{"record":{"id":"5f4208cd8cee85d3","repo":"apache/seatunnel","slug":"connect-auth-failed-for","errorCode":null,"errorMessage":"Connect/auth failed for {}","messagePattern":"Connect/auth failed for (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"seatunnel-edge-agent/seatunnel-edge-agent-transport/src/main/java/org/apache/seatunnel/edge/agent/transport/socket/EdgeTransportClient.java","lineNumber":186,"sourceCode":"                return;\n            } catch (EdgeSocketCollectorRejectedException ex) {\n                if (socket != null) {\n                    try {\n                        socket.close();\n                    } catch (IOException closeEx) {\n                        LOG.debug(\"Error closing socket after REJECTED\", closeEx);\n                    }\n                }\n                throw ex;\n            } catch (IOException connectOrAuthEx) {\n                if (socket != null) {\n                    try {\n                        socket.close();\n                    } catch (IOException closeEx) {\n                        LOG.debug(\"Error closing socket after connect/auth failure\", closeEx);\n                    }\n                }\n                LOG.warn(\"Connect/auth failed for {}\", endpoint, connectOrAuthEx);\n                backoff =\n                        Math.min(\n                                config.getMaxBackoffMs(),\n                                Math.max(backoff, config.getInitialBackoffMs()) * 2);\n                EdgeTransportConfig.sleepQuiet(backoff);\n            }\n        }\n        throw new IOException(\n                \"Cannot connect to edge ingress \"\n                        + endpoint\n                        + \" after \"\n                        + config.getMaxReconnectCycles()\n                        + \" cycles\");\n    }\n\n    private static final class SocketHolder implements AutoCloseable {\n        private final Socket socket;\n        private final BufferedReader reader;","sourceCodeStart":168,"sourceCodeEnd":204,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-edge-agent/seatunnel-edge-agent-transport/src/main/java/org/apache/seatunnel/edge/agent/transport/socket/EdgeTransportClient.java#L168-L204","documentation":"EdgeTransportClient.ensureAuthenticatedSession tries to establish and authenticate a socket to the configured endpoint. On connect or auth failure it closes the socket, logs 'Connect/auth failed for {endpoint}' with the exception, doubles the backoff up to maxBackoffMs, sleeps, and retries. The client eventually succeeds or the caller's timeout/interrupt surfaces the underlying error.","triggerScenarios":"open() or sendUntilReceived() -> session establishment fails: TCP connect refused/timed out, or authentication handshake rejected (bad credentials/token, protocol mismatch).","commonSituations":"Receiver not started or listening on a different port, firewall blocking the port, expired/rotated auth credentials on the agent, or hostname misconfiguration in the endpoint.","solutions":["Verify the endpoint host:port is correct and the receiver is listening (`nc -vz host port`).","Check agent credentials/token against the receiver's current auth config (rotation is the usual culprit).","Open firewall/security-group rules for the transport port.","Review backoff logs: repeated failures with growing backoff indicate a persistent config/network problem, not a transient one."],"exampleFix":"// before: wrong port after receiver reconfiguration\ntransport {\n  endpoint = \"10.0.0.5:5801\"\n}\n// after\ntransport {\n  endpoint = \"10.0.0.5:5802\"\n}","handlingStrategy":"retry","validationCode":"# Validate endpoint and auth before starting the agent\nnc -zv \"$HOST\" \"$PORT\" || echo 'endpoint unreachable'\n# verify credential freshness\n./agent auth verify --endpoint \"$ENDPOINT\"","typeGuard":null,"tryCatchPattern":"try {\n    client.open();\n} catch (IOException e) {\n    // after repeated 'Connect/auth failed' warnings with max backoff,\n    // escalate: check endpoint reachability and rotate credentials\n    alert(\"transport cannot connect to \" + endpoint + \": \" + e.getMessage());\n}","preventionTips":["Validate endpoint host:port in agent config at startup.","Automate credential/token rotation and verify before expiry.","Open firewall rules for the transport port in every environment.","Watch backoff patterns: capped max-backoff retries signal persistent config problems."],"tags":["network","authentication","connect","backoff"],"backgroundTag":"connection-refused","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}