commit | 516a40d8c4eb67cad07a379f28e92fbfb4f459d0 | [log] [tgz] |
---|---|---|
author | mynameborat <bharath.kumarasubramanian@gmail.com> | Sat Sep 11 10:40:24 2021 -0700 |
committer | GitHub <noreply@github.com> | Sat Sep 11 10:40:24 2021 -0700 |
tree | 680ca1b36a0fe47459a20008c20af8ca1d7a4be6 | |
parent | 041075cd5d83e20952970c2be17e3e3911d9ccd8 [diff] |
SAMZA-2663: Handle job model expiration and new job model flows for multiple incomplete rebalances (#1528) Problem: As part of SAMZA-2638, we introduced skipping container restart and stops on no changes to work assignment for processors across rebalances. However, we only update the active job model with the proposed job model on starting the container as part of onNewJobModel. This leads to a scenario where the processor is stopped but the future rebalances assume the container is still running. More information on scenario below. Changes: Track job model expiration onNewJobModel triggers new job model as long as the active job model has been expired Handle no change in work assignment optimization only during checkJobModelExpired flow.
Apache Samza is a distributed stream processing framework. It uses Apache Kafka for messaging, and Apache Hadoop YARN to provide fault tolerance, processor isolation, security, and resource management.
Samza's key features include:
Check out Hello Samza to try Samza. Read the Background page to learn more about Samza.
To build Samza from a git checkout, run:
./gradlew clean build
To build Samza from a source release, it is first necessary to download the gradle wrapper script above. This bootstrapping process requires Gradle to be installed on the source machine. Gradle is available through most package managers or directly from its website. To bootstrap the wrapper, run:
gradle -b bootstrap.gradle
After the bootstrap script has completed, the regular gradlew instructions below are available.
Samza builds with Scala 2.11 or 2.12 and YARN 2.6.1, by default. Use the -PscalaSuffix switches to change Scala versions. Samza supports building Scala with 2.11 and 2.12.
./gradlew -PscalaSuffix=2.11 clean build
To run all tests:
./gradlew clean test
To run a single test:
./gradlew clean :samza-test:test -Dtest.single=TestStatefulTask
To run key-value performance tests:
./gradlew samza-shell:kvPerformanceTest -PconfigPath=file://$PWD/samza-test/src/main/config/perf/kv-perf.properties
To run yarn integration tests:
./bin/integration-tests.sh <dir> yarn-integration-tests
To run standalone integration tests:
./bin/integration-tests.sh <dir> standalone-integration-tests
./gradlew checkstyleMain checkstyleTest
To run a job (defined in a properties file):
./gradlew samza-shell:runJob -PconfigPath=/path/to/job/config.properties
To inspect a job's latest checkpoint:
./gradlew samza-shell:checkpointTool -PconfigPath=/path/to/job/config.properties
To modify a job's checkpoint (assumes that the job is not currently running), give it a file with the new offset for each partition, in the format systems.<system>.streams.<topic>.partitions.<partition>=<offset>
:
./gradlew samza-shell:checkpointTool -PconfigPath=/path/to/job/config.properties \ -PnewOffsets=file:///path/to/new/offsets.properties
To get Eclipse projects, run:
./gradlew eclipse
For IntelliJ, run:
./gradlew idea
To start contributing on Samza please read Rules and Contributor Corner. Notice that Samza git repository does not support git pull request.
Apache Samza is a top level project of the Apache Software Foundation.