diff --git a/vjdump/vjdump.sh b/vjdump/vjdump.sh
index 22dbc9a2..5a0f8a06 100755
--- a/vjdump/vjdump.sh
+++ b/vjdump/vjdump.sh
@@ -39,19 +39,12 @@ START()
   fi
 
   # try to find $JAVA_HOME if not set
-  if [[ -z ${JAVA_HOME} || ! -d ${JAVA_HOME} ]]; then
-      JAVA_HOME_CANDIDATES=$(ps aux \
-                                | grep java \
-                                | awk '{print $11}' \
-                                | sed -n 's/\/bin\/java$//p')
-      for JAVA_HOME_TEMP in ${JAVA_HOME_CANDIDATES[@]}; do
-          if [ -f ${JAVA_HOME_TEMP}/lib/tools.jar ]; then
-              JAVA_HOME=${JAVA_HOME_TEMP}
-              break
-          fi
-      done
+  if [ -z "$JAVA_HOME" ] ; then
+      JAVA_HOME=`readlink -f \`which java 2>/dev/null\` 2>/dev/null | \
+      sed 's/\jre\/bin\/java//' | sed 's/\/bin\/java//'`
   fi
-  if [ -z ${JAVA_HOME} ]; then
+
+  if [ ! -f "$JAVA_HOME/bin/jstack" ] ; then
       echo -e "\033[31m\$JAVA_HOME not found. please export JAVA_HOME manually.\033[0m"
       exit -1
   fi
@@ -70,8 +63,7 @@ START()
   JSTACK_LOG=${LOGDIR}/jstack-${PID}-${DATE}.log
   ${JAVA_HOME}/bin/jstack -l $PID > ${JSTACK_LOG}
   if [[ $? != 0 ]]; then
-    echo -e "\033[31mprocess jstack error, now exit.\033[0m"
-    exit -1
+    echo -e "\033[31mprocess jstack error.\033[0m"
   fi
   echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jstack."
   sleep ${SLEEP_TIME}
@@ -86,8 +78,7 @@ START()
     VJTOP_LOG=${LOGDIR}/vjtop-${PID}-${DATE}.log
     $VJTOP_SCRIPT -n 1 -d $VJTOP_DURATION $PID > ${VJTOP_LOG}
     if [[ $? != 0 ]]; then
-      echo -e "\033[31mprocess vjtop error, now exit.\033[0m"
-      exit -1
+      echo -e "\033[31mprocess vjtop error.\033[0m"
     fi
     echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process vjtop."
   else
@@ -97,8 +88,7 @@ START()
     JINFO_FLAGS_LOG=${LOGDIR}/jinfo-flags-${PID}-${DATE}.log
     ${JAVA_HOME}/bin/jinfo -flags $PID 1>${JINFO_FLAGS_LOG} 2>&1
     if [[ $? != 0 ]]; then
-      echo -e "\033[31mprocess jinfo -flags error, now exit.\033[0m"
-      exit -1
+      echo -e "\033[31mprocess jinfo -flags error.\033[0m"
     fi
     echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jinfo -flags."
   
@@ -107,8 +97,7 @@ START()
     JMAP_HEAP_LOG=${LOGDIR}/jmap_heap-${PID}-${DATE}.log
     ${JAVA_HOME}/bin/jmap -heap $PID > ${JMAP_HEAP_LOG}
     if [[ $? != 0 ]]; then
-      echo -e "\033[31mprocess jmap -heap error, now exit.\033[0m"
-      exit -1
+      echo -e "\033[31mprocess jmap -heap error.\033[0m"
     fi
     echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jmap -heap."
   fi
@@ -118,8 +107,7 @@ START()
   JMAP_HISTO_LOG=${LOGDIR}/jmap_histo-${PID}-${DATE}.log
   ${JAVA_HOME}/bin/jmap -histo $PID > ${JMAP_HISTO_LOG}
   if [[ $? != 0 ]]; then
-    echo -e "\033[31mprocess jmap -histo error, now exit.\033[0m"
-    exit -1
+    echo -e "\033[31mprocess jmap -histo error.\033[0m"
   fi
   echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jmap -histo."
   sleep ${SLEEP_TIME}
@@ -129,8 +117,7 @@ START()
   JMAP_HISTO_LIVE_LOG=${LOGDIR}/jmap_histo_live-${PID}-${DATE}.log
   ${JAVA_HOME}/bin/jmap -histo:live $PID > ${JMAP_HISTO_LIVE_LOG}
   if [[ $? != 0 ]]; then
-    echo -e "\033[31mprocess jmap -histo:live error, now exit.\033[0m"
-    exit -1
+    echo -e "\033[31mprocess jmap -histo:live error.\033[0m"
   fi
   echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jmap -histo:live."
   sleep ${SLEEP_TIME}
@@ -141,8 +128,7 @@ START()
     echo -e "$(date '+%Y-%m-%d %H:%M:%S') Begin to process jmap -dump:live."
     ${JAVA_HOME}/bin/jmap -dump:live,format=b,file=${JMAP_DUMP_FILE} $PID
     if [[ $? != 0 ]]; then
-      echo -e "\033[31mprocess jmap -dump:live error, now exit.\033[0m"
-      exit -1
+      echo -e "\033[31mprocess jmap -dump:live error.\033[0m"
     fi
     echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process jmap -dump:live."
      
@@ -159,8 +145,7 @@ START()
     # "\cp" means unalias cp, it can cover files without prompting
     \cp -rf $GCLOG ${LOGDIR}/
     if [[ $? != 0 ]]; then
-      echo -e "copy gc log error, now exit."
-      exit -1
+      echo -e "copy gc log error."
     fi
   fi
   echo -e "$(date '+%Y-%m-%d %H:%M:%S') Finish to process gc log."
@@ -174,8 +159,7 @@ START()
     ZIP_FILE=${BASEDIR}/vjdump-${PID}-${DATE}.zip
     zip -j ${ZIP_FILE} ${LOGDIR}/*.log
     if [[ $? != 0 ]]; then
-      echo -e "\033[31mzip files error, exit.\033[0m"
-      exit -1
+      echo -e "\033[31mzip files error.\033[0m"
     else
       echo -e "zip files success, the zip file is \033[34m${ZIP_FILE}\033[0m"
     fi
@@ -187,8 +171,7 @@ START()
       ZIP_FILE_WITH_HEAP_DUMP=${BASEDIR}/vjdump-with-heap-${PID}-${DATE}.zip
       zip -j ${ZIP_FILE_WITH_HEAP_DUMP} ${LOGDIR}/*.log ${JMAP_DUMP_FILE}
       if [[ $? != 0 ]]; then
-        echo -e "\033[31mzip files which include dump file error, exit.\033[0m"
-        exit -1
+        echo -e "\033[31mzip files which include dump file error.\033[0m"
       else
         echo -e "zip files which include dump file success, the zip path is \033[34m${ZIP_FILE_WITH_HEAP_DUMP}\033[0m"
       fi