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SSIS‑948 – Understanding, Diagnosing, and Resolving the Error Author: ChatGPT (2024‑06) – All content original
1. Overview SQL Server Integration Services (SSIS) is Microsoft’s ETL (Extract‑Transform‑Load) platform for data movement and workflow automation. While SSIS is robust, it occasionally surfaces cryptic error codes that can halt a package execution. One of the more frequently reported messages is SSIS‑948 .
SSIS‑948 – “The data flow component “{ComponentName}” failed to acquire a connection.”
This article explains what the error means, why it occurs, how to troubleshoot it, and best‑practice steps to prevent it from resurfacing. ssis-948
2. What Exactly Is SSIS‑948? | Element | Description | |---------|-------------| | Error ID | 948 (internal SSIS error code) | | Message Text | “The data flow component ‘{ComponentName}’ failed to acquire a connection.” | | Subsystem | Data Flow task – Connection Manager usage | | Severity | Fatal (causes the Data Flow to stop) | | Typical Location | Occurs during Validate , Pre‑Execute , or Post‑Execute phases of a Data Flow component that requires a connection (e.g., OLE DB Source, OLE DB Destination, ADO.NET Destination, Excel Source, etc.). | | Impact | The package fails; downstream components are not executed. | In short, the component cannot obtain a valid, open connection to the external resource it needs to read from or write to.
3. Common Scenarios That Trigger SSIS‑948 | Scenario | Why It Happens | |----------|----------------| | Incorrect Connection String | Typo, missing server name, wrong database, or wrong provider. | | Credential Issues | The connection uses Windows Authentication and the executing account does not have rights, or the SQL login/password is expired/disabled. | | Package Configuration Overwrites | A configuration file/environment variable replaces a working connection string with an invalid one at runtime. | | Connection Manager Set to “DelayValidation” = False | Validation occurs before runtime variables are populated, causing a temporary invalid state. | | 64‑bit vs 32‑bit Provider Mismatch | The package runs in 64‑bit mode but the required provider (e.g., Jet OLEDB for Excel) is only 32‑bit. | | Network Issues | DNS resolution failure, firewall blocks, VPN disconnects, or the remote server is down. | | Concurrent Connections Limit Exceeded | Some data sources (e.g., Oracle, SAP) limit the number of simultaneous connections; SSIS may exceed the limit during a bulk load. | | Package Deployed to SSISDB with “Project Parameters” Overridden Incorrectly | Parameters that feed connection strings are mis‑typed or left blank in the catalog. | | Run‑time User Context Change | Using Execute Process Task or Impersonation that switches to a user without the needed privileges. |
4. Step‑by‑Step Diagnosis Below is a practical, ordered checklist you can follow when you encounter SSIS‑948. 4.1 Capture the Full Error Context One of the more frequently reported messages is SSIS‑948
Enable Detailed Logging
In the SSIS package, add a SSIS log provider (e.g., SSIS log provider for Text files ). Log at OnError and OnTaskFailed events.
Read the Error Message
Note the exact component name ( {ComponentName} ) and the inner exception (if any).
Check the Execution Mode
