Too many open files EAP-TLS

Jason Englander jasoneng3 at
Mon Jan 3 19:41:33 CET 2011

I've got a client's server running FreeRADIUS 2.1.10 from source.  Linux
kernel, heavily customized Slackware 13.0  So far, not using
chroot, running as root.

It's a EAP-TLS setup with OpenSSL verifying via 'client = ',
tmpdir = /tmp/radiusd

Everything has been fine for weeks, but this morning:

Jan  3 08:04:32 dns1 radiusd[22737]: Invalid user: [xxxxxx/<no User-Password 
attribute>] (from client xxxx port 0 cli xx-xx-xx-xx-xx-xx)
Jan  3 08:04:36 dns1 radiusd[22737]: [auth_log] rlm_detail: Couldn't open file 
/var/log/radius/radacct/x.x.x.x/auth-detail-20110103: Too many open files

I checked 'lsof -p' against the running radiusd and the line count of it's
output was 1054.  Other than the typical linked libraries, socket, etc. at
the top, the rest was "(deleted)" lines like this one:

radiusd 22737 root 1022u   REG      104,2    1334  404429 
/tmp/radiusd/radiusd.client.XXGcdadx (deleted)

In the meantime, I raised the limit with ulimit and restarted.

I'm open to further (late night) testing, patching, whatever...


Jason Englander <jason at>
394F 7E02 C105 7268 777A  3F5A 0AC0 C618 0675 80CA

More information about the Freeradius-Users mailing list