Re: Why this example does not save anything to file?

podunk Fri, 29 Jul 2022 13:11:56 -0700

In Eclipse only:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner (file:/C:/Flink/flink-1.14.4/lib/flink-dist_2.11-1.14.4.jar) to field java.lang.String.value
WARNING: Please consider reporting this to the maintainers of org.apache.flink.api.java.ClosureCleaner
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

In Flink logs:

2022-07-29 22:04:15,835 INFO org.apache.flink.api.java.typeutils.TypeExtractor            [] - class org.apache.flink.streaming.api.functions.source.TimestampedFileInputSplit does not contain a setter for field modificationTime
2022-07-29 22:04:15,836 INFO org.apache.flink.api.java.typeutils.TypeExtractor            [] - Class class org.apache.flink.streaming.api.functions.source.TimestampedFileInputSplit cannot be used as a POJO type because not all fields are valid POJO fields, and must be processed as GenericType. Please read the Flink documentation on "Data Types & Serialization" for details of the effect on performance.
2022-07-29 22:04:15,949 INFO org.apache.flink.client.program.rest.RestClusterClient       [] - Submitting job 'insert-into_default_catalog.default_database.fs_table' (064e2e154028411712786c61a79221bf).

I do not think anything is wrong with these fields - they are correctly declared.

I see similar issue: https://issues.apache.org/jira/browse/FLINK-12410

This is a bug?

Sent: Tuesday, July 26, 2022 at 3:40 PM
From: "Weihua Hu" <huweihua....@gmail.com>
To: pod...@gmx.com
Cc: "user" <user@flink.apache.org>
Subject: Re: Why this example does not save anything to file?

Hi,

Can you see any exception logs?

Where is this code running? is it a standalone cluster with one TaskManager?

Best,
Weihua

On Tue, Jul 26, 2022 at 4:18 AM <pod...@gmx.com> wrote:

If I get it correctly this is the way how I can save to CSV:

https://nightlies.apache.org/flink/flink-docs-master/docs/connectors/table/filesystem/#full-example

So my code is (read from file, save to file):

package flinkCSV;

import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.TableEnvironment;

public class flinkCSV {

   public static void main(String[] args) throws Exception {


       //register and create table
       EnvironmentSettings settings = EnvironmentSettings
                .newInstance()
                //.inStreamingMode()
                .inBatchMode()
                .build();

       final TableEnvironment tEnv = TableEnvironment.create(settings);


       tEnv.executeSql("CREATE TABLE Table1 (column_name1 STRING, column_name2 DOUBLE) WITH ('connector.type' = 'filesystem', 'connector.path' = 'file:///C:/temp/test4.txt', 'format.type' = 'csv')");

        tEnv.sqlQuery("SELECT COUNT(*) AS Table1_result FROM Table1")
        .execute()
        .print();


        tEnv.executeSql("CREATE TABLE fs_table ("
               + "   column_nameA STRING, "
               + "   column_nameB DOUBLE "
               + "   ) WITH ( \n"
               + "   'connector'='filesystem', "
               + "   'path'='file:///C:/temp/test5.txt', "
               + "   'format'='csv', "
               + " 'sink.partition-commit.delay'='1 s', "
               + " 'sink.partition-commit.policy.kind'='success-file'"
               + "   )");

        tEnv.executeSql("INSERT INTO fs_table SELECT column_name1, column_name2 from Table1");

        tEnv.sqlQuery("SELECT COUNT(*) AS fs_table_result FROM fs_table")
        .execute()
        .print();

   }
}

Source file (test4.txt) is:

aa; 23
bb; 657.9
cc; 55

test5.txt is not created, select from fs_table gives null

Re: Why this example does not save anything to file?

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