sun cluster problem

Hello everyone,

Can you please help me understand what happened; here is the problem:

We have a sun cluster composed by two nodes (E4900; sSolaris 9), suddenly one of them were inaccessible by PUTTY, however we were able to ping on it. The cluster haven't basculated and after 20 minutes the problem were fixed without any action from us. There is any error's message on the logs.

thank you for your help