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Questions tagged [listener]

A Network Listener waits for and responds to incoming network requests. Use this tag for questions about e.g. the Oracle Net Listener or SQL Server Availability Group Listener. Be sure to also tag the product name.

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votes
2answers
37k views

ORA-12505: TNS:listener does not currently know of SID given in connect descriptor

Couple of days back, I execute shutdown on my DB but it took very long time so I shutdown my m/c. After restarting my machine, I get this exception when I try to connect to my database using TOAD. I ...
0
votes
0answers
20 views

SELECT LISTEN in Postgres [on hold]

How might I SELECT my NOTIFY I sent to the database in an IDE like PG-Admin? I am trying to figure out hour to SELECT my NOTIFY statement so I can use it in ADO recordsets using VBA in MS-Access. I ...
0
votes
0answers
25 views

Availability Group Listener Loses Connectivity on Failover

I have 2 SQL server 2016 standard Servers. Production (SRV1). For reporting (SRV2) Both servers are nodes in WSFC. SRV1 replicates the production database (DB1) to SRV2 with the distributor ...
0
votes
1answer
38 views

Cannot connect database as sys as sysdba using sqlplus

I am new to oracle server 18c (currently taking online course). My problem is sql*plus where I tried to use sqlplus then sys as sysdba (it did not work) and the error appeared below. However, if I ...
2
votes
2answers
104 views

Availability groups multiple instance, multiple listeners

In my work environment, I have two database machines: DB01 DB02 Each database machine has three SQL Server instances: MSSQLSERVER FBG Central I've managed to set up availability groups with SQL ...
2
votes
2answers
45 views

what happens to user connections when an AG fails over?

I'm not sure quite how to word this, but I am looking for anything a DBA can do (things outside of changing code in the application) to reduce the impact to users when an AG fails over. We have a 2 ...
0
votes
1answer
185 views

connecting to an oracle sql database from sql developer on the same computer. When the computer is a domain computer

Hi I am trying to do DBA course that requires that I use Oracle database. I am using my corporate pc to do it. I set up the loopback adapter to enable localhost communication and setup the hosts ...
1
vote
1answer
744 views

Turn off listener logging in oracle 12c release 2

I am trying to turn off listener logging in oracle 12c R2 (SAP on oracle), but I am getting a TNS-12508 error. I have verified that the listener.ora is owned by the oracle user and I am performing the ...
1
vote
1answer
171 views

SQL Server 2014 AG Listener

I have built a two node SQL Server 2014 Always On cluster on the same subnet. I need to create two availability groups/listeners in the same instance for two sets of databases. Do I need two separate ...
4
votes
1answer
2k views

Oracle Database Server TNS Listener Remote Registration Vulnerability (CVE-2012-1675)

Some of our Internal DBs Oracle installed in Linux and Windows servers have been highlighted with the issue Oracle TNS Listener Remote Poisoning (CVE-2012-1675). This security alert addresses the ...
2
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4answers
44k views

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor on linux

I have configured oracle 12c on Rhel 7. When I try to connect database using following command it gets connected with no issues: sqlplus system/Forest123@orcl I'm facing problem when I try to put ...
0
votes
1answer
414 views

Unable to connect to Listener after rebuild

I dropped an AG with DROP AVAILABILITY GROUP [MyDb] it had a listener. I left the listener open in the object Explorer of SSMS 17.3. While the AG and Listener were down. I hit refresh on the ...
0
votes
2answers
8k views

Net Configuration Assistant doesn't open, created Listener in Net Manager but it isn't recognized when creating database Win 7

I have installed Oracle 11g on my Windows 7 64-bit system. The Net Configuration Assistant does not open for me to create a listener. I was able to add a listener through the Net Manger and it says it ...
1
vote
2answers
3k views

What is an example of an extproc.ora file?

