c34c42234f
## What changes were proposed in this pull request? When I try to run scripts (e.g. `start-master.sh`/`start-history-server.sh ` in latest master, I got such error: ``` Presence of build for multiple Scala versions detected. Either clean one of them or, export SPARK_SCALA_VERSION in spark-env.sh. ``` The error message is quite confusing. Without reading `load-spark-env.sh`, I didn't know which directory to remove, or where to find and edit the `spark-evn.sh`. This PR is to make the error message more clear. Also change the script for less maintenance when we add or drop Scala versions in the future. As now with https://github.com/apache/spark/pull/22967, we can revise the error message as following(in my local setup): ``` Presence of build for multiple Scala versions detected (/Users/gengliangwang/IdeaProjects/spark/assembly/target/scala-2.12 and /Users/gengliangwang/IdeaProjects/spark/assembly/target/scala-2.11). Remove one of them or, export SPARK_SCALA_VERSION=2.12 in /Users/gengliangwang/IdeaProjects/spark/conf/spark-env.sh. Visit https://spark.apache.org/docs/latest/configuration.html#environment-variables for more details about setting environment variables in spark-env.sh. ``` ## How was this patch tested? Manual test Closes #23049 from gengliangwang/reviseEnvScript. Authored-by: Gengliang Wang <gengliang.wang@databricks.com> Signed-off-by: Sean Owen <sean.owen@databricks.com>
66 lines
2.4 KiB
Bash
66 lines
2.4 KiB
Bash
#!/usr/bin/env bash
|
|
|
|
#
|
|
# Licensed to the Apache Software Foundation (ASF) under one or more
|
|
# contributor license agreements. See the NOTICE file distributed with
|
|
# this work for additional information regarding copyright ownership.
|
|
# The ASF licenses this file to You under the Apache License, Version 2.0
|
|
# (the "License"); you may not use this file except in compliance with
|
|
# the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
|
|
# This script loads spark-env.sh if it exists, and ensures it is only loaded once.
|
|
# spark-env.sh is loaded from SPARK_CONF_DIR if set, or within the current directory's
|
|
# conf/ subdirectory.
|
|
|
|
# Figure out where Spark is installed
|
|
if [ -z "${SPARK_HOME}" ]; then
|
|
source "$(dirname "$0")"/find-spark-home
|
|
fi
|
|
|
|
SPARK_ENV_SH="spark-env.sh"
|
|
if [ -z "$SPARK_ENV_LOADED" ]; then
|
|
export SPARK_ENV_LOADED=1
|
|
|
|
export SPARK_CONF_DIR="${SPARK_CONF_DIR:-"${SPARK_HOME}"/conf}"
|
|
|
|
SPARK_ENV_SH="${SPARK_CONF_DIR}/${SPARK_ENV_SH}"
|
|
if [[ -f "${SPARK_ENV_SH}" ]]; then
|
|
# Promote all variable declarations to environment (exported) variables
|
|
set -a
|
|
. ${SPARK_ENV_SH}
|
|
set +a
|
|
fi
|
|
fi
|
|
|
|
# Setting SPARK_SCALA_VERSION if not already set.
|
|
|
|
if [ -z "$SPARK_SCALA_VERSION" ]; then
|
|
SCALA_VERSION_1=2.12
|
|
SCALA_VERSION_2=2.11
|
|
|
|
ASSEMBLY_DIR_1="${SPARK_HOME}/assembly/target/scala-${SCALA_VERSION_1}"
|
|
ASSEMBLY_DIR_2="${SPARK_HOME}/assembly/target/scala-${SCALA_VERSION_2}"
|
|
ENV_VARIABLE_DOC="https://spark.apache.org/docs/latest/configuration.html#environment-variables"
|
|
if [[ -d "$ASSEMBLY_DIR_1" && -d "$ASSEMBLY_DIR_2" ]]; then
|
|
echo "Presence of build for multiple Scala versions detected ($ASSEMBLY_DIR_1 and $ASSEMBLY_DIR_2)." 1>&2
|
|
echo "Remove one of them or, export SPARK_SCALA_VERSION=$SCALA_VERSION_1 in ${SPARK_ENV_SH}." 1>&2
|
|
echo "Visit ${ENV_VARIABLE_DOC} for more details about setting environment variables in spark-env.sh." 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -d "$ASSEMBLY_DIR_1" ]]; then
|
|
export SPARK_SCALA_VERSION=${SCALA_VERSION_1}
|
|
else
|
|
export SPARK_SCALA_VERSION=${SCALA_VERSION_2}
|
|
fi
|
|
fi
|