Using a master on Java 6 and slaves on Ja

2008-04-19 16:32:22,510 ERROR [STDERR] 19-apr-2008 16:32:22
hudson.node_monitors.AbstractNodeMonitorDescriptor$Record run
WARNING: Failed to monitor hudson.model.Slave$ComputerImpl@1b3aac6 for Free Disk
Space
hudson.util.IOException2: remote file operation failed
at hudson.FilePath.act(FilePath.java:308)
at hudson.node_monitors.DiskSpaceMonitor$1.monitor(DiskSpaceMonitor.java:50)
at hudson.node_monitors.DiskSpaceMonitor$1.monitor(DiskSpaceMonitor.java:45)
at
hudson.node_monitors.AbstractNodeMonitorDescriptor$Record.run(AbstractNodeMonitorDescriptor.java:112)
Caused by: java.io.IOException: Remote call failed
at hudson.remoting.Channel.call(Channel.java:399)
at hudson.FilePath.act(FilePath.java:305)
... 3 more
Caused by: java.lang.NoSuchMethodError: java.io.File.getUsableSpace()J
at
hudson.node_monitors.DiskSpaceMonitor$GetUsableSpace.invoke(DiskSpaceMonitor.java:64)
at
hudson.node_monitors.DiskSpaceMonitor$GetUsableSpace.invoke(DiskSpaceMonitor.java:62)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:1095)
at hudson.remoting.UserRequest.perform(UserRequest.java:69)
at hudson.remoting.UserRequest.perform(UserRequest.java:23)
at hudson.remoting.Request$2.run(Request.java:200)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)