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https://issues.apache.org/jira/browse/SPARK-52687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-52687:
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Labels: pull-request-available (was: )
> pyspark startup script: Parsing of SPARK_CONNECT_MODE is error prone
> --------------------------------------------------------------------
>
> Key: SPARK-52687
> URL: https://issues.apache.org/jira/browse/SPARK-52687
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 4.0.0
> Reporter: Mario Grgic
> Priority: Minor
> Labels: pull-request-available
>
> I am using Apache Spark 4.0.0 and don't have {{SPARK_CONNECT_MODE}}
> environment variable set. When launching {{pyspark}} a message:
> ??The environment variable SPARK_CONNECT_MODE has unknown value or
> pyspark.util package is not available: 0??
> is always shown. Even after exporting the value for this environment
> variable, the message is still shown with the value of the variable instead
> of 0.
> Looking at the pyspark BASH script it looks like the value of the environment
> variable is calculated:
>
> {{export SPARK_CONNECT_MODE=$($PYSPARK_DRIVER_PYTHON -c "from pyspark.util
> import spark_connect_mode; print(spark_connect_mode())")}}
>
> which can (at least on my system) can contain newline and spaces (if the
> environment variable is not set). This is why the check below:
>
> {{if [[ "$SPARK_CONNECT_MODE" != "0" && "$SPARK_CONNECT_MODE" != "1" ]];
> then}}
> {{ echo "The environment variable SPARK_CONNECT_MODE has unknown value or
> pyspark.util package is not available: $SPARK_CONNECT_MODE"}}
> {{ unset SPARK_CONNECT_MODE}}
> {{fi}}
> fails. Note however, that this check will fail *always* even if
> {{SPARK_CONNECT_MODE}} is set to any value other than 0 or 1. So basically,
> the script will not accept valid values for this variable and will unset the
> value.
>
>
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