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SparkSession.getActiveSession() is Suddenly Broken in Python Multi-threading

16m ago

Hello everyone,Around 3PM EST yesterday (2026-11-12), dozens of Lakeflow jobs started failing on both classic and serverless compute with distinct symptoms1. On classic compute (DBR 15.4), reading a file from S3 would result in a PATH NOT FOUND error...

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SparkSession.getActiveSession() is Suddenly Broken in Python Multi-threading