ImportDocuments2 fails - "documentai-core-frontend has no quota (partition=hdd)"

I’m unable to import documents into my Custom Extractor processor. Every import attempt fails with “Failed to import all documents”.

The actual error from the API response is:

“Poisoned file handle: Group documentai-core-frontend has no quota (partition=hdd)”

**Project details:**

  • Project ID: (PII Removed by Staff)
  • Project Number: (PII Removed by Staff)
  • Processor ID: 7510d915fca781
  • Processor Name: ce-facturas-proveedor
  • Region: us
  • Default Version: pretrained-foundation-model-v1.5-pro-2025-06-20
  • Storage: Google-managed
  • Operation ID: 4270883296982235945
  • Error Timestamp: 2026-03-31T21:23:23.673952Z

**What I verified:**

  • Billing is active (paid account)
  • Document AI API is enabled (137 requests today)
  • Processor previously imported 37 documents successfully
  • Tested multiple PDFs (all under 5 MB) - all fail
  • Tested with and without auto-labeling - same error

This started recently. The processor was working correctly before.