java




Launching Java Apps

Windows

cd C:\Program Files (x86)\Java\jre1.8.xx\bin
keytool -keystore ..\lib\security\cacerts -import -alias site.fqdn.com -file server.txt

edit C:\Program Files (x86)\Java\jre1.8.0_xx\lib\security\java.policy
permission java.net.SocketPermission "*.site.fqdn.com:443", "connect,resolve";

open java or configure java in the start menu
Click on Security Tab
Select Security Level: High
Add https://site.fqdn.com to exceptions list at the bottom

Configure Linux as root

cd /usr/java/jdk1.7.?_??/jre/lib/security (for Ubuntu this may be in /opt/java/64/jre1.7.0_07/lib/security/ )
sudo curl -O https://site.fqdn.com/server.txt
keytool -keystore ./cacerts -import -alias site.fqdn.com -file server.txt

Configure OS X

cd /Library/Java/Home/lib/security (alternatively /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/security/)
sudo curl -O https://site.fqdn.com/server.txt
keytool -keystore ./cacerts -import -alias site.fqdn.com -file server.txt


thread dump / heap dump


set -x
HOST=`hostname | sed 's/\..*//'`
export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
APP_LOGS=/logs/tomcat/
TIMESTAMP=`date +%s`
APP_LOG_DIR=$APP_LOGS/$TIMESTAMP
mkdir $APP_LOG_DIR
echo $APP_LOG_DIR
cd /usr/java/default/
PID=`ps -ef | grep java | grep -i -- 'org.apache.catalina.startup.Bootstrap' | grep -v grep | awk '{print $2}'`
jstack -l $PID > $APP_LOG_DIR/threaddump.txt
jmap -heap $PID > $APP_LOG_DIR/heapsummary.txt
jmap -histo $PID > $APP_LOG_DIR/histogram.txt
cd $APP_LOG_DIR
jmap -dump:live,format=b,file=heap.bin $PID
netstat -an > $APP_LOG_DIR/netstat.txt
/usr/sbin/lsof -p $PID > $APP_LOG_DIR/lsof.txt



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