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The FND_APPLICATION_SERVERS table in Oracle E-Business Suite (EBS) 12.1.1 and 12.2.2 is a critical repository table that stores configuration and runtime information about application servers within the EBS environment. This table is part of the Oracle Applications Foundation (FND) schema and plays a key role in managing server instances, load balancing, and failover mechanisms in a multi-node deployment. Below is a detailed analysis of its structure, purpose, and significance in Oracle EBS.

Purpose and Functionality

The FND_APPLICATION_SERVERS table maintains metadata about application servers (also known as concurrent processing servers or middle-tier nodes) in an Oracle EBS environment. It tracks server-specific attributes such as hostnames, port numbers, status, and configuration details required for communication between the database tier and the application tier. This table is essential for:
  • Load Balancing: Enables the distribution of concurrent requests across multiple application servers to optimize performance.
  • Failover Management: Helps in rerouting requests to active servers if a node fails.
  • Server Monitoring: Provides visibility into server availability and health.
  • Configuration Management: Stores server-specific settings used by Oracle EBS components.

Key Columns and Their Significance

The table includes several important columns, each serving a specific purpose:
  • SERVER_ID: A unique identifier for each application server.
  • SERVER_NAME: The hostname or logical name of the server.
  • NODE_NAME: The physical node name in a clustered environment.
  • SERVER_PORT: The port number used for communication (e.g., for concurrent processing).
  • STATUS: Indicates whether the server is active, inactive, or in maintenance mode.
  • SERVER_TYPE: Specifies the type of server (e.g., "CP" for Concurrent Processing, "Web" for HTTP server).
  • LAST_UPDATE_DATE: Timestamp of the last configuration update.
  • ENABLED_FLAG: A flag indicating whether the server is enabled for processing requests.

Usage in Oracle EBS 12.1.1 and 12.2.2

In Oracle EBS 12.1.1 and 12.2.2, the FND_APPLICATION_SERVERS table is referenced by various system processes, including:
  • Concurrent Managers: To determine which servers are available for processing concurrent requests.
  • Oracle Application Object Library (FND): For server registration and dynamic load balancing.
  • Oracle Workflow: To route notifications and background engine jobs.

Administration and Maintenance

Administrators interact with this table indirectly through Oracle EBS utilities such as:
  • AutoConfig (ADCONFIG): Updates server configurations during environment changes.
  • Oracle Applications Manager (OAM): Provides a GUI to monitor and manage servers.
  • SQL Scripts: Used for troubleshooting or manual updates (though caution is advised).

Conclusion

The FND_APPLICATION_SERVERS table is a foundational component in Oracle EBS 12.1.1 and 12.2.2, ensuring efficient server management, scalability, and high availability. Proper configuration and monitoring of this table are crucial for maintaining a stable and performant EBS environment. Administrators should avoid direct modifications to this table unless guided by Oracle Support, as improper changes can disrupt system operations.