Ssis-948

The Case of SSIS‑948: A Data‑Pipeline Mystery

4.1 Capture the Full Error Context

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
- Is the package running in Debug (Visual Studio) or Production (SQL Agent / SSIS Catalog)?

6.2 SSISDB Dashboard (Azure)

A new “Adaptive Buffers” tile appears on the Integration Runtime > Performance page, showing: ssis-948

Real‑time buffer size trend (line chart)
CPU utilisation vs. TargetCPUUtilisation
Memory headroom (free vs. allocated)

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. | The Case of SSIS‑948: A Data‑Pipeline Mystery

5.2 Step‑by‑Step Walk‑through

Open the SSIS project in Visual Studio (or Azure Data Factory → SSIS integration runtime).
Select the Data Flow Task you wish to optimise.
In the Properties window, locate the Adaptive Buffer group.
Set AdaptiveBufferMode to Auto (or keep the default).
(Optional) Adjust MinBufferSizeKB / MaxBufferSizeKB if you have strict memory caps on the host.
Deploy the package to the SSIS Catalog (or Azure‑IR).
Monitor the new runtime metrics (see Section 6) to verify that buffers are being resized as expected.