CDM Server Installation

The CDM Server can be installed on Linux (Debian and derivates, incuding Ubuntu, Mint) , Mac OS X and of course on Windows. For detailed information on the requirements please refer to CDM Server Requirements. For each CDM database a separate CDM remote web application instance will be launched which will require a significant amount of memory. The CDM server listens per default on port 8080 but can be configured to use another port. Installer packages for the CDM Server are provided in the download section as Debian package and as an executable Windows installer application.

In the following the steps required to install and set up a CDM Server are described for Debian Linux and for Windows XP. Intallation on newer Windows systems has not been tested so far but should be possible. Where necessary the platform dependant steps are described for each operation system individually.

In the following it is assumed that the CDM Server installation is available from this URL: (http://cdmserver.test/). NOTE that this is a fake URL! The actual base URL of your cdm-server is different and depends on your specific setup.

1. Check CDM Server Requirements

Read the CDM Server Requirements document and make sure that your environment meets the mentioned hardware and software requirements of CDM Server. Install any additional software needed before downloading the CDM Server.

2. Download


Download the latest stable release of the Debian package (cdmserver_x.x.x.-5_all.deb) from the download site.


Download the latest stable release of the Windows installer executable (EDIT CDM-Server-x.x.exe) from the download site.

3. Installation

The automated installation of the CDM Server configures the server per default to listen on port 8080. If you already have another service using this port you have to change the configuration (see step 3 below) in order to allow the server to startup.


First of all you need to install an additional package:

sudo apt-get install jsvc

Go to the directory to where you downloaded the Debian package and install it by executing:

dpkg -i cdmserver_x.x.x.-5_all.deb

The resulting output on the terminal should look like the following:

Selecting previously deselected package cdmserver.
(Reading database ... 31748 files and directories currently installed.)
Unpacking cdmserver (from ../cdmserver_0.0.1-1_amd64.deb) ...
Setting up cdmserver (0.0.1-1) ...
 Adding system startup for /etc/init.d/cdmserver ...
   /etc/rc0.d/K02cdmserver -> ../init.d/cdmserver
   /etc/rc1.d/K02cdmserver -> ../init.d/cdmserver
   /etc/rc6.d/K02cdmserver -> ../init.d/cdmserver
   /etc/rc2.d/S98cdmserver -> ../init.d/cdmserver
   /etc/rc3.d/S98cdmserver -> ../init.d/cdmserver
   /etc/rc4.d/S98cdmserver -> ../init.d/cdmserver
   /etc/rc5.d/S98cdmserver -> ../init.d/cdmserver 
Starting CDM Server: cdmserver with -Xmx1024M -jar /opt/cdmserver//cdmserver-standalone.jar --httpPort=8080 
--ajp13Port=-1 --logfile=/var/log/cdmserver/cdmserver.log

The CDM Server has now been installed on /opt/cdmserver. An according "init"-script has been created at /etc/init.d/cdmserver. Finally the server has been started.

The CDM Server configuration files are located in


The CDM server can now run with this configuration, but you may want to do further configuration to assign it enough memory and for best performance. Therefore we highly recommend installing the latest Oracle JDK 1.8 and to configure the CDM Server accordingly. Debian and Ubuntu are not including the oracle jdk in the packages so you have to install it manually. After installing the oracle jdk 1.8 you have to create the following file: /etc/defaults/cdmserver


If your CdmServer serves more than 4 instances, you have to increase the -Xmx parameter.



