Spark streaming data from kafka topic and write into the text files in external path

I want to read a data from kafka topic and group by key values, and write into text files..

public static void main(String args) throws Exception {

        SparkSession spark=SparkSession

                .builder()

                .appName("Sparkconsumer")

                .master("local[*]")

                .getOrCreate();

        SQLContext sqlContext = spark.sqlContext();

        SparkContext context = spark.sparkContext();

        Dataset<Row>lines=spark

                .readStream()

                .format("kafka")

                .option("kafka.bootstrap.servers", "localhost:9092")

                .option("subscribe","test-topic")

                .load();

    Dataset<Row> r=  lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");

        r.printSchema();

        r.createOrReplaceTempView("basicView");

        sqlContext.sql("select * from basicView")

        .selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")

        .writeStream()

        .outputMode("append")

        .format("console")

        .option("path","usr//path")

        .start()

        .awaitTermination();

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter

– Aydin K.
Nov 23 '18 at 7:38

1

What is the error you are getting ?

– mrsrinivas
Nov 23 '18 at 8:50

Not sure I understand why you'd use Spark for this

– cricket_007
Nov 23 '18 at 16:13

@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error

– user10030515
Nov 23 '18 at 16:16

@cricket_007 I want streaming the data from Kafka topic..

– user10030515
Nov 23 '18 at 16:17

|
show 4 more comments

I want to read a data from kafka topic and group by key values, and write into text files..

public static void main(String args) throws Exception {

        SparkSession spark=SparkSession

                .builder()

                .appName("Sparkconsumer")

                .master("local[*]")

                .getOrCreate();

        SQLContext sqlContext = spark.sqlContext();

        SparkContext context = spark.sparkContext();

        Dataset<Row>lines=spark

                .readStream()

                .format("kafka")

                .option("kafka.bootstrap.servers", "localhost:9092")

                .option("subscribe","test-topic")

                .load();

    Dataset<Row> r=  lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");

        r.printSchema();

        r.createOrReplaceTempView("basicView");

        sqlContext.sql("select * from basicView")

        .selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")

        .writeStream()

        .outputMode("append")

        .format("console")

        .option("path","usr//path")

        .start()

        .awaitTermination();

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter

– Aydin K.
Nov 23 '18 at 7:38

1

What is the error you are getting ?

– mrsrinivas
Nov 23 '18 at 8:50

Not sure I understand why you'd use Spark for this

– cricket_007
Nov 23 '18 at 16:13

@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error

– user10030515
Nov 23 '18 at 16:16

@cricket_007 I want streaming the data from Kafka topic..

– user10030515
Nov 23 '18 at 16:17

|
show 4 more comments

I want to read a data from kafka topic and group by key values, and write into text files..

public static void main(String args) throws Exception {

        SparkSession spark=SparkSession

                .builder()

                .appName("Sparkconsumer")

                .master("local[*]")

                .getOrCreate();

        SQLContext sqlContext = spark.sqlContext();

        SparkContext context = spark.sparkContext();

        Dataset<Row>lines=spark

                .readStream()

                .format("kafka")

                .option("kafka.bootstrap.servers", "localhost:9092")

                .option("subscribe","test-topic")

                .load();

    Dataset<Row> r=  lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");

        r.printSchema();

        r.createOrReplaceTempView("basicView");

        sqlContext.sql("select * from basicView")

        .selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")

        .writeStream()

        .outputMode("append")

        .format("console")

        .option("path","usr//path")

        .start()

        .awaitTermination();

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

I want to read a data from kafka topic and group by key values, and write into text files..

public static void main(String args) throws Exception {

        SparkSession spark=SparkSession

                .builder()

                .appName("Sparkconsumer")

                .master("local[*]")

                .getOrCreate();

        SQLContext sqlContext = spark.sqlContext();

        SparkContext context = spark.sparkContext();

        Dataset<Row>lines=spark

                .readStream()

                .format("kafka")

                .option("kafka.bootstrap.servers", "localhost:9092")

                .option("subscribe","test-topic")

                .load();

    Dataset<Row> r=  lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");

        r.printSchema();

        r.createOrReplaceTempView("basicView");

        sqlContext.sql("select * from basicView")

        .selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")

        .writeStream()

        .outputMode("append")

        .format("console")

        .option("path","usr//path")

        .start()

        .awaitTermination();

java apache-spark apache-kafka spark-structured-streaming

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

edited Nov 23 '18 at 16:20

cricket_007

81.2k1142111

asked Nov 23 '18 at 7:36

user10030515

asked Nov 23 '18 at 7:36

user10030515

asked Nov 23 '18 at 7:36

user10030515

format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter

– Aydin K.
Nov 23 '18 at 7:38

1

What is the error you are getting ?

– mrsrinivas
Nov 23 '18 at 8:50

Not sure I understand why you'd use Spark for this

– cricket_007
Nov 23 '18 at 16:13

@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error

– user10030515
Nov 23 '18 at 16:16

@cricket_007 I want streaming the data from Kafka topic..

– user10030515
Nov 23 '18 at 16:17

|
show 4 more comments

format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter

– Aydin K.
Nov 23 '18 at 7:38

1

What is the error you are getting ?

– mrsrinivas
Nov 23 '18 at 8:50

Not sure I understand why you'd use Spark for this

– cricket_007
Nov 23 '18 at 16:13

@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error

– user10030515
Nov 23 '18 at 16:16

@cricket_007 I want streaming the data from Kafka topic..

– user10030515
Nov 23 '18 at 16:17

format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter

– Aydin K.
Nov 23 '18 at 7:38

What is the error you are getting ?

– mrsrinivas
Nov 23 '18 at 8:50

Not sure I understand why you'd use Spark for this

– cricket_007
Nov 23 '18 at 16:13

@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error

– user10030515
Nov 23 '18 at 16:16

@cricket_007 I want streaming the data from Kafka topic..

– user10030515
Nov 23 '18 at 16:17

|
show 4 more comments

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