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From David Jencks <>
Subject Re: Server Shutdown & Reboot issues
Date Tue, 22 Nov 2005 23:12:56 GMT

On Nov 22, 2005, at 2:59 PM, Joe Bohn wrote:

> Does anybody care?
> If not I'll just create a JIRA to remove the reboot capability and add 
> the patch.

Fine with me.  I think the way you describe of "rebooting" the server, 
while it "ought" to work fine, seems likely to run into mysterious 
problems and we are probably better off not claiming it works.

david jencks

> Joe Bohn wrote:
>> The console currently has a task to shutdown or reboot the server.
>> Shutdown isn't a problem ... it just invokes kernel.shutdown() 
>> followed by a system exit.  (Although the visual results to the user 
>> are slightly different depending upon the configuration most likely 
>> because of differences of synchronous/asynchronous variations during 
>> shutdown).
>> However, for reboot it attempts to spawn a new thread and from that 
>> thread invoke kernel.shutdown() followed by an invocation of 
>> Daemon.main with no parameters.  And this doesn't work very well at 
>> all.
>> Should we invest the time now to resolve these problems?  I think the 
>> resolution of these problems could get a bit sticky and would 
>> continue to be fragile if we don't integrate capabilities directly 
>> into the kernel for restart.  It also makes me wonder if we should 
>> also provide a restart from the command line if we support it in the 
>> console.
>> The failures from the reboot vary according to the configuration.  
>> I've only tried this with the default configuration, jetty only, and 
>> tomcat only ... but this is the results:
>> Jetty only
>>  - Gets an error while starting G-Bean 
>> "geronimo:type=NetworkService,name=EJB" and indicates it is in the 
>> failed state.  This was Caused by: Address 
>> already in use: JVM_Bind.  In the error log it looks like the port 
>> was 4201.  However, the things (at least for the console) appear to 
>> work normally after the restart.
>> Tomcat only
>>  - Doesn't get any errors, but results in the JVM terminating without 
>> an attempt at restart.  I haven't tracked down yet who is doing the 
>> system exit but there isn't much in the log to indicate a failure.
>> Both Jetty & Tomcat (Jetty on 8080, Tomcat on 8090)
>> - Gets a whole bunch of error on restart - starting with the same 
>> error as Jetty only above plus numerous errors from Tomcat in 
>> BaseModelMBean, Registry, Connector, JkMain.  However, once again the 
>> console appears to function appropriately (of course it is running on 
>> Jetty).
>> Joe
> -- 
> Joe Bohn
> "He is no fool who gives what he cannot keep, to gain what he cannot 
> lose."   -- Jim Elliot

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