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<@U04S8PLJWMT> What does this mean when Airbyte re...
# ask-ai
a
@kapa.ai What does this mean when Airbyte repeats outputting the same log message? Also, what can we do?
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2025-07-22 11:21:23 destination INFO pool-3-thread-1 i.a.c.i.d.a.b.BufferManager(printQueueInfo):94 [ASYNC QUEUE INFO] Global: max: 307.2 MB, allocated: 10 MB (10.0 MB), %% used: 0.03255208335354433 | State Manager memory usage: Allocated: 10 MB, Used: 0 bytes, percentage Used 0.0
2025-07-22 11:21:23 destination INFO pool-6-thread-1 i.a.c.i.d.a.FlushWorkers(printWorkerInfo):129 [ASYNC WORKER INFO] Pool queue size: 0, Active threads: 0
2025-07-22 11:22:23 destination INFO pool-3-thread-1 i.a.c.i.d.a.b.BufferManager(printQueueInfo):94 [ASYNC QUEUE INFO] Global: max: 307.2 MB, allocated: 10 MB (10.0 MB), %% used: 0.03255208335354433 | State Manager memory usage: Allocated: 10 MB, Used: 0 bytes, percentage Used 0.0
2025-07-22 11:22:23 destination INFO pool-6-thread-1 i.a.c.i.d.a.FlushWorkers(printWorkerInfo):129 [ASYNC WORKER INFO] Pool queue size: 0, Active threads: 0
...
k
When Airbyte repeatedly outputs the same log messages like:
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[ASYNC QUEUE INFO] Global: max: 307.2 MB, allocated: 10 MB (10.0 MB), %% used: 0.03255208335354433 | State Manager memory usage: Allocated: 10 MB, Used: 0 bytes, percentage Used 0.0 [ASYNC WORKER INFO] Pool queue size: 0, Active threads: 0
it typically means that the system is in an idle or waiting state. Specifically: - The buffer/queue is not receiving new records (
num records: 0, num bytes: 0 bytes
in similar logs). - No active worker threads are processing data. - The system is repeatedly checking the queue status, finding nothing to do, and logging the same state at regular intervals. This pattern is seen in several Airbyte issues where syncs appear to "hang" or do nothing, often due to no new data being available, a stalled upstream source, or a downstream blockage. For example, in [this issue](https://github.com/airbytehq/airbyte/issues/58082), similar logs are output repeatedly when the queue is empty and no work is being processed. ### What can you do? 1. Check Source and Destination Connectivity: Ensure that the source is producing data and the destination is available to receive it. 2. Review Sync Configuration: Make sure the sync is set up correctly and is expected to process data at this time. 3. Restart the Sync: Sometimes, restarting the sync or the Airbyte worker can resolve a stuck state. 4. Check for Known Issues: This behavior can be related to bugs or memory management issues, as seen in [other reports](https://github.com/airbytehq/airbyte/issues/16652). Upgrading Airbyte or relevant connectors may help. 5. Monitor Resource Usage: If memory usage is high or negative (as in some bug reports), it may indicate a deeper issue with buffer management or garbage collection. If the logs persist and no data is being processed, it may be necessary to investigate further or reach out to Airbyte support with detailed logs and configuration information. If you need more specific troubleshooting steps, please provide additional context about your sync setup and connector versions. The knowledge sources do not provide a single root cause, but repeated idle logs generally indicate no data is flowing through the pipeline at that moment, or a process is stuck waiting for new data or a trigger to proceed.
a
@kapa.ai Connectivity is fine for both source and destination. Sync configuration works fine because it only happens to a specific stream which was synced successfully before. I tried to restart the sync several times but got the same situation in the end. Please propose something useful.
k
A message from kapa.ai
Based on the knowledge sources, when Airbyte repeatedly outputs the same log messages indicating an idle buffer and no active worker threads, and this only affects a specific stream that previously worked, it suggests the sync process is stuck in a loop where no new records are being processed or flushed. This pattern is documented in the referenced GitHub issue, where the queue remains empty and flush workers repeatedly pick up "work" but process zero records each time. From the logs in the issue, this can happen even after successful previous syncs, and persists across restarts. The logs show the buffer manager and flush workers reporting zero records and zero bytes, with the system continuously triggering flushes based on time, but with nothing to process:
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Batch contains: 0 records, 0 bytes bytes.
This behavior is not caused by connectivity or configuration issues, but appears to be a bug or an internal state issue within Airbyte's async queue or state management for that stream. The knowledge sources do not provide a definitive fix, but the following steps are suggested or implied: - Check for Stuck State or Corrupted State: The issue may be related to a corrupted or inconsistent state for the specific stream. In the referenced issue, the problem persisted until the state was reset or the stream was reconfigured. - Reset the Stream State: Try resetting the state for the affected stream. This can sometimes clear out any stuck or inconsistent state that is preventing new records from being processed. - Recreate the Connection or Stream: If resetting the state does not help, try deleting and recreating the connection or the specific stream in Airbyte. - Check for Known Bugs: This issue is recognized in the Airbyte community and may be related to a bug in the async queue or state management logic. Monitor the [GitHub issue](https://github.com/airbytehq/airbyte/issues/58082) for updates or workarounds from the Airbyte team. If these steps do not resolve the issue, you may need to provide detailed logs and configuration to the Airbyte team for further investigation, as the knowledge sources do not contain a confirmed root cause or universal solution for this specific stuck state. [See the related discussion and logs here.](https://github.com/airbytehq/airbyte/issues/58082)
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