What do the contents of extproc file look like? I'm aware that my extproc.ora file is missing, and I'd like to create one in it's absence. The instructions here tell me to: Configure the Oracle ...
0
votes
0answers
109 views

Install Oracle 12c on Oracle Linux 6.7 port in use

I have attempted to install Oracle 12.1.0.2.0 on Oracle Linux 6.7 multiple times without success. I have installed the database software only with the configuration assistant and am attempting to ...
2
votes
1answer
1k views

When trying to configure data guard broker I'm getting Error: ORA - 12154 : TNS: could not resolve the connect identifier specified

I'm trying to setup data guard broker in my production instance. I have duplicated the primary database to standby database successfully. I've added primary database to data broker configuration and ...
2
votes
1answer
631 views

Listener protocol error - Oracle [closed]

Okay first things first, this is probably a common issue which gets resolved going through all those questions and googling it but still I face this issue: LSNRCTL> service Connecting to (ADDRESS=(...
1
vote
1answer
883 views

Oracle Rac With Scan Error

I have installed Oracle RAC with ASM on Oracle Linux 5.8. My database version is 11.2.0.1. I have 2 node in my plan and all of them are active. I set scan in my DNS server but I can not connect to ...
0
votes
2answers
32 views

ASM - How the asm search the disks and where is this parameter from?

I'm a begginer in Oracle ASM and when I will create a diskgroup the ASM shows me this parameter: Where is this parameter from? I don't remember set any parameter with this name. I know that usually ...
0
votes
1answer
42 views

Oracle - Why create several service_name in service_names parameter?

SERVICE_NAMES specifies one or more names by which clients can connect to the instance. The instance registers its service names with the listener. When a client requests a service, the listener ...
1
vote
1answer
76 views

Read Scale Availability Groups and Listener

Is it possible to use a listener with a read scale availability group? I have read on some sites you cannot use one but in others that you can. If so, what IP address do you use for it? I have ...
2
votes
1answer
109 views

CNAME alias for AlwaysOn Listener

We are currently experiencing an issue with SQL Server migration. There is a legacy product and we don't want to change connection strings due to various reasons. Thus, we would like to keep existing ...
1
vote
0answers
210 views

Oracle 18 on Windows with long hostnames doesn't talk to the local listener?

Note: Initially this was about installing Oracle 18c XE on a Windows machine with a long (> 15 chars) hostname. During our further tests we then noticed that Oracle 18c XE does not work properly at ...
1
vote
4answers
2k views

AlwaysON - Force users connection to use Readable Secondary Nodes

I'm implementing SQL Server 2015 Enterprise on my actual client, using Always On Availability Groups. Processes like Reporting, ETL (extraction of data), and read workload are being redirected to the ...
1
vote
0answers
654 views

Oracle listener give “Message 850 not found; No message file for product=network, facility=NL”

I'have just completed oracle 11g database software installation on Linux. I launched netca and configured a listener. As soon as I try to run lsnrctl I get the following error. [oracle@lnx-db ~]$ ...
1
vote
1answer
82 views

Question on Enabling Kerberos Authentication using SetSPN for Availability Listener alternative DNS name

We have Availability Group, and original DNS name that was given to AG Listener, is too long (something like longername-Listener-01.mydomain.com); Its hard for us to change original DNS name of ...
2
votes
0answers
129 views

Connection to availability group listener on non-default port doesn't require port to be specified

I inherited some 2016 SQL Servers with an availability group and listener. The SQL instances are set up to use port 30001, and the AG listener is also set up to use port 30001. When I connect using ...
1
vote
1answer
50 views

SQL 2017 CU10 on Windows Server 2019 - Availability Group Listener fails to obtain IP from DHCP

We have a few instances of SQL 2017 CU10 Standard on several Windows Server 2016 machines, and normally we create Basic Availability Groups with Listeners obtaining IPs from our DHCP (192.168.112.0/22 ...
1
vote
1answer
285 views

Listener IP not changing after failover

We have a multi-subnet AlwaysOn availability group. There are 2 subnets and those are listed on the cluster and also the listener. Whenever I fail over and ping by the listener name it still shows ...
0
votes
1answer
7k views

Listener Status Blocked

I'm deploying a 12C dataguard on oracle. When performing all procedures, start the instance in the standby, as nomount. I noticed that the standby listener is as BLOCKED status, making it impossible ...
0
votes
2answers
14k views

Cannot connect to database remotely (not even locally when using ip address)

I can login using this command: sqlplus test/test@127.0.0.1:1521/local But not this one: (where 192.168.0.240) is my IP sqlplus test/test@192.168.0.240:1521/local I am absolutely sure that my ip ...
1
vote
1answer
387 views

I need help creating an encrypted listener for my 11gR2 database using a wallet and SHA1 encryption

We are using 11.2.0.4. Since Oracle connections are not encrypted by default and access personally identifiable ( PII ) data in our application we are required to go to an encrypted listener. I am ...
0
votes
0answers
210 views

