I need to log the file directly in parquet format using Log4j for some analytics requirements. Is there any way we can do that directly?
Related
I want to use Apache NiFi for writing some data encoded in Avro to Apache Kafka.
Therefore i use the ConvertRecord processor for converting from JSON to Avro. For Avro the AvroRecordSetWriter with ConfluentSchemaRegistry is used. The schema url is set to http:<hostname>:<port>/apis/ccompat/v6 (hostname/port are not important for this question). For having a free alternative to Confluent Schema Registry i deployed a Apicurio Schema Registry. The ccompat API should be compatible to Confluent.
But when i run the NiFi pipeline i get the following error, that the schema with the given name is not found:
Could not retrieve schema with the given name [...] from the configured Schema Registry
But i definitely created the Avro schema with this name in the Web-UI of Apicurio Registry.
Can someone please help me? Is there anybody who is using NiFi for Avro encoding in Kafka by using Apicurio Schema Registry?
Update:
Here are some screenshots of my pipeline and its configuration.
Set schema name via UpdateAttribute
Use ConvertRecord with JsonTreeReader
and ConfluentSchemaRegistry
and AvroSetWriter
Update 2:
This artifact id has to be set:
I am trying to read parquet file in Spring Batch Job and write is to JDBC. Is there any sample code for reader bean which can be used in springframework batch StepBuilderFactory?
Spring for Apache Hadoop has capabilities for reading and writing Parquet files. You can read more about that project here: https://spring.io/projects/spring-hadoop
We have been using YAML for our liquibase changelogs but would like to switch to using JSON. Is there a way to get liquibase to load changelogs in both yaml and json formats so that we don't have to go through a conversion process?
If the files have to be converted, how can the converted files be deployed considering that the file hashes are going to change (or perhaps they don't change because the hash is based on the parsed object and not the file format?).
We are using SpringBoot if that matters for configuration.
I have a scenario where I have some set of avro files in HDFS.And I need generate Avro Schema files for those AVRO data files in HDFS.I tried researching using Spark (https://github.com/databricks/spark-avro/blob/master/src/main/scala/com/databricks/spark/avro/SchemaConverters.scala).
Is there any other than bringing the AVRO data file to local and doing HDFS PUT .
Any Suggestions are welcomed.Thanks !
Every avro file incorporates in it avro schema that it was written with. You can extract this schema using avro-tools.jar(download from maven). You can download only one part(assuming all other files were written with same schema) and use avro tools(java -jar ~/workspace/avro-tools-1.7.7.jar getschema xxx.avro) to extract it
How to write log4j log file directly to Hadoop Distributed File System ? with out using FLUME, Scribe, Kafka. any other way