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I'm sorry, but there is no specific information in the provided knowledge sources that explains the exact cause of a hang during the "Attempting typing and deduping" step for a Google Ads to PostgreSQL sync. However, the knowledge sources do highlight several related issues and general troubleshooting steps for syncs that appear to hang or "loop" similar log messages: * Typing and Deduping Context: This process is responsible for casting data into correct relational columns and ensuring record uniqueness [[Core Concepts](https://docs.airbyte.com/platform/using-airbyte/core-concepts#typing-and-deduping)]. * Infinite Loops/Hangs: Similar "ASYNC QUEUE INFO" and "Flush Worker" log loops (where queue size remains 0) have been reported in open issues for other connectors, such as Jira to BigQuery, where the sync appears to hang indefinitely [[Github Issue 58082](https://github.com/airbytehq/airbyte/issues/58082)]. * Large Data/Memory Issues: In cases involving PostgreSQL destinations, syncs have been known to get stuck when handling large volumes of data. One investigation found that complex SQL queries generated for internal loading (specifically involving

_airbyte_meta

) could lead to seemingly infinite processes in the destination database [[Github Issue 51580](https://github.com/airbytehq/airbyte/issues/51580)]. * Potential Workarounds: * Check Database Processes: Look at your PostgreSQL instance's running processes to see if an expensive SQL command (like an

INSERT INTO ... SELECT ...

) is currently running or locked [[Github Issue 51580](https://github.com/airbytehq/airbyte/issues/51580)]. * Memory Monitoring: Verify if the Airbyte containers are hitting memory limits during this phase, as memory pressure can cause syncs to stall [[Forum Post 2703](https://discuss.airbyte.io/t/2703)]. * Isolation: Try syncing a single, smaller table to see if the issue persists, which helps determine if the problem is volume-dependent [[Forum Post 2703](https://discuss.airbyte.io/t/2703)]. The knowledge sources do not explicitly mention a fix for this log loop during typing and deduping for the Google Ads connector. If the sync remains stuck, you may need to check for locks on your destination PostgreSQL tables.