Re: ldap: ping does not return

From "Re: Latest FC kernel still have SMP bugs?" Nigel Wade wrote: > Herbert Gasiorowski wrote: > >> Nigel Wade wrote: >> >>> Herbert Gasiorowski wrote: >>> >>>>> I've built the RHEL3 kernel on FC1 and run the system up using >>>>> this. Ordinary ldap requests seem quite happy, but I'm still >>>>> seeing the futex lock problem with nss_ldap. E.g. when I add >>>>> 'hosts: files ldap dns' to /etc/nsswitch.conf I get: >>>>> >>>>> # strace ping host >>>>> munmap(0xb75ff000, 4096) = 0 >>>>> uname({sys="Linux", node="hostname", ...}) = 0 >>>>> futex(0x53e4ec, FUTEX_WAIT, 2, NULL >>>>> >>>>> Setting LD_ASSUME_KERNEL=2.4.1 cures this particular problem, but >>>>> isn't a solution for a system relying on LDAP for all >>>>> authentication and NSS functions. >>>> >>>> >>>> >>>> >>>> >>>> >>>> The problem remains in FC2 (Test 3) with the 2.6 kernel! >>>> >>>> LD_ASSUME_KERNEL=2.4.1 seems to cure at least "ping host" >>>> >>>> >>> >>> This is in some way related to nscd. >>> >>> If nscd isn't running hosts don't resolve using LDAP. AFAIK, nscd >>> should not be compulsory. >>> >> >> Thanks, this seems to solve my problem and finally I managed to >> install nscd! >> > > I do this, but I have to say I don't like it. It's very precarious - > if nscd hangs or crashes for some reason the m/c is unusable. You > can't even login as root at the console to fix nscd if host resolution > is hanging. Eventually pretty much everything hangs. Actually it does not solve my problem: I need to use "hosts: files ldap dns" in nsswitch.conf, but then again ping never returns and nscd crashes. (It only works with "hosts: files dns ldap" and nscd)