{"record":{"id":"58a682c4e10e028f","repo":"apache/seatunnel","slug":"graph-operation-failed-on-attempt-error","errorCode":null,"errorMessage":"Graph operation failed on attempt {}/{}. Error: {}","messagePattern":"Graph operation failed on attempt (.+?)/(.+?)\\. Error: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"seatunnel-connectors-v2/connector-hugegraph/src/main/java/org/apache/seatunnel/connectors/seatunnel/hugegraph/client/HugeGraphClient.java","lineNumber":247,"sourceCode":"            try {\n                ensureClientInitialized();\n                operation.execute(this.client.graph());\n                return;\n            } catch (ServerException | ClientException e) {\n                if (!isRetryable(e) || !idempotent) {\n                    LOG.error(\n                            \"Server rejected the request ({}): {}\",\n                            idempotent ? \"non-retryable\" : \"non-idempotent, not retrying\",\n                            e.getMessage());\n                    throw new HugeGraphConnectorException(\n                            HugeGraphConnectorErrorCode.GRAPH_OPERATION_FAILED,\n                            \"Server rejected the request\"\n                                    + (idempotent ? \" (non-retryable)\" : \" (non-idempotent)\")\n                                    + \": \"\n                                    + e.getMessage(),\n                            e);\n                }\n                LOG.warn(\n                        \"Graph operation failed on attempt {}/{}. Error: {}\",\n                        attempt,\n                        totalAttempts,\n                        e.getMessage());\n                reconnect();\n\n                if (attempt == totalAttempts) {\n                    LOG.error(\"Max retries ({}) reached. Failing task.\", this.maxRetries);\n                    throw new HugeGraphConnectorException(\n                            HugeGraphConnectorErrorCode.GRAPH_OPERATION_FAILED,\n                            \"Failed to execute graph operation after \"\n                                    + totalAttempts\n                                    + \" attempt(s). Last error: \"\n                                    + e.getMessage(),\n                            e);\n                }\n\n                sleepBeforeRetry(attempt);","sourceCodeStart":229,"sourceCodeEnd":265,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-hugegraph/src/main/java/org/apache/seatunnel/connectors/seatunnel/hugegraph/client/HugeGraphClient.java#L229-L265","documentation":"WARN emitted by HugeGraphClient.executeGraphOperation when a graph write attempt fails on a retryable error and will be retried (attempt N of totalAttempts). After logging, reconnect() discards the client and sleep/retry continues. If all attempts are exhausted, a HugeGraphConnectorException is thrown with BUILD_CLIENT_FAILED or a non-retryable message instead.","triggerScenarios":"executeIdempotentWrite -> executeGraphOperation throws a retryable connection/transport exception (timeout, connection reset, 5xx) while writing vertices/edges; the operation is retried up to totalAttempts times.","commonSituations":"HugeGraph server overloaded or GC-pausing during bulk loads, transient network drops between worker and server, server restarts mid-write, or per-request timeouts set too low for large batches.","solutions":["Wait — the operation retries automatically; check whether subsequent attempts succeed","If attempts exhaust, check HugeGraph server health and logs for the failing period","Reduce batch size or increase request timeout to lower per-request failure probability","Increase retry attempt count in connector configuration for flaky networks"],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// Pre-flight: verify server can accept writes within timeout\ncurl -sf -X POST http://hugegraph:8080/graphs/<graph>/schema/propertykeys -H 'Content-Type: application/json' -d '{\"name\":\"probe\",\"data_type\":\"TEXT\"}'","typeGuard":null,"tryCatchPattern":"try {\n    executeIdempotentWrite(op);\n} catch (HugeGraphConnectorException e) {\n    if (e.getErrorCode() == HugeGraphConnectorErrorCode.BUILD_CLIENT_FAILED) {\n        // retries exhausted: alert and requeue the batch\n    }\n    throw e;\n}","preventionTips":["Size batches so each request completes well under the request timeout","Load-test HugeGraph under your target write throughput","Configure generous retry attempts for known-flaky networks","Alert on repeated 'attempt x/y' warnings — they precede hard failures"],"tags":["hugegraph","retry","write","network"],"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"}