Fabian Hueske created FLINK-6247:
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Summary: Build a jar-with-dependencies for flink-table and put it
into ./opt
Key: FLINK-6247
URL: https://issues.apache.org/jira/browse/FLINK-6247
Project: Flink
Issue Type: Improvement
Components: Build System, Table API & SQL
Affects Versions: 1.3.0
Reporter: Fabian Hueske
Assignee: sunjincheng
Due to a problem with Calcite and the unloading of classes, user-code
classloaders that include Calcite cannot be garbage collected. This is a
problem for long-running clusters that execute multiple Table API / SQL
programs with fat JARs that include the flink-table dependency. Each executed
program comes with an own user-code classloader that cannot be cleaned up later.
As a workaround, we recommend to copy the flink-table dependency into the ./lib
folder. However, we do not have a jar file with all required transitive
dependencies (Calcite, Janino, etc). Hence, users would need to build this jar
file themselves or copy all jars into ./lib.
This issue is about creating a jar-with-dependencies and adding it to the ./opt
folder. Users can then copy the jar file from ./opt to ./lib to include the
table API in the classpath of Flink.
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