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There were several issues with test_rest_catalog_basic which made it fail in environments that used Ozone or S3. Missing dependency of Ozone and S3 classes: * This is resolved in iceberg-rest-catalog-test/pom.xml by adding a dependency to impala-executor-deps Hadoop configuration was initialized properly: * run-iceberg-rest-server.sh used Maven to run Iceberg REST Catalog in which case Maven is in charge of setting the CLASSPATH but the core-site/ozone-site/etc. config files were not on it, so the REST Catalog used a default Hadoop configuration that wasn't good for our environment. * To overcome the CLASSPATH problem now we create a runnable JAR in iceberg-rest-catalog-test/pom.xml and also generate the proper CLASSPATH during compilation. * run-iceberg-rest-server.sh now uses java -cp to run the REST Catalog S3 builds threw NoSuchMethodException for the "create" method of ApacheHttpClientConfigurations: * The Iceberg library dynamically load its http client builders to workaround an error, see details in https://github.com/apache/iceberg/issues/6715 * So the Iceberg lib dynamically wants to load the "create" method of its own ApacheHttpClientConfigurations class but it fails with NoSuchMethodException. * The critical code is invoked from Impala's IcebergMetadataScanner's ScanMetadataTable() method which happens to be invoked through JNI from the C++ backend. * The context class loader of such threads are NULL, which means Java will use the bootstrap class loader to load classes and methods, but that doesn't have the proper resources on its classpath. * To overcome this issue we set the context class loader for the thread to the class loader that originally loaded the IcebergMetadataScanner class. Change-Id: I9dc0e30aeaff0b8de41426ba38506383b4af472c Reviewed-on: http://gerrit.cloudera.org:8080/22818 Reviewed-by: Jason Fehr <jfehr@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Riza Suminto <riza.suminto@cloudera.com>
Welcome to Impala
Lightning-fast, distributed SQL queries for petabytes of data stored in open data and table formats.
Impala is a modern, massively-distributed, massively-parallel, C++ query engine that lets you analyze, transform and combine data from a variety of data sources:
- Best of breed performance and scalability.
- Support for data stored in Apache Iceberg, HDFS, Apache HBase, Apache Kudu, Amazon S3, Azure Data Lake Storage, Apache Hadoop Ozone and more!
- Wide analytic SQL support, including window functions and subqueries.
- On-the-fly code generation using LLVM to generate lightning-fast code tailored specifically to each individual query.
- Support for the most commonly-used Hadoop file formats, including Apache Parquet and Apache ORC.
- Support for industry-standard security protocols, including Kerberos, LDAP and TLS.
- Apache-licensed, 100% open source.
More about Impala
The fastest way to try out Impala is a quickstart Docker container. You can try out running queries and processing data sets in Impala on a single machine without installing dependencies. It can automatically load test data sets into Apache Kudu and Apache Parquet formats and you can start playing around with Apache Impala SQL within minutes.
To learn more about Impala as a user or administrator, or to try Impala, please visit the Impala homepage. Detailed documentation for administrators and users is available at Apache Impala documentation.
If you are interested in contributing to Impala as a developer, or learning more about Impala's internals and architecture, visit the Impala wiki.
Supported Platforms
Impala only supports Linux at the moment. Impala supports x86_64 and has experimental support for arm64 (as of Impala 4.0). Impala Requirements contains more detailed information on the minimum CPU requirements.
Supported OS Distributions
Impala runs on Linux systems only. The supported distros are
- Ubuntu 16.04/18.04
- CentOS/RHEL 7/8
Other systems, e.g. SLES12, may also be supported but are not tested by the community.
Export Control Notice
This distribution uses cryptographic software and may be subject to export controls. Please refer to EXPORT_CONTROL.md for more information.
Build Instructions
See Impala's developer documentation to get started.
Detailed build notes has some detailed information on the project layout and build.