| Scenario | Explanation | |----------|-------------| | + SQL Server Agent job | Agent runs under a service account (e.g., NT SERVICE\SQLSERVERAGENT or a domain account). The package inherits that account unless you explicitly specify a proxy or connection string with credentials. | | SQL Authentication with wrong password or disabled login | The login may exist but be disabled, or the password may have changed. | | Database is in SINGLE_USER mode | Only one login (often sa ) can connect. Any other login gets error 927. | | Contained Database with no login mapped | The user tries to connect via a non‑contained login that isn’t mapped to the contained user. | | Cross‑database ownership chaining disabled | If the package accesses multiple databases and the chain is broken, SQL Server may block the request. | | Impersonation (EXECUTE AS) in stored procedures | The context switches to a user without rights on the target DB. |
When an application is bound or compiled, it relies on specific attachment facilities (such as the DB2 Call Attachment Facility—CAF, or RRSAF). A SQLCODE -927 frequently triggers when a program bound with one specific database call attach module attempts to execute another program bound to a completely different or conflicting call attach module . B. Unvalidated Connection Context
Create a specific proxy account for SSIS jobs that requires access to file systems, rather than running as a sysadmin. SSIS-927
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What Are SQL Server Integration Services? - IT Glossary - SolarWinds
– confirmed the job was using the Agent service account. | | Database is in SINGLE_USER mode |
[Data Sources] [SSIS Engine] [Target Destination] +----------------+ +-------------------+ +--------------------+ | SQL Databases | ----> | Extract (ETL) | ----> | | | Flat Files | ----> | Transform Data | ----> | Data Warehouse | | Cloud Storage | ----> | Load Profiles | ----> | | +----------------+ +-------------------+ +--------------------+ Key Architecture Components
SSIS‑927 was commissioned to meet these goals. The following sections detail how the project team translated them into a concrete SSIS architecture and the key engineering decisions that made the solution sustainable.
The adoption of SSIS-927 across enterprise hardware is driven by its impressive technical metrics. Compared to legacy serial interfaces, it introduces several major architectural upgrades: 1. Bandwidth and Data Rates