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From: Duncan Idaho <duncan@dunenoemail.com>
Newsgroups: comp.lang.java.programmer
Subject: Java 1.8 and CentOS
Date: Wed, 13 Apr 2016 15:04:13 +0100
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This is probably off topic but I'm running out of ideas

I have 2 systems

1. Ubuntu Linux 12.10
2. CentOS Linux release 7.2.1511

Each system has the following identical setup

/opt/apache-tomcat-7.0.42

/opt/jdk1.7.0_45
/opt/jdk1.8.0_77

/etc/rc.d/init.d/tomcat7

This script starts tomcat as a unix daemon using jsvc
The script is included at the end of this message FYI

At the start of the script I set the version.

JAVA_HOME=/opt/jdk1.7.0_45

I then type

/etc/rc.d/init.d/tomcat7 start

and tomcat runs like a top on both systems

I then change the script thusly

JAVA_HOME=/opt/jdk1.8.0_77

invoking the script on Ubuntu starts the server

invoking the script on CentOS results in the following error message

Cannot find any VM in Java Home /opt/jdk1.8.0_77
Cannot locate JVM library file

If I set up a systemd service on CentOS and start tomcat under java 1.7

# systemctl start tomcat.service

results in a running server

exactly the same service where the java version is 1.8 fails with the
same message

Cannot find any VM in Java Home /opt/jdk1.8.0_77
Cannot locate JVM library file

I believe this message is coming from jsvc but cannot for the life of
me figure out why this is going wrong.

on CentOS

[root@vps logs]# java -version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

[root@vps logs]# echo $PATH
/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/lyallex/.local/bin:/home/lyallex/bin:/opt/jdk1.8.0_77/bin

So the vm is there on the path.

Does anyone have any idea how to fix this as for various reasons I need 
to get the server running on CentOS against Java 1.8

thanks
Duncan




==============================/etc/rc.d/init.d/tomcat7
============================
# chkconfig: - 71 19
# description:  Start up the Tomcat servlet engine.
# use java 7
# JAVA_HOME=/opt/jdk1.7.0_45
# java 8, works on Ubuntu, fails on CentOS
JAVA_HOME=/opt/jdk1.8.0_77
CATALINA_HOME=/opt/apache-tomcat-7.0.42
export JAVA_HOME CATALINA_HOME
CLASSPATH=$CATALINA_HOME/bin/bootstrap.jar:$CATALINA_HOME/bin/commons-daemon.jar:$JAVA_HOME/lib/tools.jar:$CATALINA_HOME/bin/tomcat-juli.jar
TOMCAT_USER=tomcat
TMPDIR=/var/tmp
PIDFILE=/var/run/tc7/jsvc.pid


RC=0

case "$1" in

   start)

    $CATALINA_HOME/bin/jsvc -user $TOMCAT_USER -home $JAVA_HOME
-Dcatalina.home=/opt/apache-tomcat-7.0.42
-Dcatalina.base=$CATALINA_HOME -Djava.io.tmpdir=$TMPDIR
-Djava.awt.headless=true \
      -Xms512m \
      -Xmx1024m \
      -outfile $CATALINA_HOME/logs/catalina.out \
      -errfile $CATALINA_HOME/logs/catalina.err \
      -pidfile '/var/run/tc7/jsvc.pid' \
      -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager \
 
-Djava.util.logging.config.file=$CATALINA_HOME/conf/logging.properties \
      -cp $CLASSPATH  \
      org.apache.catalina.startup.Bootstrap

     RC=$?

     [ $RC = 0 ] && touch /var/tc7lock/subsys/tomcat
     echo "starting tomcat7 on darkstar with:"
     echo "JAVA_HOME=$JAVA_HOME"
     echo "CATALINA_HOME=$CATALINA_HOME"
     echo "CLASSPATH=$CLASSPATH"
     echo "tomcat started"
     ;;

   stop)

     PID=`cat /var/run/tc7/jsvc.pid`
     kill $PID

    RC=$?

     [ $RC = 0 ] && rm -f /var/tc7lock/subsys/tomcat /var/run/tc7/jsvc.pid
     echo "stopping tomcat7 on darkstar with:"
     echo "JAVA_HOME=$JAVA_HOME"
     echo "CATALINA_HOME=$CATALINA_HOME"
     echo "CLASSPATH=$CLASSPATH"

     echo "tomcat stopped"
     ;;

   *)
         echo "Usage: $0 {start|stop}"
         exit 1
esac
exit $RC

[root@vps logs]#



-- 
Duncan Idaho