Fatal error Attempted to dereference unique_ptr that is NULL!

[nnagula]

getting Original error: "Attempted to dereference unique_ptr that is NULL!" while querring a duckdb table, I am using duckdb 1.3.1.0 jdbc driver

[staticlibs]

Hi, thanks for the report! Can you provide any details how to reproduce this problem?

[nnagula]

I have three schedular methods running continuously one at every 1 sec interval for data logging into duckdb tables, and other two are at every 10 secs interval to fetch the reports from duckdb tables.

public synchronized int buildDuckData(ZonedDateTime pStartDate, ZonedDateTime pEndDate, String pSite, String pArea, String pDatasource, String pCurrentUser) { int value = initMemoryTables(pDatasource); log.info("initMemoryTables: {}", value); Map<String, Boolean> valueMap = fetchData(pStartDate, pEndDate, pDatasource); List<String> memoryTables = AppConfig.memoryTableList(); // move to duckDB AtomicInteger result = new AtomicInteger(0); memoryTables.stream().forEach(tableName -> { String jsonFile = tableName(AppConstants.JSON_FORMAT, tableName, pDatasource); if (valueMap.get(tableName)) { String query = null; String dbTableName = duckTable(tableName, false); Connection connection = null; PreparedStatement preparedStatement = null; try { connection = JdbcUtils.getConnection(pDatasource); connection.setAutoCommit(false); Map<String, Class<?>> columnMap = AppConfig.getTable(tableName); // insert data query = String.format(insertBuilder(columns, AppConstants.JSON_FORMAT), dbTableName, jsonFile, dbTableName); preparedStatement = connection.prepareStatement(query); rows = preparedStatement.executeUpdate(); preparedStatement.close(); if (AppConfig.logger() && !AppConfig.ignition()) { log.debug("rows {}, insert {}", rows, query); } connection.commit(); } catch (SQLException e) { try { connection.rollback(); } catch (Exception se) { log.error("rollback error: {} query = {}", e.getMessage(), query, e); } log.error("error: {} query = {}", e.getMessage(), query, e); } finally { try { if (preparedStatement != null) preparedStatement.close(); if (connection != null) connection.close(); } catch (SQLException e) { log.error("error: {} query = {}", e.getMessage(), query, e); } } } result.incrementAndGet(); appUtils.deleteFile(new File(jsonFile)); }); return result.get() == memoryTables.size() ? 1 : 0; }

This method runs every 1 sec inteval. and it transfers the data for 21 tables., the other methods are related to reports, those methods use the similar way to open/close jdbc connection