Problem with Alpha and strange message.

[Carlos Lopez]

Hello, we have a 4 node cluster with Alphas, and lately I've been 
recieving the next messages from the console of the master node:


Sep 18 15:56:47 master kernel: TSUNAMI machine check: vector=0x630
pc=0xfffffc0000333410 code=0x100000086
Sep 18 15:56:47 master kernel: machine check type: correctable ECC error
(retryable)
Sep 18 15:56:47 master kernel: TSUNAMI machine check: vector=0x630
pc=0xfffffc0000332de4 code=0x100000086
Sep 18 15:56:47 master kernel: machine check type: correctable ECC error
(retryable)
Sep 18 15:56:47 master xfs: xfs startup succeeded
Sep 18 15:56:47 master xfs: Warning: The directory
"/usr/share/fonts/default/TrueType" does not exist.
Sep 18 15:56:47 master xfs:          Entry deleted from font path.
Sep 18 15:56:48 master kernel: TSUNAMI machine check: vector=0x630
pc=0xfffffc0000331224 code=0x100000086
Sep 18 15:56:48 master kernel: machine check type: correctable ECC error
(retryable)
Sep 18 15:56:58 master PAM_pwdb[741]: (login) session opened for user
root
by LOGIN(uid=0)



And it's been freezing at times... anyone knows what is going on???

thanks a lot for any help.
natorro