JRun 4 Updater 6: Browsing a clustered Instance on restart causes "500 Server" error

This TechNote provides a link to the JRun 4 Updater 6 hot fix JAR file that contains the fix for the following JRun defect:

61987 - JRun Clustering: When browsing a cluster while an instance is starting, the server throws a "500 Server error Service Temporarily Unavailable" message in the browser window until the instance has fully started.

JRun throws the "Server 500 - Service Temporarily Unavailable" error if a requests hits the instance while it's starting up.

Note: Adobe strongly recommends installing and testing hot fixes in your testing/staging environment prior to deployment on live production systems.

JRun engineering has fixed the JRun issue with the hot fix provided below. Follow the instructions to install the hot fix :

Download and unzip the hot fix JAR file (41K).

Copy the JAR file into the servers\lib directory (or "servers/lib" on Unix and Linux).

Open the jrun.policy located in JRun-Home/lib and add the following line:

permission java.lang.RuntimePermission "getServerJNDIContext";

Example is as follows:

permission java.lang.RuntimePermission "setIO";

permission java.lang.RuntimePermission "setSecurityManager";

permission java.lang.RuntimePermission "getClassLoader";

permission java.lang.RuntimePermission "setContextClassLoader";

permission java.lang.RuntimePermission "modifyThread";

permission java.lang.RuntimePermission "modifyThreadGroup";

permission java.lang.RuntimePermission "stopThread";

permission java.lang.RuntimePermission "setFactory";

permission java.lang.RuntimePermission "writeFileDescriptor";

permission java.lang.RuntimePermission "getSecurityContext";

permission java.lang.RuntimePermission "getServerJNDIContext";

This hot fix is compatible with JRun 4 Updater 6 (build 106363) and greater. You can verify your build number by one of the following options:

Open the JRun Management Console. Select Settings, then Version, to display the build number.
Run the following command at the command prompt:

On Windows 2000, NT and Win9x:

cd "{jrun-base-dir}\bin"

jrun -info

On Unix and Linux:

cd $JRUN_HOME/bin

jrun -info

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JRun 4 Updater 6: Browsing a clustered Instance on restart causes "500 Server" error

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