I connect to a database with read only access using SQL developer. It's a TNS connection. I use a tnsnames.ora, forwarding port script and SQL Developer.
In the past, occasionally, when connecting, I get a error message
Got a minus one from a read call.
Vendor Code 0
If I do a reboot, it goes away. Another friend suggested changed the forwarding port which worked for him.
I recently upgraded to a new computer and now it seems that I am getting the error message consistently. Reboot or changing forwarding port does not help at all.
The port forwarding script contains something like this
putty -L (port):(machine name):1521
Does anybody have any idea? Thanks.
My port forwarding script forwards multiple ports. Somehow separating them into 2 smaller file, this error went away.
Check your sqlnet.ora file and comment if there is any entry like the below.
tcp.validnode_checking = yes
tcp.invited_nodes=(<hostname_1>, <hostname_2>)
Now reload your listener and check the connectivity from SQL Developer.
lsnrctl reload <SID>
Related
After rebooting my Windows Server 2016 Standard (SQL Server 2016) my SSIS process that runs this query:
select * from openquery(HRMPROD, 'SELECT QUERY HERE' )
started failing with this error:
I get the same error if I try to run the query in SSMS. I have the same linked server set up on my test instance and the query is successful when I run it there. I have compared the linked server create script on both instances and it is the same.
Any idea where I should look for what is causing the connection issue on the one server but not the other?
Thank you.
Saying the answer is on the Oracle side is just like pointing fingers across the way. Let's just fix the issue here.
There is a connection string that is used from SSIS, (which you also used in SSMS) The connection string contains three main components to connect and would result in the 12154 error if any of them were incorrect:
Host
Instance name (different than Instance on Sql Server, think database name)
port
The port most likely hasn't change, neither has the database name, but the host...No, hasn't changed, but the DNS server used to connect most likely has! I would ping the host and see what returns from the SSIS and your SSMS host that you're using. I would expect it to fail. Find out what IP address the host is using and ping that - see if it returns. I'm guessing that's the change that needs to be updated or your Network folks need to fix a DNS configuration/server issue.
Hope this helps!
Kellyn
Since you are getting a response from the TNS Listener, the problem lies on the Oracle side. See Architecture of Oracle Network Services for an overview of how the Oracle networking handles things. Keep in mind that based on the error message you've reached the TNS Listener, so you only need to check things between TNS and the Oracle database... In other words, your networking and SQL Server settings are fine or you wouldn't be able to get this error message.
I would agree with above that the issue might have to do with the network. I have come across that a few times, where we can set everything up, but a firewall is blocking communication between the two servers.
Open up powershell on the new server and run a tracert to the target to see the hops and identify if is connecting across the network.
If it is, then run a test-netconnect on the specific port, to see if the port is open from the firewalls.
Cheers!
We have an Oracle server set up and are using TCP with SSL as connection. This setup was made with the assistant wizard and we used the default settings pretty much everywhere (which also means that no tnsnames.ora or listener.ora exist). lsnrctl status shows that the correct ports are listening.
We are trying to connect to this database via DBeaver and SQuirrel SQL but cannot get it to work. We have set the vmargs for the programs to contain the certificate of the server (e.g. dbeaver.exe -vmargs -Djavax.net.ssl.trustStore=C:/...keystore.jks -Djavax.net.ssl.trustStorePassword=password -Djavax.net.ssl.trustStoreType=JKS), which works fine.
Connecting to the database with a concrete JDBC URL string (jdbc:oracle:thin:#(DESCRIPTION=(ADDRESS=(PROTOCOL=TCPS)(HOST=IP)(PORT=5500))(CONNECT_DATA=(SERVICE_NAME=testdb)))) does not work and times out after 60 seconds without a proper error (IO Error: Got minus one from a read call). We have tried pretty much everything and cannot get it to work.
