Since some time now, Hudson build nodes go offline after successful or failed
builds.

I have a single one, with just 16MB free space in /tmp, but when I go to the
"Nodes" page in Hudson and click the "refresh status" button, the node goes
offline (no builds running!). If I bring it back online, it stays like that
until I refresh the status or run a build.

How can I trace this defect in Hudson's logs? I fought for Hudson adoption in my
company and now I'm looking bad

Thanks in advance,

Bruno A