The Java Application Isolation API

JSR-121 Interest Site

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This web page contains extra resources related to the JSR-121 effort and is intended to support general interest and informal activities and communication.[1]


Ciaran Bryce has written "Isolates: A New Approach to Multi-Programming in Java Platforms", providing a nice overview of isolation and related topics.[2] This article is the best starting point for newcomers.


JSR-121 version 1 is final and the expert group is being led by Krzysztof Palacz. The specification can be downloaded from here and additional details are available from the email interest list described below.

The long awaited resource management API to go along with isolates is now in preparation as JSR-284, also led by Grzegorz Czajkowski. More details are available here. Additional questions should probably be directed to the isolate interest email list described below until something is set up for this JSR.



There is an email list open to anyone and this list is archived.


Here is a bibliography of references related to JSR-121.


JSR-121 has involved a lot of work by a lot of people.  There are lists at the end of the JSR-121 presentation slides in the bibliography and another in the public review draft HTML.

[1]Current expert group membership and formal JSR-121 process details can be found on the Java Community Process web page.
[2]This article is a copy of the original article posted at OT Land, with permission of LogOn Technology Transfer. The series of original articles available at OT Land, can be downloaded at no cost at:

last update February 21, 2012