SQL listener connection fluctuates between primary and Secondary

We have SQL Server 2017 + CU11 Always On set up with one primary and a secondary replica. Suddenly we started facing issues where SQL Server AG listener connection started fluctuating between primary ...
0
votes
1answer
179 views

Listener Port 1433 for Always on Availability Group

In our Availability group I have a reporting server where report writers will connect directly and also crystal reports will be used, If the listener port is 1433 and the clients also gets connected ...
1
vote
2answers
121 views

AG listener creation failed SQL Server [closed]

I'm getting the error below while creating an AG listener in SQL Server. Ensure that the network adapters for dependent IP address resources have access to at least one DNS server. Alternatively, ...
0
votes
0answers
162 views

SQL Server error 19456 when adding the listener

I have three replica same subnet both has a Private and public network. I was able to create the cluster and create the availability group . When I try to add the listener I get the below error ...
0
votes
1answer
117 views

Difference between Client Access Name in SQL server Fail over Cluster and Always on availability group

We are migrating from SQL Server Fail over Instance to Always On Availability group. The current network name is ABC\ABCTEST where ABC is the SQL server Virtual Name and ABCTEST is the named instance ...
4
votes
1answer
1k views

SQL Server AG Listener issues in an AWS VPC

I'm experimenting with creating a 2-node SQL Server Availability Group following Guy Glantser's excellent guide at MadeiraData where he describes a configuration with no AD domain or internal DNS. ...
0
votes
1answer
28 views

Don't show local databases in SQL Always-On AG

We're installing a SQL Server Always On AG solution(SQL Server 2016) in a test-enviroment at our organisation. When testing the features we notice that all databases from a node are listed when we ...
9
votes
3answers
1k views

Always On Availability Group, Always redirect user to read only instance

We have an Always On availability group with a primary and a read-enabled secondary. We have a user for the implementation team who uses the database to check the correctness of the data that they are ...
2
votes
1answer
252 views

Reaching SQL Server AlwaysOn HA listener from the Internet

I've successfully created a SQL Server AlwaysOn High Availability Group between two servers and everything seems to be working great internally. Each replica is on a separate physical location, behind ...
4
votes
4answers
70k views

ORA-12541: TNS:no listener

I've been working this issue all day, reading posts here and other locations. I'm just not able to get past this error. I can connect just fine locally on my server (CentOS), but continue to get the ...
2
votes
2answers
46 views

Availability Group Listener - Dedicated Server?

Should an AG Listener be set up on it's own server? If so, does it require it's own SQL Server license?
1
vote
1answer
40 views

SQLServer - Detect who is connecting via an AG listener

We have multiple generations of applications connecting to SQL Server, some of which we know [their connection libraries] do not support using the MultiSubnetFailover=True connection parameter. Fine. ...
-1
votes
1answer
502 views

Listener not working after installing Oracle 11g

I have installed Oracle 11g on a machine which was already running Oracle 12c. Now the listeners configured for 12c are not started. Lsnrctl status shows the listener parameter file of 11g. How to ...
2
votes
2answers
175 views

Sqlcmd: 'KReadOnly': Unknown Option

I am using SQL Server 2014 SP2 with AG, running this command: sqlcmd -S ABC-ISELL -E -d ABP_SFA_BMB -K ReadOnly Where ABC-ISELL is the listener name, I am getting this error: Sqlcmd: 'KReadOnly': ...
1
vote
1answer
412 views

Listener does not connect to the correct instance

I have an instance with Always ON and two replicas, one of primary and one of secondary. I have created another instance and enabled Always On, each group located in different instances has a ...
3
votes
3answers
1k views

Distributed Availability groups & Listeners

I'm currently doing my first setup with Distributed Availability groups. This is currently a POC setup but will normally be implemented soon. I have 4 nodes, 2 nodes located together and 2 other also ...
0
votes
0answers
610 views

Availability group listener is not listening

I've successfully created an availability group with 3 nodes. I've tried to create a listener, separately trying port 1433 and 1435, but the listener is not even trying to listen - there's no entry in ...
2
votes
0answers
270 views

Secondary Replica Read-Only Routing via Linked Server working from one server, but not the other

I have been given the task of setting up a read-only linked server on ServerA to Availability Group listener ListnerX. ListnerX points to ServerY or ServerZ (ServerY is usually the primary). Read-only ...