MAPREDUCE-3081. Fix vaidya startup script. Contributed by Suhas

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1176563 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -1,5 +1,7 @@
 Hadoop MapReduce Change Log
 
+    MAPREDUCE-3081. Fix vaidya startup script. (gkesavan via suhas).
+
 Release 0.23.0 - Unreleased
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/src/contrib/vaidya/src/java/org/apache/hadoop/vaidya/vaidya.sh

@@ -31,17 +31,78 @@ script=`basename "$this"`
 bin=`cd "$bin"; pwd`
 this="$bin/$script"
 
-# Check if HADOOP_PREFIX AND JAVA_HOME is set.
-if [ -z $HADOOP_PREFIX ] ; then
-  echo "HADOOP_PREFIX environment variable not defined"
+# Check if HADOOP_HOME AND JAVA_HOME is set.
+if [ -z "$HADOOP_HOME" ] && [ -z "$HADOOP_PREFIX" ] ; then
+  echo "HADOOP_HOME or HADOOP_PREFIX environment variable should be defined"
   exit -1;
 fi
 
-if [ -z $JAVA_HOME ] ; then
+if [ -z "$JAVA_HOME" ] ; then
   echo "JAVA_HOME environment variable not defined"
   exit -1;
 fi
 
-hadoopVersion=`$HADOOP_PREFIX/bin/hadoop version | grep Hadoop | awk '{print $2}'`
+if [ -z "$HADOOP_PREFIX" ]; then
+  hadoopVersion=`$HADOOP_HOME/bin/hadoop version | awk 'BEGIN { RS = "" ; FS = "\n" } ; { print $1 }' | awk '{print $2}'`
+else
+  hadoopVersion=`$HADOOP_PREFIX/bin/hadoop version | awk 'BEGIN { RS = "" ; FS = "\n" } ; { print $1 }' | awk '{print $2}'`
+fi
 
-$JAVA_HOME/bin/java -Xmx1024m -classpath $HADOOP_PREFIX/hadoop-${hadoopVersion}-core.jar:$HADOOP_PREFIX/contrib/vaidya/hadoop-${hadoopVersion}-vaidya.jar:$HADOOP_PREFIX/lib/commons-logging-1.0.4.jar:${CLASSPATH} org.apache.hadoop.vaidya.postexdiagnosis.PostExPerformanceDiagnoser $@
+# so that filenames w/ spaces are handled correctly in loops below
+IFS=
+
+# for releases, add core hadoop jar to CLASSPATH
+if [ -e $HADOOP_PREFIX/share/hadoop/hadoop-core-* ]; then
+  for f in $HADOOP_PREFIX/share/hadoop/hadoop-core-*.jar; do
+    CLASSPATH=${CLASSPATH}:$f;
+  done
+
+  # add libs to CLASSPATH
+  for f in $HADOOP_PREFIX/share/hadoop/lib/*.jar; do
+    CLASSPATH=${CLASSPATH}:$f;
+  done
+else
+  # tarball layout
+  if [ -e $HADOOP_HOME/hadoop-core-* ]; then
+    for f in $HADOOP_HOME/hadoop-core-*.jar; do
+      CLASSPATH=${CLASSPATH}:$f;
+    done
+  fi
+  if [ -e $HADOOP_HOME/build/hadoop-core-* ]; then 
+    for f in $HADOOP_HOME/build/hadoop-core-*.jar; do
+      CLASSPATH=${CLASSPATH}:$f;
+    done
+  fi
+  for f in $HADOOP_HOME/lib/*.jar; do
+    CLASSPATH=${CLASSPATH}:$f;
+  done
+
+  if [ -d "$HADOOP_HOME/build/ivy/lib/Hadoop/common" ]; then
+    for f in $HADOOP_HOME/build/ivy/lib/Hadoop/common/*.jar; do
+      CLASSPATH=${CLASSPATH}:$f;
+    done
+  fi
+fi
+
+# Set the Vaidya home
+if [ -d "$HADOOP_PREFIX/share/hadoop/contrib/vaidya/" ]; then
+  VAIDYA_HOME=$HADOOP_PREFIX/share/hadoop/contrib/vaidya/
+fi
+if [ -d "$HADOOP_HOME/contrib/vaidya" ]; then
+  VAIDYA_HOME=$HADOOP_HOME/contrib/vaidya/
+fi
+if [ -d "$HADOOP_HOME/build/contrib/vaidya" ]; then
+  VAIDYA_HOME=$HADOOP_HOME/build/contrib/vaidya/
+fi
+
+# add user-specified CLASSPATH last
+if [ "$HADOOP_USER_CLASSPATH_FIRST" = "" ] && [ "$HADOOP_CLASSPATH" != "" ]; then
+  CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}
+fi
+
+# restore ordinary behaviour
+unset IFS
+
+echo "$CLASSPATH"
+
+$JAVA_HOME/bin/java -Xmx1024m -classpath $VAIDYA_HOME/hadoop-vaidya-${hadoopVersion}.jar:${CLASSPATH} org.apache.hadoop.vaidya.postexdiagnosis.PostExPerformanceDiagnoser $@