ItemReader unable to read rows via PrestoDriver

Question

The following ItemReader bean read rows via PrestDriver. When executing the batch I am getting the this error message:

org.springframework.batch.core.step.skip.NonSkippableReadException: Non-skippable exception during read
at org.springframework.batch.core.step.item.FaultTolerantChunkProvider.read(FaultTolerantChunkProvider.java:105) ~[spring-batch-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:126) ~[spring-batch-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]

.....

Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: Attempt to process next row 
failed; SQL [SELECT * FROM ......]; getRow; nested exception is 
java.sql.SQLFeatureNotSupportedException: getRow

ItemReader code

@Bean
public ItemReader<ExportDto> itemReader() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName("com.facebook.presto.jdbc.PrestoDriver");
    dataSource.setUrl("jdbc:presto: ");
    dataSource.setUsername("....");
    dataSource.setPassword("....");

    JdbcCursorItemReader<ExportDto> reader = new JdbcCursorItemReader<ExportDto>();
    reader.setDataSource(dataSource);
    reader.setSql("SELECT * FROM .....'");
    BeanPropertyRowMapper<ExportDto> rowMapper = new BeanPropertyRowMapper<>(ExportDto.class);
    reader.setRowMapper(rowMapper);
    return reader;
}

I have created an “hello world” app in order to test the driver, this time using plain JDBCDriver. This test was successful.

 String url = "jdbc:presto:.....";
    Properties properties = new Properties();
    properties.setProperty("user", "....");
    properties.setProperty("password", "....");
    properties.setProperty("SSL", "true");
    try {
        Connection conn = DriverManager.getConnection(url, properties);
        if (conn == null) {
            System.out.print("NULL");
        } else {
            Statement stmt = conn.createStatement();
            String sql = "SELECT distinct .....";
            ResultSet rs = stmt.executeQuery(sql);
            // Extract data from result set
            while (rs.next()) {
                // Retrieve by column name
                String programs = rs.getString("prg");
            }
            // Clean-up environment
            rs.close();
            stmt.close();
            conn.close();
        }

Any ideas why this happen? or some workarounds will be appreciated.

Thank you

Answer 1

By default, the JdbcCursorItemReader verifies the cursor's position after each processed row. This check involves a call to ResultSet#getRow() which does not seem to be supported as mentioned in the comment above.

You can disable this check using JdbcCursorItemReader#setVerifyCursorPosition until this feature is supported in the Presto Driver.