Greetings, I am running a very high-volume FreeRADIUS installation on RHEL 5 (not my choice), and noticed that FreeRADIUS was periodically dying after instantiating a great many worker servers. I looked at the output in GDB and got: Continuing. [New LWP 11400] [tcsetpgrp failed in terminal_inferior: Operation not permitted] (no debugging symbols found) [Thread debugging using libthread_db enabled] [New Thread 47272748113904 (LWP 11350)] [New Thread 1328978240 (LWP 11441)] [New Thread 1318488384 (LWP 11439)] [New Thread 1370937664 (LWP 11438)] [New Thread 1307998528 (LWP 11437)] [New Thread 1360447808 (LWP 11436)] [New Thread 1140160832 (LWP 11435)] [New Thread 1297508672 (LWP 11434)] [New Thread 1287018816 (LWP 11433)] [New Thread 1276528960 (LWP 11432)] [New Thread 1266039104 (LWP 11431)] [New Thread 1119181120 (LWP 11430)] [New Thread 1255549248 (LWP 11429)] [New Thread 1245059392 (LWP 11428)] [New Thread 1234569536 (LWP 11427)] [New Thread 1129670976 (LWP 11423)] [New Thread 1203099968 (LWP 11422)] [New Thread 1339468096 (LWP 11421)] [New Thread 1108691264 (LWP 11420)] [New Thread 1349957952 (LWP 11419)] [New Thread 1213589824 (LWP 11412)] [New Thread 1224079680 (LWP 11411)] [New Thread 1094392128 (LWP 11410)] [New Thread 1538775360 (LWP 11406)] [New Thread 1528285504 (LWP 11405)] [New Thread 1517795648 (LWP 11404)] [New Thread 1192610112 (LWP 11403)] [New Thread 1507305792 (LWP 11402)] [New Thread 1496815936 (LWP 11401)] [New Thread 1486326080 (LWP 11400)] [New Thread 1475836224 (LWP 11399)] [New Thread 1465346368 (LWP 11398)] [New Thread 1454856512 (LWP 11397)] [New Thread 1444366656 (LWP 11396)] [New Thread 1433876800 (LWP 11395)] [New Thread 1423386944 (LWP 11394)] [New Thread 1412897088 (LWP 11393)] [New Thread 1161140544 (LWP 11392)] Program received signal SIGTRAP, Trace/breakpoint trap. [Switching to Thread 1486326080 (LWP 11400)] 0x00002afe89997d19 in dl_open_worker () from /lib64/ld-linux-x86-64.so.2 (gdb) Continuing. Program received signal SIGABRT, Aborted. 0x00002afe8ad3d155 in raise () from /lib64/libc.so.6 Is this a bug in the x64 libdl? -- Alex -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (706) 338-8599