# CONTEXT_PATH_PREFIX per default is set to / in the cdmserver init script
# enable the below line to override this variable

# The JAVA_HOME variable
# must point to the location of the jdk you want to run the CDM Server with

# determine the number of processors available in the system

### jvm memory configuration
# -----------------------------
# jvm settings for jdk 1.7:
#JAVA_OPTIONS="-Xmx1024M -XX:PermSize=128m -XX:MaxPermSize=512m -XX:+UseG1GC -XX:ParallelGCThreads=${CPU_CORES} -XX:ConcGCThreads=${CPU_CORES} -Duser.home=$CDM_HOME"
# -----------------------------
# jvm settings for jdk 1.8
JAVA_OPTIONS="-Xmx1024M -XX:+UseG1GC -XX:ParallelGCThreads=${CPU_CORES} -XX:ConcGCThreads=${CPU_CORES} -Duser.home=$CDM_HOME"


Execute the downloaded installer (EDIT CDM-Server-x.x.exe) and follow the instructions. The CDM Server will be installed as windows service and is being started after prior installation steps have completed.

By default the installer will install the CDM server into the folder "%PROGRAMFILES%/EDIT CDM-Server/" folder. %PROGRAMFILES% usually is "C:\Program Files\" on Windows systems with english localization.

The CDM Server configuration files are found in

%PROGRAMFILES%/EDIT CDM-Server/.cdmLibrary

4. Configuration

During the previous step the CDM Server has been installed.

Now navigate with your web browser to the CDM Server root ( Access to this page is restricted, thus you are being presented a sign-in box. Unless you change the credentials which are defined in .cdmLibrary/ file the CDM Server will use the default.


Default credentials:

  • user: admin
  • password: edit

For security reasons it is highly recommended that you change the credentials as soon as possible. If you have problems locating the .cdmLibrary/ file please refer to 3. Installation.  The respective file is a java properties file defining the users, passwords and roles for a Jetty-HashUserRealm (please refer to as reference).

After successful login, you should see an administrative overview on the CDM Server like shown in the image below. This page will report an error since the server has been installed without connecting it to an existing CDM database:



Create the cdm data base

Now it is time to create a data base in your mysql server. You may want to choose a data base name which matches your project name, like for example "cdm_plantae":

echo "create database cdm_plantae;" | mysql -uroot -p

It is highly recommended that you create a mysql user which has grants for this database. Using the root user in the cdm-server configuration is discouraged!


In the next step we will configure the cdm-server to use this database.

Configure the cdm data base

Open the data sources configurations file .cdmLibrary/datasources.xml with your favorite text editor. For the exact location of the .cdmLibrary folder see above.

Edit the data source bean settings:

<bean id="cdm_plantae"  lazy-init="true" class="com.mchange.v2.c3p0.ComboPooledDataSource">
      <property name="driverClass" value="com.mysql.jdbc.Driver"/>
      <property name="user" value="cdm_user"/>
      <property name="password" value="my-super-secret-database-password"/>
      <property name="jdbcUrl" value="jdbc:mysql://" />
  • jdbcUrl: this mysql connect URL must point to a data base on your mysql server
  • id: This defines the name of the data base instance under which the server will serve it. In the example above it has been changed from the default "myCDMServerInstance1" to "cdm_plantae".
  • driverClass: MUST NOT BE CHANGED!
  • name: The login name of a mysql user, which is granted to access the data base.
  • password: The users password.

You can define multiple data source beans in the datasources.xml file. Hence, you can configure the server to expose multiple databases at once. For each CDM database a separate CDM remote web application instance will be launched which will require a significant amount of memory (see CDM Server Requirements for more information).
The bean id will be used as name of the specific web application instance and specifies the base path at which the according webservices are available. This path is shown in the administrative overview of the CDM Server ( 

Restart the cdm-server

Once you configured your database restart the CDM Server:

  • Linux: Execute the following command in your terminal:
    systemctl restart cdmserver.service
    service /etc/init.d/cdmserver restart


    /etc/init.d/cdmserver restart
  • Windows: Go to the CDM Server application folder and execte the stop and start batch files in %PROGRAMFILES%/EDIT CDM-Server/:
    1. stop-service.bat
    2. start-service.bat

Test your configuration by navigating with your web browser to the CDM Server root ( Now the CDM Server should list the newly configured data source. The status row should indicate the status "started". The status indicator shows "initializing", if the startup process is not yet finished, and should turn to "started" after some time. This may take several minutes, so please be patient.

