Just to rule out the obvious culprits:

- The Mac hardware is in good general health?

- There is plenty of free memory? The system is not swapping?

- There isn't some process running and taking a lot of cpu? Spotlight indexing, 
Time Machine backup, some anti-virus real-time scanner?

Even though Macs are great machines, even they can get messed up and become 
slow.

-- Sami

Chuck Doucette <cdouce...@everyscape.com> kirjoitti 24.8.2012 kello 20.19:

> We are running Jenkins 1.478.
> The master node is running on Windows 2003 (xp).
> It has 3 slaves - 2 other Windos machines and 1 Mac.
> The mac machine was working fine - then when I attempted to upgrade the O/S 
> (from Snow Leopard to Lion) it failed due to disk errors.
> I've since reconstituted the machine from scratch - so all of the hardware is 
> the same but all of the software (and configurations) are brand new (Mountain 
> Lion).
> 
> Something appears to be causing one of our slave nodes (on Mac OSX) to take 
> longer and longer to respond.
> It's currently at ~1000ms response time.
> It has gotten up to 3000ms response time.
> 
> I have added two things to slave's launch JVM options to help in diagnosing 
> and resolving the problem:
> 1) -Dcom.sun.management.jmxremote (so I can monitor the performance of the 
> slave process via jconsole)
> 2) -Xmx2048m (to use 2GB of the 3GB of physical memory available on the 
> machine)
> 
> The timeouts have apparently caused jobs to fail with errors about channel 
> closing:
> Started by upstream project "ScapeFolio" build number 83
> 
> [EnvInject] - Loading node environment variables.
> [EnvInject] - [ERROR] - SEVERE ERROR occurs: 
> hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected 
> termination of the channel
> Archiving artifacts
> ERROR: Publisher hudson.tasks.Mailer aborted due to exception
> 
> hudson.remoting.ChannelClosedException
> : channel is already closed
>       at 
> hudson.remoting.Channel.send(Channel.java:492)
> Started by upstream project "ScapeFolio" build number 83
> 
> [EnvInject] - Loading node environment variables.
> [EnvInject] - [ERROR] - SEVERE ERROR occurs: 
> hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected 
> termination of the channel
> Archiving artifacts
> ERROR: Publisher hudson.tasks.Mailer aborted due to exception
> 
> hudson.remoting.ChannelClosedException
> : channel is already closed
>       at 
> hudson.remoting.Channel.send(Channel.java:492)
> 
> Does anyone have any recommendations on how to diagnose and resolve these 
> problems?
> 
> Thanks,
> Chuck
> 
> 

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