SSL_read failed in a system call (-1), TLS session fails

[Guk Victor]

Hello all,

We're running FreeRADIUS 1.1.3 with EAP/TTLS (openSSL 0.9.8d) on Red Hat 
5.1. The server will come up and process clients for a few days, but, 
every now and then it begins denying all auth-requests with the 
following error:

Error: rlm_eap: SSL error error:1408F119:SSL 
routines:SSL3_GET_RECORD:decryption failed or bad record mac
Error: rlm_eap_tls: SSL_read failed in a system call (-1), TLS session 
fails.
Auth: Login incorrect: [host/user/<no User-Password attribute>]

A restart makes the server happy and it goes back to properly auth'ing 
clients.

Thanks in advance!