Ssis-776

If you were to write a report on this issue:

# 2️⃣ Run a quick “buffer sanity” test - task: PowerShell@2 name: ValidateBuffers inputs: targetType: 'inline' script: | # Load the .ispac and inspect buffer settings $proj = [System.IO.Path]::Combine($(Build.SourcesDirectory), '$(SSISProject)') $xml = [xml](Get-Content $proj) $buf = $xml.ProjectPackage.Package.DataFlowTask.DefaultBufferSize Write-Host "##vso[task.setvariable variable=DefaultBufferSize]$buf" if ($buf -lt 104857600) Write-Error "DefaultBufferSize < 100 MB – SSIS-776 risk" SSIS-776

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Using SSIS script task to create a text file - Experts Exchange | ✔ | | Same package works after

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| Symptom | Frequency | Typical Log Entry | Likely SSIS‑776? | |---------|-----------|-------------------|------------------| | after processing ~80 % of rows | Intermittent (once per run) | Error: 0xC0010009 – The XML source is not valid. | ✔ | | Memory usage spikes to > 3 GB (as shown by Performance Monitor) before the crash | Consistent | Process ID 1234 (DtsDebugHost.exe) uses 3,456 MB. | ✔ | | Package runs fine on small XML (< 50 MB) but fails on larger ones | Predictable | No error for 30 MB test file. | ✔ | | Same package works after disabling XSD validation | Often | XML Source: Validation disabled – success. | ✔ (validation triggers the bug) | | Error appears only after a recent cumulative update | Possible | After CU6 the issue appears; CU7 works. | ❓ (could be regression) | | Package works on a different server (different OS/patch level) | Occasionally | Server B (SQL 2019 SP3) succeeds. | ✔ (environment matters) |