Arseniy Tashoyan created SPARK-34345:
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Summary: Allow several files property files
Key: SPARK-34345
URL: https://issues.apache.org/jira/browse/SPARK-34345
Project: Spark
Issue Type: Improvement
Components: Spark Submit
Affects Versions: 3.0.1
Reporter: Arseniy Tashoyan
Example: we have 2 applications A and B. These applications have some common
Spark settings and some application-specific settings. The idea is to run them
like this:
{code:bash}
spark-submit --properties-files common.properties,a.properties A
spark-submit --properties-files common.properties,b.properties B
{code}
Benefits:
- Common settings can be extracted to a common file _common.properties_, no
need to copy them over _a.properties_ and _b.properties_
- Applications can override common settings in their respective custom
properties files
Currently the following mechanism works in SparkSubmitArguments.scala: console
arguments like _--conf key=value_ overwrite settings in the properties file.
This is not enough, because console arguments should be specified in the
launcher script; de-facto they belong to the binary distribution rather than
the configuration.
Consider the following scenario: Spark on Kubernetes, the configuration is
provided as a ConfigMap. We could have the following ConfigMaps:
- _a.properties_ // mount to the Pod with application A
- _b.properties_ // mount to the Pod with application B
- _common.properties_ // mount to both Pods with A and B
Meanwhile the launcher script _app-submit.sh_ is the same for both applications
A and B, since it contains none configuration settings:
{code:bash}
spark-submit --properties-files common.properties,${app_name}.properties ...
{code}
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