{"record":{"id":"b469a1aeb8fefe66","repo":"apache/seatunnel","slug":"failed-to-flush-data-in-preparecommit","errorCode":null,"errorMessage":"Failed to flush data in prepareCommit","messagePattern":"Failed to flush data in prepareCommit","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"seatunnel-connectors-v2/connector-http/connector-http-airtable/src/main/java/org/apache/seatunnel/connectors/seatunnel/airtable/sink/AirtableSinkWriter.java","lineNumber":230,"sourceCode":"        // half of MAX can be less than the previous retry's wait, which would let\n        // a later retry sleep for less than an earlier one. It also keeps the\n        // wait at or above rateLimitBackoffMs for free, since the last uncapped\n        // wait is never smaller than the configured backoff.\n        long floor = waitMillis / 2;\n        for (long scheduled = rateLimitBackoffMs; scheduled < MAX_BACKOFF_MILLIS; scheduled <<= 1) {\n            if (scheduled > floor) {\n                floor = scheduled;\n            }\n        }\n        return waitMillis - ThreadLocalRandom.current().nextLong(waitMillis - floor + 1);\n    }\n\n    @Override\n    public Optional<Void> prepareCommit() {\n        try {\n            flush();\n        } catch (IOException e) {\n            throw new RuntimeException(\"Failed to flush data in prepareCommit\", e);\n        }\n        return Optional.empty();\n    }\n\n    @Override\n    public void close() throws IOException {\n        flush();\n        if (Objects.nonNull(httpClient)) {\n            httpClient.close();\n        }\n    }\n}\n","sourceCodeStart":212,"sourceCodeEnd":243,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-http/connector-http-airtable/src/main/java/org/apache/seatunnel/connectors/seatunnel/airtable/sink/AirtableSinkWriter.java#L212-L243","documentation":"AirtableSinkWriter.prepareCommit flushes buffered records as part of the checkpoint protocol; if flush() throws an IOException it is rethrown as a RuntimeException 'Failed to flush data in prepareCommit'. This fails the checkpoint (and ultimately the task), so no data is acknowledged to Airtable twice without retry semantics.","triggerScenarios":"prepareCommit() is invoked at checkpoint/commit time and the pending flush fails for any reason: Airtable error status (see 1411), network failure (see 1412), or rate-limit retries exhausting.","commonSituations":"Checkpoint triggered while Airtable is rate-limiting heavily or during a network blip; large buffered batch exceeding Airtable request limits.","solutions":["Look at the cause of the RuntimeException to see the underlying flush failure (status code vs network).","Reduce batch size / increase request interval so flushes complete within commit timeouts.","Ensure the Airtable token has adequate rate limits and quota.","Restart the job from the last successful checkpoint after fixing the root cause; sink is exactly-once via checkpoint recovery."],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"try { writer.prepareCommit(); } catch (RuntimeException e) { Throwable root = ExceptionUtils.getRootCause(e); log.error(\"Airtable flush failed at commit: {}\", root.getMessage(), root); throw e; }","preventionTips":["Tune request_interval_ms so batches drain within checkpoint timeouts","Keep batches below Airtable's 10-record request limit","Monitor Airtable 429/5xx rates","Enable checkpointing with a sane timeout"],"tags":["airtable","checkpoint","flush"],"backgroundTag":"api-request-failed","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}