azkaban-aplcache

diff --git a/azkaban-exec-server/src/main/bash/azkaban-executor-start.sh b/azkaban-exec-server/src/main/bash/azkaban-executor-start.sh
index 54ccdb2..510373e 100755
--- a/azkaban-exec-server/src/main/bash/azkaban-executor-start.sh
+++ b/azkaban-exec-server/src/main/bash/azkaban-executor-start.sh
@@ -45,7 +45,7 @@ executorport=`cat $conf/azkaban.properties | grep executor.port | cut -d = -f 2`
 echo "Starting AzkabanExecutorServer on port $executorport ..."
 serverpath=`pwd`
 
-if [ -z $AZKABAN_OPTS ]; then
+if [[ -z "$AZKABAN_OPTS" ]]; then
   AZKABAN_OPTS="-Xmx3G"
 fi
 # Set the log4j configuration file

diff --git a/azkaban-web-server/src/main/bash/azkaban-web-start.sh b/azkaban-web-server/src/main/bash/azkaban-web-start.sh
index 9911365..7c568e9 100755
--- a/azkaban-web-server/src/main/bash/azkaban-web-start.sh
+++ b/azkaban-web-server/src/main/bash/azkaban-web-start.sh
@@ -44,7 +44,7 @@ echo $CLASSPATH;
 executorport=`cat $conf/azkaban.properties | grep executor.port | cut -d = -f 2`
 serverpath=`pwd`
 
-if [ -z $AZKABAN_OPTS ]; then
+if [[ -z "$AZKABAN_OPTS" ]]; then
   AZKABAN_OPTS="-Xmx4G"
 fi
 # Set the log4j configuration file