Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3916#discussion_r25285364
--- Diff: bin/spark-class ---
@@ -110,83 +39,48 @@ else
exit 1
fi
fi
-JAVA_VERSION=$("$RUNNER" -version 2>&1 | grep 'version' | sed 's/.*
version "\(.*\)\.\(.*\)\..*"/\1\2/; 1q')
-
-# Set JAVA_OPTS to be able to load native libraries and to set heap size
-if [ "$JAVA_VERSION" -ge 18 ]; then
- JAVA_OPTS="$OUR_JAVA_OPTS"
-else
- JAVA_OPTS="-XX:MaxPermSize=128m $OUR_JAVA_OPTS"
-fi
-JAVA_OPTS="$JAVA_OPTS -Xms$OUR_JAVA_MEM -Xmx$OUR_JAVA_MEM"
-
-# Load extra JAVA_OPTS from conf/java-opts, if it exists
-if [ -e "$SPARK_CONF_DIR/java-opts" ] ; then
- JAVA_OPTS="$JAVA_OPTS `cat "$SPARK_CONF_DIR"/java-opts`"
-fi
-
-# Attention: when changing the way the JAVA_OPTS are assembled, the change
must be reflected in CommandUtils.scala!
-
-TOOLS_DIR="$FWDIR"/tools
-SPARK_TOOLS_JAR=""
-if [ -e
"$TOOLS_DIR"/target/scala-$SPARK_SCALA_VERSION/spark-tools*[0-9Tg].jar ]; then
- # Use the JAR from the SBT build
- export SPARK_TOOLS_JAR="`ls
"$TOOLS_DIR"/target/scala-$SPARK_SCALA_VERSION/spark-tools*[0-9Tg].jar`"
-fi
-if [ -e "$TOOLS_DIR"/target/spark-tools*[0-9Tg].jar ]; then
- # Use the JAR from the Maven build
- # TODO: this also needs to become an assembly!
- export SPARK_TOOLS_JAR="`ls "$TOOLS_DIR"/target/spark-tools*[0-9Tg].jar`"
-fi
-# Compute classpath using external script
-classpath_output=$("$FWDIR"/bin/compute-classpath.sh)
-if [[ "$?" != "0" ]]; then
- echo "$classpath_output"
- exit 1
-else
- CLASSPATH="$classpath_output"
-fi
+# Look for the launcher. In non-release mode, add the compiled classes
directly to the classpath
+# instead of looking for a jar file, since it's very common for people
using sbt to use the
+# "assembly" target instead of "package".
+SPARK_LAUNCHER_CP=
+if [ -f $SPARK_HOME/RELEASE ]; then
+ LAUNCHER_DIR="$SPARK_HOME/lib"
+ num_jars="$(ls -1 "$LAUNCHER_DIR" | grep "^spark-launcher.*\.jar$" | wc
-l)"
+ if [ "$num_jars" -eq "0" -a -z "$SPARK_LAUNCHER_CP" ]; then
+ echo "Failed to find Spark launcher in $LAUNCHER_DIR." 1>&2
+ echo "You need to build Spark before running this program." 1>&2
+ exit 1
+ fi
-if [[ "$1" =~ org.apache.spark.tools.* ]]; then
- if test -z "$SPARK_TOOLS_JAR"; then
- echo "Failed to find Spark Tools Jar in
$FWDIR/tools/target/scala-$SPARK_SCALA_VERSION/" 1>&2
- echo "You need to run \"build/sbt tools/package\" before running $1."
1>&2
+ LAUNCHER_JARS="$(ls -1 "$LAUNCHER_DIR" | grep "^spark-launcher.*\.jar$"
|| true)"
+ if [ "$num_jars" -gt "1" ]; then
+ echo "Found multiple Spark launcher jars in $LAUNCHER_DIR:" 1>&2
+ echo "$LAUNCHER_JARS" 1>&2
+ echo "Please remove all but one jar." 1>&2
exit 1
fi
- CLASSPATH="$CLASSPATH:$SPARK_TOOLS_JAR"
-fi
-if $cygwin; then
- CLASSPATH="`cygpath -wp "$CLASSPATH"`"
- if [ "$1" == "org.apache.spark.tools.JavaAPICompletenessChecker" ]; then
- export SPARK_TOOLS_JAR="`cygpath -w "$SPARK_TOOLS_JAR"`"
+ SPARK_LAUNCHER_CP="${LAUNCHER_DIR}/${LAUNCHER_JARS}"
+else
+ LAUNCHER_DIR="$SPARK_HOME/launcher/target/scala-$SPARK_SCALA_VERSION"
+ if [ ! -d "$LAUNCHER_DIR/classes" ]; then
+ echo "Failed to find Spark launcher classes in $LAUNCHER_DIR." 1>&2
+ echo "You need to build Spark before running this program." 1>&2
+ exit 1
fi
+ SPARK_LAUNCHER_CP="$LAUNCHER_DIR/classes"
fi
-export CLASSPATH
-# In Spark submit client mode, the driver is launched in the same JVM as
Spark submit itself.
-# Here we must parse the properties file for relevant "spark.driver.*"
configs before launching
-# the driver JVM itself. Instead of handling this complexity in Bash, we
launch a separate JVM
-# to prepare the launch environment of this driver JVM.
+# The launcher library will print arguments separated by a NULL character.
Read that in a while
+# loop, populating an array that will be used to exec the final command.
--- End diff --
can you add a quick sentence here to motivate why we're doing this, i.e. we
need a way to split user arguments in a way that escapes whitespace and special
characters correctly.
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