The URL to the server instance is our example case is

You can get hold of this URL directly from the CDM Server management console by doing a right click on the link in the "Path" column, and choosing "Copy Link Localion" or whatever suits to you browser.


Advanced Configuration

The CDM Server can be started with different commandline options with are listed in the following. In order to apply these options to a CDM Server running as service you have to edit different configuration files on each platform:


Edit /etc/init.d/cdmserver and restart the server:

/etc/init.d/cdmserver restart


Edit %PROGRAMFILES%\EDIT CDM-Server\etc\CDMServer.conf and reinstall the serverbatch by executing the following batch files in %PROGRAMFILES%/EDIT CDM-Server/:

  1. remove-service.bat
  2. install-service.bat
  3. start-service.bat

Command Line Options

-datasources    use the specified datasources file.
                                  Default is
 -help                            print this message
 -httpPort        set the http listening port. Default is
 -jmx                             Start the server with the Jetty MBeans
                                  in JMX Management mode.
                                  For testing you can use the following
                                  jvm options:
 -webapp                    use the specified webapplication this
                                  either can be a compressed war or
                                  extracted file. If this option is used
                                  extraction of the war from the cdmserver
                                  jar file is omitted.Using the following
                                  paths developers can run the server
                                  completely from the target folder or
                                  completely from source:
 -win32service                    ONLY USED INTERNALLY - prepare for
                                  running as win32 service, the server
                                  will not be started automatically!

Running the cdm-server behind a reverse-proxy

If you need to run the cdm-server at port 80 or 443 you can configure the http server to act as reverse proxy for the cdm-server.

Configuring apache as reverse proxy:

Add the following to the virtual host configuration:

# NOTE: AllowEncodedSlashes is off per default to prevent possible security vulnerabilities.
#       To allow the cdmserver resolving http identifiers via HTTP GET requests it is required to
#       allow encoded slashes. See  
AllowEncodedSlashes NoDecode

# Reverse Proxie
<Location /cdmserver/>
  # lets the  cdmserver run at port 80 for public access
  ProxyPass nocanon

Also make sure mod_proxy is enabled:

a2enmod proxy


Below commands document the steps required to update a cdmserver. It is highly recommended to make a backup of the cdm database prior installing the new cdmserver version.

export VERSION='5.24.0'
export URL="$VERSION/cdmserver_$VERSION-5_all.deb"
rm -f cdmserver_$VERSION-5_all.deb
curl -s -o cdmserver_$VERSION-5_all.deb -O $URL
sudo dpkg -i cdmserver_$VERSION-5_all.deb




For removing the cdm package just execute

dpkg -r cdmserver


Execute the uninstaller executable %PROGRAMFILES%/EDIT CDM-Server/uninstall.exe and follow the instructions.


Trouble shooting

Host 'xxx' is not allowed to connect to this MySQL server"[HY000]

You get an error in the cdm-server log or in the managemnent console, like:

01:11:57.442 [] [main] ERROR e.e.cdm.server.instance.CdmInstance - cdm_plantae : 
cdmuser@jdbc:mysql:// has problem : null,  message from 
server: "Host '' is not allowed to connect to this MySQL server"[HY000]

There are two means to solve this.

A) The Mysql database and and CDM-Server are installed on the same logical machine (same IP address)

Just use jdbc:mysql://localhost/cdm_mexu as jdbcUrl in the datasources.xml

B) Mysql Server and cdm-server are running under different IP addresses:


  • mysql server:
  • cdm-server:

Please issue the following command to the mysql server. Replace by the ip-address of the server where the cdm-server is running!


Afterwards, you may want to test if connecting the mysql server from the machine where the cdm-server is running.

mysql -u cdmuser -p -h cdm_plantae