At this point, I admit I’m ruining my head because I can’t find anything that stands out and tell myself why something that shouldn’t work.

The only clue is when I check derp-db.derp.edu and move the lsnrctl status command. Pleasesee excerpt below:

  connect to (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HTE = DERP-DB.edu) (PORT = 1521)))LISTENING STATE------------------------Also known as LISTENINGTNSLSNR version for 64-bit Windows: Version 11.2.0.3.0 - Date of manufactureStart 18-MAY-2014 02:19:01Accessible22 days 12 hours 23 minutes secRoute 18 on the upper levelSecurity ON: Local Operating System AuthenticationSNMP disabled--- Etc ---- 

I scratch my head incredibly. Why does derp-db have to connect to DERP-DB.edu while herp-devDB usually connect to EXTPROC1521? à How can I do this? Listener.ora and other files of these products between the two servers are almost identical, except of course for the instance names.HM.

• EDIT1: I changed listener.ora to herp. This didn’t fix the problem.

• EDIT2: I really can’t telnet to port 1521 in derp-db.derp.edu. But can I connect it to SQL Developer? Which ?

• EDIT3 I also cannot create herp-devdb.derp.edu on port 1521 via Telnet.
• EDIT4 I am unable to ping the IP addresses of the two internet hosting servers.

 

 

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