The ports are correctly assigned, the database can successfully get accessed with the normal TCP protocol and port 1521.jdbc:oracle:thin:#(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=IP)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=testdb)))
Are we missing steps? There don't seem to be any firewall issues. The certificates seem to be working fine as well, but we cannot connect with any of the programs (or sqlplus via command line).
Anyone know what could be the problem? Thanks!
Can you check out the SSL blog or our OTN page for step-by-step instructions? If you are using TLSv1.2 then the JDK version and JDBC driver versions are very important.
In the end I got it to work. There are various sites online that show you how it's done. I used this one:
https://database.edorex.ch/blog/database-connection-with-a-certificate/
Getting the wallets set up, certificates set up and the user set up in the database were the most important steps. Additionally, I had to separate the server and client machines. The server is now on a VM and it works that way, I couldn't get it to work having both on the same machine.
Some context: I'm setting up an environment to run some Ruby code our Lead wrote to connect to some remote Databases. I'm using Win10 and have WSL installed. I have installed SQL*Plus, docker, and Ruby, and am sure I have installed all the dependent gems (actually at this point I know for a fact its not a ruby problem). I'm using Docker to use a pre-built image of an Oracle Database, and I have populated it with data.
Obfuscated company DB information:
'Broken' DB (TNS no listener)
Username: W-WORK-DEV
Password: password
Host: host1
Port: 999
SID: W-WORK-DB.tech.company
'Working' DB (can connect just fine)
Username: C-OLD-DEV
Password: password
Host: host2
Port: 999
SID: C-OLD-DB.tech.company
Please note the names I have provided here are purely for obfuscation, they do not represent anything about age or even config. They are essentially the same, just different databases on different hosts. Also note this is a corporate company and would have a lot of base infrastructure for their internal network.
The issue I am having is that with the specific database I am working on, I cannot connect to it. I connect to the company intranet via a VPN (I work offsite) and have issues connecting to WORK-DB.tech.company, though I can connect to C-OLD-DB.tech.company. Methods I have tried to connect with:
Oracle SQL Developer
I have inputted all the correct jdbc strings and username / password. Have even asked other people to attempt to connect (at least 3 others). They can all access C-OLD-DB as well as W-WORK-DB. When using this method, I get The network adapter could not establish the connection.
Side note: I'm fairly sure I have connected to the DB just fine in the past, though I can't be certain because I'm fairly new to this team and have only accessed it once, if that.
SQL*Plus via WSL
I installed SQL*Plus because I think Ruby was accessing it in some capacity when running the script. I got to the point where the script was able to connect to my local docker Database, but when it tried to connect to the remote database, it would return TNS: no listener. I attempted this using sqlplus as well and got the same error.
Example:
sqlplus C-OLD-DEV/password#host2:999/C-OLD-DB.tech.company
This command works and connected to the DB jsut fine.
sqlplus W-WORK-DEV/password#host1:999/W-WORK-DB.tech.company
This command gave me TNS: no listener.
During my research I had found mentions about tnsnames.ora, sqlnet.ora, and listener.ora. I have found relevant files around the company intranet and attempted to use them in my own personal environment to no avail (one of the sqlnet.ora files actually stopped me from being able to connect to any) I found mention about a config/database.yml file related to ruby, but our code already has the database information set up and I seem to be getting to the same solution as the script when trying to manually connect via sqlplus.
Here are some relevant environment variables I have set up when doing these installs. I'm thinking that at some point when trying to set up my environment, I messed up some config that changed the way sqldeveloper or sql plus would connect to that database.
$ echo $ORACLE_HOME: /usr/lib/oracle/12.2/client64/
$ echo $TNS_ADMIN: /usr/lib/oracle/12.2/client64/network/admin
$ echo $LD_LIBRARY_PATH: /usr/lib/oracle/12.2/client64/lib
I hope I have provided all the information I have come across and have explained clearly what my issue is, if you have any questions feel free to comment about it so I can clear it up. Thank you for any and all your help.
