Perlito5 - java - Spark wip

misc/Spark/README.md

@@ -1,6 +1,20 @@
 Perlito + Spark
 ===============
 
+Install or select Java 8
+--------------
+
+Spark requires Java 8
+
+If you have previously compiled Perlito for a newer Java, you should probably
+recompile for Java 8:
+
+    cd Perlito      # Perlito source code directory
+    make clean
+    make
+    make test-5jar
+
+
 Download and start Spark
 --------------
 
@@ -10,6 +24,7 @@ get Spark from https://spark.apache.org/downloads.html
 tar -xzvf spark-2.4.4-bin-hadoop2.7.tgz
 
 export SPARK_HOME=spark-2.4.4-bin-hadoop2.7
+export CLASSPATH=.:spark-2.4.4-bin-hadoop2.7/jars/*
 
 $SPARK_HOME/sbin/start-master.sh
 ```
@@ -40,7 +55,6 @@ perl -c -I src5/lib/Perlito5X/Java misc/Spark/spark.pl
 run:
 
 ```
-export CLASSPATH=.:spark-2.4.4-bin-hadoop2.7/jars/*
 
 java org.perlito.Perlito5.Main -I src5/lib misc/Spark/spark.pl 3
 ```