Hello,

We are getting these errors after a while on our Hudson (~40 connected slaves, Windows various platforms, HP-UX, AIX, Solaris, ...):
Nov 2, 2010 6:04:25 AM hudson.plugins.disk_usage.DiskUsageThread execute
WARNING: Error when recording disk usage for label=vmxphudsonslv4.ancy.fr.sopra
java.io.IOException: Remote call on vmxphudsonslv4.ancy.fr.sopra failed
at hudson.remoting.Channel.call(Channel.java:639)
at hudson.FilePath.act(FilePath.java:778)
at hudson.plugins.disk_usage.DiskUsageThread.calculateWorkspaceDiskUsage(DiskUsageThread.java:127)
at hudson.plugins.disk_usage.DiskUsageThread.execute(DiskUsageThread.java:78)
at hudson.model.AsyncPeriodicWork$1.run(AsyncPeriodicWork.java:51)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.OutOfMemoryError: PermGen space
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
at sun.reflect.MethodAccessorGenerator.generateSerializationConstructor(MethodAccessorGenerator.java:95)
at sun.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:313)
at java.io.ObjectStreamClass.getSerializableConstructor(ObjectStreamClass.java:1327)
at java.io.ObjectStreamClass.access$1500(ObjectStreamClass.java:52)
at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:437)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:413)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:310)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1106)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.java:1246)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)

I don't know if it's related to the Disk usage plugin, but that's when the PermGen started