petartushev opened a new issue, #11445:
URL: https://github.com/apache/iceberg/issues/11445
### Query engine
I'm using flink as my engine.
### Question
I have a java data streaming app that uses flink to process records from
kafka that I want to store in iceberg tables with minio as blob storage using a
REST iceberg catalog. I used part of the spark docker-compose from the iceberg
docs to set up my iceberg and minio services, and my own kafka and flink
services that are defined as:
```
version: "3"
services:
jobmanager:
image: flink:1.19.1-java11
expose:
- "6121"
ports:
- "8081:8081"
command: jobmanager
environment:
- JOB_MANAGER_RPC_ADDRESS=jobmanager
taskmanager:
image: flink:1.19.1-java11
expose:
- "6122"
- "6123"
depends_on:
- jobmanager
command: taskmanager
links:
- "jobmanager:jobmanager"
environment:
- JOB_MANAGER_RPC_ADDRESS=jobmanager
zookeeper:
image: wurstmeister/zookeeper:latest
expose:
- "2181"
kafka:
image: wurstmeister/kafka:2.13-2.8.1
depends_on:
- zookeeper
ports:
- "9092:9092"
expose:
- "9093"
environment:
KAFKA_ADVERTISED_LISTENERS:
INSIDE://kafka:9093,OUTSIDE://localhost:9092
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP:
INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXT
KAFKA_LISTENERS: INSIDE://0.0.0.0:9093,OUTSIDE://0.0.0.0:9092
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE
rest:
image: tabulario/iceberg-rest
container_name: iceberg-rest
networks:
iceberg_net:
ports:
- 8181:8181
environment:
- AWS_ACCESS_KEY_ID=admin
- AWS_SECRET_ACCESS_KEY=password
- AWS_REGION=us-east-1
- CATALOG_WAREHOUSE=s3://warehouse/
- CATALOG_IO__IMPL=org.apache.iceberg.aws.s3.S3FileIO
- CATALOG_S3_ENDPOINT=http://minio:9000
minio:
image: "minio/minio"
container_name: "minio"
environment:
- MINIO_ROOT_USER=admin
- MINIO_ROOT_PASSWORD=password
- MINIO_DOMAIN=minio
networks:
iceberg_net:
aliases:
- warehouse.minio
ports:
- 9001:9001
- 9000:9000
volumes:
- minio-data:/data
command: ["server", "/data", "--console-address", ":9001"]
mc:
depends_on:
- minio
image: minio/mc
container_name: mc
networks:
iceberg_net:
environment:
- AWS_ACCESS_KEY_ID=admin
- AWS_SECRET_ACCESS_KEY=password
- AWS_REGION=us-east-1
entrypoint: >
/bin/sh -c "
until (/usr/bin/mc config host add minio http://minio:9000 admin
password) do echo 'Waiting...' && sleep 1; done;
/usr/bin/mc rm -r --force minio/warehouse;
/usr/bin/mc mb minio/warehouse;
/usr/bin/mc policy set public minio/warehouse;
tail -f /dev/null
"
networks:
iceberg_net:
volumes:
minio-data:
```
My flink streaming application is defined as follows:
```
package org.example;
import com.google.gson.Gson;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.connector.kafka.source.KafkaSource;
import
org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer;
import org.apache.flink.streaming.api.CheckpointingMode;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.DataTypes;
import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.TableSchema;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;
import org.apache.flink.types.Row;
import org.apache.iceberg.Table;
import org.apache.iceberg.aws.s3.S3FileIO;
import org.apache.iceberg.catalog.TableIdentifier;
import org.apache.iceberg.flink.CatalogLoader;
import org.apache.iceberg.flink.TableLoader;
import org.apache.iceberg.flink.sink.FlinkSink;
import org.apache.hadoop.conf.Configuration;
import pojo.Transaction;
import timestamp_utils.TransactionWatermarkStrategy;
import java.util.HashMap;
import java.util.Map;
public class ProcessTransactions {
public static void main(String[] args) throws Exception {
KafkaSource<String> kafkaSource = KafkaSource.<String>builder()
.setBootstrapServers("localhost:9092")
.setTopics("transaction")
.setGroupId("transactions_group")
.setStartingOffsets(OffsetsInitializer.latest())
.setValueOnlyDeserializer(new SimpleStringSchema())
.build();
StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.getConfig().setAutoWatermarkInterval(2000L);
env.enableCheckpointing(30000); // e.g., 60000 for every minute
env.getCheckpointConfig().setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
StreamTableEnvironment tableEnvironment =
StreamTableEnvironment.create(env);
tableEnvironment.executeSql(
"CREATE CATALOG bank_transactions_catalog WITH (" +
" 'type'='iceberg'," +
"
'catalog-impl'='org.apache.iceberg.rest.RESTCatalog'," +
" 'uri'='http://localhost:8181'," +
" 'warehouse'='s3://warehouse/'," +
" 'io-impl'='org.apache.iceberg.aws.s3.S3FileIO'," +
