WebSphere Application Server V8.5.5

Last week at IMPACT in Las Vegas we announced WebSphere Applicaiton Server V8.5.5. While most of the changes were for Libery profile, there were quite a few changes to Base and ND editions as well.

The following are the most important changes for me:

  • Liberty profile now supports the complete Java EE Web Profile

  • Liberty profile is now also available as WAS Liberty Core - can be optionally used with a collective controller from WAS ND and is limited to only two load distributed servers.

  • Liberty collective controller is available on WAS ND or WAS for zOS

  • WebSphere eXtreme Scale is now also delivered as a part of WAS V8.5.5, although entitlements vary by edition. WAS ND includes full entitlements, but if you plan to use a remote data grid, you want to purchase XC10 or WXS.

A full list of capabilities and changes can be found in the announcement letter.

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IBM MessageSight

Last week at IMPACT in Las Vegas we announced IBM MessageSight, an appliance that can be placed in a DMZ that handles outbound & inbound messages at scale. While primarily useful for machine-to-machine (m2m) communication using MQTT it also handles WebSocket connections for web applications.

While there are quite a number of communication options an important concept to understand is that this appliance is not a queue manager or broker. It’s basically a messaging gateway that makes it possible to only connect a small number of devices to internal IT systems, but still gather or push messages to millions of devices. A full list of its key capabilities can be found in the announcement letter.

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Concurrent Mark Sweep GC

For analyzing the CMS collector of Oracle JVMs the posts by Jon Masamitsu about the Phases of CMS and its PrintGCDetails Output are very useful. I’d also recommend to look at the Java HotSpot Garbage Collection documentation, but I’ve not found it very comprehensive in the past and not as easy to use as our IBM Java Diagnostics Guide.

Also be aware that some of the behavior you’re seeing in verbose gc output might be because of the characteristics of the underlying platform. I’ve seen JVMs with large amounts of threads take a long time to be stopped by the collector on Solaris on Niagara boxes, so don’t assume different behavior between platforms is necessarily a defect in the GC itself.


WebSphere Application Server V8.5.Next Beta

An updated WebSphere Application Server V8.5.Next Beta is now available. The Liberty profile now includes a JMS messaging engine with support for MDBs, enhanced CDI support, federated LDAP registry support, the ability to act as an OAuth Service Provider, the ability to organize Liberty servers into collectives for clustering and administration, and more.

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Internally at IBM we use BlueGroups to manage permissions for various services. It’s basically just regular LDAP groups inside of a Tivoli Directory Server. We have a web UI for managing those groups. Unfortunately the definition of managing apparently doesn’t include finding the list of groups you’re a member of. For this you need some ldapsearch trickery.

First, find the dn for your user:

$ ldapsearch -x -h bluepages.ibm.com -b ou=bluepages,o=ibm.com "(mail=NAME@CC.ibm.com)" dn

Then use that dn to find the groups you’re a member of:

$ ldapsearch -x -h bluepages.ibm.com -b ou=memberList,ou=ibmgroups,o=ibm.com "(uniqueMember=uid=SSSSSSCCC,c=CC,ou=bluepages,o=ibm.com)" dn


Disaster Recovery

Reality check: Does your disaster recovery plan defy the laws of physics?

Sure, it's always a middleware problem.

Working as a middleware admin? Then you should really check out t-rob’s latest post. This post works for any middleware you’re working with, not only MQ :-)

A Scalable Application Placement Controller for Enterprise Data Centers

Want some more insight into the magic that goes on inside of WebSphere Application Server Network Deployment’s dynamic clusters? Then check out the paper about A Scalable Application Placement Controller for Enterprise Data Centers.



IBM United States Software Announcement 212-417:

IBM extends the end-of-service date for IBM WebSphere Application Server V6.1 from September 30, 2012, to September 30, 2013.


Project Jigsaw

Jigsaw will most likely be delayed again. This time until Java 9. The goals are ambitious, but given a first demo of this was shown at JavaOne three years ago, this is pretty disappointing. You can find the FAQ on Mark’s blog and join the discussion there or send your feedback directly to the Java SE 8 Comments List.