{"record":{"id":"4f207b0ecac005da","repo":"apache/seatunnel","slug":"read-the-binlog-offset-error-4f207b","errorCode":null,"errorMessage":"Read the binlog offset error","messagePattern":"Read the binlog offset error","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"seatunnel-connectors-v2/connector-cdc/connector-cdc-postgres/src/main/java/org/apache/seatunnel/connectors/seatunnel/cdc/postgres/source/offset/LsnOffsetFactory.java","lineNumber":69,"sourceCode":"        this.dialect = dialect;\n    }\n\n    @Override\n    public Offset earliest() {\n        return LsnOffset.INITIAL_OFFSET;\n    }\n\n    @Override\n    public Offset neverStop() {\n        return LsnOffset.NO_STOPPING_OFFSET;\n    }\n\n    @Override\n    public Offset latest() {\n        try (JdbcConnection jdbcConnection = dialect.openJdbcConnection(sourceConfig)) {\n            return PostgresUtils.currentLsn((PostgresConnection) jdbcConnection);\n        } catch (Exception e) {\n            throw new RuntimeException(\"Read the binlog offset error\", e);\n        }\n    }\n\n    @Override\n    public Offset committedOffset() {\n        String slotName = sourceConfig.getDbzConfiguration().getString(\"slot.name\");\n        try (JdbcConnection jdbcConnection = dialect.openJdbcConnection(sourceConfig)) {\n            try (PreparedStatement statement =\n                    jdbcConnection\n                            .connection()\n                            .prepareStatement(\n                                    \"SELECT confirmed_flush_lsn::text, active_pid FROM pg_replication_slots WHERE slot_name = ?\")) {\n                statement.setString(1, slotName);\n                try (ResultSet resultSet = statement.executeQuery()) {\n                    return readCommittedOffset(resultSet, slotName);\n                }\n            }\n        } catch (SeaTunnelRuntimeException e) {","sourceCodeStart":51,"sourceCodeEnd":87,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-cdc/connector-cdc-postgres/src/main/java/org/apache/seatunnel/connectors/seatunnel/cdc/postgres/source/offset/LsnOffsetFactory.java#L51-L87","documentation":"LsnOffsetFactory.latest() opens a JDBC connection to PostgreSQL to read the current LSN (write-ahead-log position) used as the newest offset. If the connection or the currentLSN query fails for any reason it wraps the exception in a RuntimeException with message 'Read the binlog offset error' (Postgres has no binlog; the message is inherited from MySQL-CDC phrasing).","triggerScenarios":"Calling latest() during split enumeration/startup when the JDBC connection cannot be opened, credentials are wrong, the host is unreachable, or `PostgresUtils.currentLsn` fails (e.g. non-primary node or pg_current_wal_lsn() unavailable).","commonSituations":"Wrong hostname/port/database in source config; firewall or VPC blocking the DB port; read-replica used where LSN functions are restricted; expired credentials.","solutions":["Verify JDBC connectivity with the same credentials via psql or a plain JDBC test.","Confirm you are connecting to the primary node (LSN reads require it).","Check network/firewall rules between the SeaTunnel worker and PostgreSQL.","Inspect the wrapped cause exception for the underlying SQL/connection error."],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// Validate connectivity before starting the job\ntry (Connection c = DriverManager.getConnection(jdbcUrl, user, pass)) {\n    c.createStatement().executeQuery(\"SELECT pg_current_wal_lsn()\");\n}","typeGuard":null,"tryCatchPattern":"try {\n    Offset o = factory.latest();\n} catch (RuntimeException e) {\n    // inspect e.getCause() for SQL/connection error, retry with backoff\n}","preventionTips":["Test JDBC connectivity to the primary before submitting the job","Open firewall rules between workers and the database port","Use primary node address, not a read replica","Rotate credentials without breaking long-running jobs"],"tags":["postgresql","cdc","jdbc","offset","network"],"backgroundTag":"database-query-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"}