" 's3.endpoint'='http://localhost:9000'," +
" 's3.access-key-id'='admin'," +
" 's3.secret-access-key'='password'," +
" 's3.path-style-access'='true'" +
")"
);
DataStream<String> dataStream = env.fromSource(kafkaSource,
WatermarkStrategy.noWatermarks(), "Kafka source");
DataStream<Transaction> transactionDataStream = dataStream.map(value
->
new Gson().fromJson(value, Transaction.class))
.assignTimestampsAndWatermarks(new
TransactionWatermarkStrategy());
TableSchema tableSchema = TableSchema.builder()
.field("transactionId", DataTypes.STRING())
.field("sendingClientAccountNumber", DataTypes.STRING())
.field("receivingClientAccountNumber", DataTypes.STRING())
.field("amount", DataTypes.DOUBLE())
.build();
Map<String, String> catalogProperties = new HashMap<>();
catalogProperties.put("uri", "http://localhost:8181";); // REST
Catalog URI
catalogProperties.put("warehouse", "s3://warehouse/"); // S3
warehouse location
catalogProperties.put("io-impl", S3FileIO.class.getName()); // Use
S3 File IO
catalogProperties.put("s3.endpoint", "http://minio:9000";); // MinIO
endpoint
catalogProperties.put("s3.access-key", "admin"); // MinIO access key
catalogProperties.put("s3.secret-key", "password"); // MinIO secret
key
catalogProperties.put("s3.path-style-access", "true"); // Required
for MinIO
Configuration hadoopConf = new Configuration();
hadoopConf.set("fs.s3a.access.key", "admin");
hadoopConf.set("fs.s3a.secret.key", "password");
hadoopConf.set("fs.s3a.endpoint", "http://minio:9000";);
hadoopConf.set("fs.s3a.path.style.access", "true");
CatalogLoader catalogLoader = CatalogLoader.custom(
"bank_transactions_catalog", // Name of the catalog
catalogProperties, // Catalog properties (e.g., S3 config)
hadoopConf, // Hadoop configuration
"org.apache.iceberg.rest.RESTCatalog" // Catalog
implementation class (REST)
);
tableEnvironment.executeSql(
"CREATE TABLE transactions (" +
"transactionId STRING NOT NULL, " +
"sendingClientAccountNumber STRING NOT NULL, " +
"receivingClientAccountNumber STRING NOT NULL, " +
"amount FLOAT NOT NULL " +
")" +
"WITH (" +
" 'connector' = 'iceberg', " +
" 'catalog-impl' =
'org.apache.iceberg.rest.RESTCatalog', " +
" 'catalog-name' = 'bank_transactions_catalog', " +
" 'database-name' = 'financial_transactions', " +
" 'table-name' = 'transactions', " +
" 'format' = 'parquet', " +
" 'warehouse' = 's3://warehouse/', " +
" 'io-impl' = 'org.apache.iceberg.aws.s3.S3FileIO',
" +
" 'catalog-rest.endpoint' = 'http://localhost:8181',
" +
" 's3.endpoint' = 'http://minio:9000', " +
" 's3.access-key-id' = 'admin', " +
" 's3.secret-access-key' = 'password', " +
" 's3.path-style-access' = 'true' " +
")"
);
TableLoader tableLoader = TableLoader.fromCatalog(catalogLoader,
TableIdentifier.of("financial_transactions", "transactions"));
DataStream<Row> rowDataStream = transactionDataStream.map(
transaction -> Row.of(transaction.getTransactionId(),
transaction.getSendingClientAccountNumber(),
transaction.getReceivingClientAccountNumber(),
transaction.getAmount())
);
FlinkSink.forRow(rowDataStream, tableSchema)
.tableLoader(tableLoader)
.overwrite(false)
.append();
try{
env.execute(ProcessTransactions.class.getName());
}
catch (Exception e){
e.printStackTrace();
}
}
}
```
If I run the application in debug mode, and I run the command:
`tableEnvironment.executeSql("SELECT * FROM transactions").collect()` I get the
error:
```
Unable to create a source for reading table
'bank_transactions_catalog.financial_transactions.transactions'.
Table options are:
'catalog-impl'='org.apache.iceberg.rest.RESTCatalog'
'catalog-name'='bank_transactions_catalog'
'catalog-rest.endpoint'='http://localhost:8181'
'connector'='iceberg'
'database-name'='financial_transactions'
'format'='parquet'
'io-impl'='org.apache.iceberg.aws.s3.S3FileIO'
's3.access-key-id'='admin'
's3.endpoint'='http://minio:9000'
's3.path-style-access'='true'
's3.secret-access-key'='******'
'table-name'='transactions'
'warehouse'='s3://warehouse/'
```
with the cause being: `java.lang.NullPointerException: Invalid uri for http
client: null`.
However, if the program is run without debug mode it gives me the error:
```
Exception in thread "main"
org.apache.iceberg.exceptions.NoSuchTableException: Table does not exist:
financial_transactions.transactions
```
This is a newbie problem, but for some time I cannot figure how to debug
this. Any help or general advice towards resolving this issue is welcome.
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