DevOps NY

Tag: java

  • WMI and JMX with Icinga

    Over the past week I have been flexing my monitoring skills again. Of course the landscape has changed since I worked on this a few years ago. Today, I am struggling with a commercial product, unnamed. Bloated, expensive, horrible GUI, and time consuming. I am sure it is a good product given that you have an entire staff dedicated to managing it.

    So, I went back to my roots and set up an Icinga instance. I have it fully working on a Linux box monitoring Windows hosts. Agentless. No more nsclient installs. I am using check_wmi_plus plugin for everything Windows. You can supply a wmi query string to the plugin for anything WMI. Here are some URLs:

    https://wiki.icinga.org/display/howtos/check_wmi_plus

    some service definitions:

    http://www.edcint.co.nz/checkwmiplus/?q=nagiosservicedefinitions

    I am also monitoring out Java infrastructure. You need to make sure the java app is set up for remote jmx monitoring before this will work.

    http://exchange.nagios.org/directory/Plugins/Java-Applications-and-Servers/check_jmx/details

    and some nice service defs and commands:

    https://kb.op5.com/display/HOWTOs/Jboss+Monitoring+with+check_jmx

    Maybe I will get some time to write up a comprehensive faq.

  • Java on Ubuntu 13.04 (Raring Ringtail)

    Installing Oracle Java on Ubuntu can be a pretty daunting task. After reading the Ubuntu documentation here:

    Java

    I came across this nice github project:

    oab-java6

    Simply run

    git clone https://github.com/flexiondotorg/oab-java6.git

    Then cd into oab-java6 and run

    sudo ./oab-java.sh

    This will set up a local apt repository for Sun Java 6 and Oracle Java 7. Now run

    sudo apt-get update

    to add the packages from the repository. As the documentation states, you can now run

    sudo apt-get install sun-java6-jre

    To install Java 6 runtime environment.

    One small thing to note:

    I had to run

    sudo update-alternatives --config java

    and select the Sun JRE since the system defaulted to IcedTea.

    Now do

    java -version

    to see what you have!

  • MySQL Connectivity Issues with Spoon 4.4.1

    I recently installed Pentaho DI 4.4.1. I was previously using PDI 3.2. Transferring my ETL’s to the new PDI installation resulted in this error message (truncated).

    Error connecting to database [mysql] : org.pentaho.di.core.exception.KettleDatabaseException: 
Error occured while trying to connect to the database 

Exception while loading class 
org.gjt.mm.mysql.Driver

    Digging around, the full error can be found here:

    Exception while loading class mysql.Driver

    The answer is provided in the Jira ticket. You need to download and install the MySQL JDBC connector which can be found here:

    Download Connector/J

    I am using the Windows x64 version so I had to place the jar file here: C:\Program Files\pentaho\design-tools\data-integration\libext

    Now I am able to connect to MySQL.

    According to Pentaho, they can no longer include the MySQL JDBC connector as it is not compatible with the Apache 4.3 license.