Spark batch write to Kafka topic from multi-column DataFrame
After the batch, Spark ETL I need to write to Kafka topic the resulting DataFrame that contains multiple different columns.
According to the following Spark documentation https://spark.apache.org/docs/2.2.0/structured-streaming-kafka-integration.html the Dataframe being written to Kafka should have the following mandatory column in schema:
value (required) string or binary
As I mentioned previously, I have much more columns with values so I have a question - how to properly send the whole DataFrame row as a single message to Kafka topic from my Spark application? Do I need to join all of the values from all columns into the new DataFrame with a single value column(that will contain the joined value) or there is more proper way to achieve it?
apache-spark apache-kafka apache-spark-sql
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
add a comment |
After the batch, Spark ETL I need to write to Kafka topic the resulting DataFrame that contains multiple different columns.
According to the following Spark documentation https://spark.apache.org/docs/2.2.0/structured-streaming-kafka-integration.html the Dataframe being written to Kafka should have the following mandatory column in schema:
value (required) string or binary
As I mentioned previously, I have much more columns with values so I have a question - how to properly send the whole DataFrame row as a single message to Kafka topic from my Spark application? Do I need to join all of the values from all columns into the new DataFrame with a single value column(that will contain the joined value) or there is more proper way to achieve it?
apache-spark apache-kafka apache-spark-sql
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
add a comment |
After the batch, Spark ETL I need to write to Kafka topic the resulting DataFrame that contains multiple different columns.
According to the following Spark documentation https://spark.apache.org/docs/2.2.0/structured-streaming-kafka-integration.html the Dataframe being written to Kafka should have the following mandatory column in schema:
value (required) string or binary
As I mentioned previously, I have much more columns with values so I have a question - how to properly send the whole DataFrame row as a single message to Kafka topic from my Spark application? Do I need to join all of the values from all columns into the new DataFrame with a single value column(that will contain the joined value) or there is more proper way to achieve it?
apache-spark apache-kafka apache-spark-sql
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
After the batch, Spark ETL I need to write to Kafka topic the resulting DataFrame that contains multiple different columns.
According to the following Spark documentation https://spark.apache.org/docs/2.2.0/structured-streaming-kafka-integration.html the Dataframe being written to Kafka should have the following mandatory column in schema:
value (required) string or binary
As I mentioned previously, I have much more columns with values so I have a question - how to properly send the whole DataFrame row as a single message to Kafka topic from my Spark application? Do I need to join all of the values from all columns into the new DataFrame with a single value column(that will contain the joined value) or there is more proper way to achieve it?
apache-spark apache-kafka apache-spark-sql
apache-spark apache-kafka apache-spark-sql
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
asked Nov 23 '18 at 14:36
alexanoidalexanoid
7,4751184186
7,4751184186
add a comment |
add a comment |
1 Answer
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The proper way to do that is already hinted by the docs, and doesn't really differ form what you'd do with any Kafka client - you have to serialize the payload before sending to Kafka.
How you you'll do that (to_json, to_csv, Apache Avro) depends on your business requirements - nobody can answers this but you (or your team).
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The proper way to do that is already hinted by the docs, and doesn't really differ form what you'd do with any Kafka client - you have to serialize the payload before sending to Kafka.
How you you'll do that (to_json, to_csv, Apache Avro) depends on your business requirements - nobody can answers this but you (or your team).
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
add a comment |
The proper way to do that is already hinted by the docs, and doesn't really differ form what you'd do with any Kafka client - you have to serialize the payload before sending to Kafka.
How you you'll do that (to_json, to_csv, Apache Avro) depends on your business requirements - nobody can answers this but you (or your team).
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
add a comment |
The proper way to do that is already hinted by the docs, and doesn't really differ form what you'd do with any Kafka client - you have to serialize the payload before sending to Kafka.
How you you'll do that (to_json, to_csv, Apache Avro) depends on your business requirements - nobody can answers this but you (or your team).
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
The proper way to do that is already hinted by the docs, and doesn't really differ form what you'd do with any Kafka client - you have to serialize the payload before sending to Kafka.
How you you'll do that (to_json, to_csv, Apache Avro) depends on your business requirements - nobody can answers this but you (or your team).
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
edited Dec 1 '18 at 12:24
alexanoid
7,4751184186
7,4751184186
answered Nov 23 '18 at 14:43
user10696091user10696091
461
answered Nov 23 '18 at 14:43
user10696091user10696091
461
answered Nov 23 '18 at 14:43
user10696091user10696091
461
461
add a comment |
add a comment |
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