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Database Concepts, 12c Release 1 (12.1)

Application and Networking Architecture

The Oracle Net Listener(the listener) is a server-side process that listens for incoming client connection requests and … , the instance contacts a listener and establishes a communication pathway to this instance. Service … registration enables the listener to determine whether a database service and its service handlers … connection point to a database.

Database Concepts, 12c Release 1 (12.1)

Glossary

listenerA process that listens for incoming client connection requests and manages network traffic to the database.

Grid Infrastructure Installation Guide for Linux, 12c Release 1 (12.1)

Troubleshooting the Oracle Grid Infrastructure Installation Process

A.10 SCAN VIP and SCAN Listener IssuesIf the final check of your installation reports errors related to the SCAN VIP addresses or listeners, then check the following items to make sure your network is configured correctly: Check the file /etc/resolv.conf - verify the contents are the same on each node Verify that there is a DNS entry for the SCAN, and that it resolves to three valid IP addresses. Use the command nslookup scan-name. this

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-10 srvctl add listener Options4.5.1.3 srvctl add listener Adds a listener to the Oracle Restart configuration. 4.5.1.3.1 Syntax … and Options Use the srvctl add listener command with the following syntax: srvctl add listener … [-listener listener_name] [-endpoints endpoints] [-skip] [-oraclehome oracle_home] Table 4-10 srvctl add

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-33 srvctl modify listener Options4.5.7.3 srvctl modify listener Modifies the Oracle Restart configuration for the specified listener … or all listeners. 4.5.7.3.1 Syntax and Options Use the srvctl modify listener command with the … following syntax: srvctl modify listener [-listener listener_name] [-endpoints endpoints] [-oraclehome

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-49 srvctl start listener Options4.5.10.5 srvctl start listener Starts the specified listener or all listeners. 4.5.10.5.1 Syntax … and Options Use the srvctl start listener command with the following syntax: srvctl start listener … [-listener listener_name] Table 4-49 srvctl start listener Options Option Description

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-15 srvctl config listener OptionsDatabase is enabled 4.5.2.3 srvctl config listener Displays the Oracle Restart configuration … information for all Oracle Restart-managed listeners or for the specified listener. 4.5.2.3.1 Syntax and … Options Use the srvctl config listener command with the following syntax: srvctl config listener … [-listener

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-19 srvctl disable listener Optionssrvctl disable listener Disables the specified listener or all listeners. 4.5.3.4.1 Syntax and … Options Use the srvctl disable listener command with the following syntax: srvctl disable listener … [-listener listener_name] Table 4-19 srvctl disable listener Options Option Description

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Delete a listener with NETCA YesNo Delete a listener with NETCA Yes Drop an Oracle ASM disk group (any method) Yes Delete a

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-44 srvctl setenv listener Optionssrvctl setenv listener Sets the values of environment variables in the Oracle Restart configuration … for a listener. Before starting the listener, Oracle Restart sets environment variables to the … values stored in the configuration. 4.5.9.3.1 Syntax and Options Use the srvctl setenv listener command … with the

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-56 srvctl status listener Options4.5.11.5 srvctl status listener Displays the running status of the specified listener or of all … Oracle Restart-managed listeners. 4.5.11.5.1 Syntax and Options Use the srvctl status listener command … with the following syntax: srvctl status listener [-listener listener_name] [-verbose] Table 4-56

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-25 srvctl enable listener Optionssrvctl enable listener Enables the specified listener or all listeners. 4.5.5.4.1 Syntax and Options … Use the srvctl enable listener command with the following syntax: srvctl enable listener [-listener … listener_name] Table 4-25 srvctl enable listener Options Option Description -listener

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-30 srvctl getenv listener Optionsdatabase with DB_UNIQUE_NAME dbcrm: srvctl getenv database -db dbcrm 4.5.6.3 srvctl getenv listener … Displays the configured environment variables for the specified listener. 4.5.6.3.1 Syntax and Options … Use the srvctl getenv listener command with the following syntax: srvctl getenv listener [-listener

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-39 srvctl remove listener Optionsopen on this disk group. srvctl remove diskgroup -diskgroup DATA 4.5.8.4 srvctl remove listener … Removes the specified listener or all listeners. 4.5.8.4.1 Syntax and Options Use the srvctl remove … listener command with the following syntax: srvctl remove listener [-listener listener_name | -all

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-63 srvctl stop listener Options4.5.12.5 srvctl stop listener Stops the designated listener or all Oracle Restart-managed listeners … . Stopping a listener does not cause databases that are registered with the listener to be stopped … . 4.5.12.5.1 Syntax and Options Use the srvctl stop listener command with the following syntax: srvctl

Database Administrator's Guide, 12c Release 1 (12.1)

Configuring Automatic Restart of an Oracle Database

Table 4-68 srvctl unsetenv listener Optionsdatabase -db dbcrm -envs AIXTHREAD_SCOPE 4.5.13.3 srvctl unsetenv listener Removes the specified … environment variables from the Oracle Restart configuration for the specified listener or all listeners … . 4.5.13.3.1 Syntax and Options Use the srvctl unsetenv listener command with the following syntax … : srvctl unsetenv listener

Database Installation Guide for Linux, 12c Release 1 (12.1)

Glossary

listenera database server, a listener receives the actual request. If the client information matches the … listener information, then the listener grants a connection to the database server.

Oracle C++ Call Interface Programmer's Guide, 12c Release 1 (12.1)

Listener Class

Listener()Listener class constructor. Syntax Description Listener( const Connection* conn); Creates a … Listener object. Listener( const Connection* conn vector &aglist, int waitTime=0); Creates a Listener … ; default: no waiting. Parameter Description conn The connection of the new Listener object.

Oracle C++ Call Interface Programmer's Guide, 12c Release 1 (12.1)

Oracle Streams Advanced Queuing

ListenerA Listener listens for Message s for registered Agent s at specified queues. See Also: Listener

Database Concepts, 12c Release 1 (12.1)

Application and Networking Architecture

The listener registration process LREG registers information about the database instance and dispatcher…… When a client connects to a listener, it requests a connection to a service. When a database … instance starts, it registers itself with a listener as providing one or more services by name. Thus, the … listener acts as a mediator between the client and instances and routes the connection request to the … right place.