Running Geronimo on Harmony
This article has the following structure:
- #General note
- #Unresolved issues
- #Geronimo configuration
- #Harmony configuration
This article was written using the following environment:
Geronimo v2.1 Jetty full J2EE version (
Harmony snapshot r617157 (Jan 31 2008), Windows/ia32/msvc 1310, debug build
Microsoft Windows XP Professional Service Pack 2, 32-bit, English
With other versions and in a different environment, the behavior may differ.
Here's the brief summary of all the unresolved issues that require attention:
- HARMONY-5523 – Geronimo Console displays memory usage information incorrectly (investigated, not critical).
- Application fails to terminate properly – pressing
Ctrl-Cstarts shutdown process that is never finished (uninvestigated).
It's recommended that you backup your
var/config/config.xml file before editing it – you may need the original file if you want to run your Geronimo installation on Sun Java or if you make a mistake while editing and damage the file beyond repair.
Configure the server to use Harmony RMI Registry provider for JNDI
Harmony places JNDI providers in
org.apache.harmony.jndi package tree, not in
com.sun.jndi like Sun Java does, so you have to point Geronimo into the right direction to locate and properly access the RMI Registry provider.
For that, edit
var/config/config.xml file, adjust NamingProperties GBean configuration as follows:
Use TLS instead of SSL
Change default keystore type
Geronimo uses a JKS keystore that Harmony doesn't support, see GERONIMO-3757 for details. So you have to generate another keystore, of PKCS12, BKS (default for Harmony), or another type Harmony has support for, and to instruct Geronimo to use it.
To convert the existing Geronimo JKS keystore to PKCS12 type, you could use a simple Java program like JKStoPKCS12.java. The program needs to be run on Sun Java, as it supports both JKS and PKCS12 keystores. If you need a BKS keystore, you'd need to convert your PKCS12 keystore again, with PKCS12toBKS.java running on Harmony – as Sun Java doesn't support BKS and Harmony doesn't support JKS.
To instruct Geronimo to use alternate keystore, copy your keystore file to
var/security/keystores/ directory and add the following to
Alternatively, you may just overwrite you keystore file over the
var/security/keystores/geronimo-default, then you may omit the
keystorePath tag in the config. However, this is not recommended, as you may need the original keystore if you need to run your Geronimo installation on Sun Java. If you decide to overwrite, don't forget to backup your original keystore. Just in case you have no backup and need the original keystore, you may use the one attached to this article, just in case: geronimo.jks.
Customize the server startup
You may either edit the Geronimo startup scripts or run the server from the command line, but in either case you should consider the following adjustments:
1. Harmony doesn't accept the
-javaagent option (HARMONY-5462), so you have to omit it. Or, you may remove
bin/jpa.jar file from Geronimo distribution – this way the
-javaagent option would be omitted by the Geronimo startup script.
2. Geronimo v2.1 needs access to Internet for applications like SPECjAppServer2004 to be deployed – it tries to fetch XML schemas from http://java.sun.com site. So if you're going to deploy applications like that, and you're behind a firewall, you should add the appropriate
-Dhttp.proxyPort= options to the Geronimo command line. This problem is caused by OPENEJB-700 bug and should disappear after that bug is fixed and the fix is propagated to a new version of Geronimo.
3. SPECjAppServer2004 and other applications may require additional specification of JNDI naming conventions for EJB, like this:
4. Harmony generally needs more memory. So make sure to add the corresponding
Your final startup line may look like this:
Configure Deployer to use Harmony RMI Registry provider for JNDI
Harmony also supports IBM J9 VM, but Geronimo doesn't work with it, as Geronimo relies on
java.util.concurrent package that requires a proper implementation of
sun.misc.Unsafe class that is missing in IBM J9 VM.