So my problem ended up being a 'firewall/port' issue. In the end i found out that specific port I was connecting to was blocked, but I thought it was only on my system. Turns out the VPN I'm using was the issue blocking that port. Company has a Primary Data Center and a Secondary one, and apparently the SDC VPN was blocking that port from me. I switched to using the PDC VPN and it worked.
Are you using the 64 bit jdbc drivers?
I'm trying to log into my FTP account through Notepad++ but I cant get it to connect for the life of me. I know the password and hostname are correct because it works fine in filezilla.
I get the following info in the output:
-> TYPE I
Connecting
-> Quit
Unable to connect
Disconnected
I'm using
NPPv6.5.4
NppFTPv0.24.1
Incase it matters, the hostname is through awardspace.net dck.dx.am connection mode is passive, transfer mode is binary, everything else is default...
Thanks in advance for the help,
Dave
I'm getting the same results. The plugin worked before, it looks it is now broken. Starting as admin doesn't help, too. Maybe you can downgrade it to some older version and retry. If someone has time, he can fill a support request directly at NPP FTP homepage. As problems with this plugin are frequent, I switched to a different solution - see the second paragraph of that post.
EDIT: I've made some plugin diagnostics, please follow here.
Connecting
-> Quit
Unable to connect
No more explanation of the error.
The reason was, remote machine doesn’t allow FTP connections at all!
So Use sftp (select from connetion type)
this will work
I'm trying to access an Oracle database on an old server we inherited for a client.
I'm confident I have the Oracle database and listener started and working, but when trying to access sqlplus or the exp commands, I'm getting the following error:
ORA-12162: TNS:net service name is incorrectly specified
I have edited the tnsnames.ora file to change the host to 127.0.0.1 rather than an external URL and I am able to successfully tnsping my connection, but am not getting much further.
Try setting the Oracle SID
set ORACLE_SID=database name
export ORACLE_SID=bvteng worked for me, where bvteng was the service name.
Are you trying a local connection (e.g. "sqlplus u/p") or a network connection (e.g. "sqlplus u/p#pnews10s.world")? Are they both giving you the same error?
The TNSPING by definition is using a network connection. I see some references that indicate you can get the 12612 error when using a local connection. So that is a possible explanation why you are seeing the error from SQLPlus but not TNSPING. If so, try doing a network connection instead.
The local connection not working is probably due to ORACLE_SID not being set correctly as John suggested, but his syntax may not be the right method for whatever shell you are using. Make sure you are using the correct method for the given shell, such as "export ORACLE_SID=name" or "setenv ORACLE_SID name".
I have edited the tnsnames.ora file to change the host to 127.0.0.1 rather
than an external url and am able to successfully tnsping my connection, but am not getting much further.
The last time that happened to me (tnsping works but sqlplus does not, same error message you got), the issue was that someone had copied the tnsnames.ora file from a Windows machine, and left the wrong line feed codes in.
If that is the case, you need to do some dos2unix.
These files are very sensitive to "correct" white-space and tabbing.
Someone should complain to Oracle about that.
Dave Costa has presented you with 2 important question. Are you trying to connect via net8 or locally via extproc? Is the listener on the local machine(127.0.0.1 -- loop back device) setup for extproc connection?
To use the net8 or tcp connection protocol, you need to specify user/pw#tns_alias. To connect locally via extproc you should specify the oracle_sid parameter and then connect via name/pw.
I also notice the tnsalias has the .world domain appended to it, but the sqlnet.ora file does not contain a reference to NAMES.DEFAULT_DOMAIN as being "world".
Also what is the env parameter for TNS_ADMIN? Make sure your tools are looking at the correct tnsnames.ora file. Too many time people modify one tnsnames.ora and the programs/software is looking at another.
Check the tnsnames.ora file, in my case, took me days to find out there were either tab characters in the connection string or other invisible special characters that were causing it to fail.
In my case, the problem was that the DSN and the ServiceName was configured as the same in the odbc.ini file.This should not be a problem, but only after changing the DSN name, I was able to connect to the database through isql.