On 12/26/19 11:15 AM, Nikolaos Milas wrote:
> Hello,
>
> MERRY CHRISTMAS to all in list!
>
> After I upgraded to latest: CentOS Linux release 7.7.1908 (Core) I am
> facing nfs crashes which cause the system to hang frequently.
>
> This is caused by cp to nfs-mounted shares.
>
> Below is dmesg output; you will see call traces. These cause system to
> gradually overload:
>
> [root@hesperia1 ~]# top
> top - 10:09:40 up 10:16, 1 user, load average: 53.66, 54.13, 52.98
> Tasks: 475 total, 2 running, 436 sleeping, 0 stopped, 37 zombie
> %Cpu(s): 0.1 us, 0.6 sy, 0.0 ni, 99.2 id, 0.0 wa, 0.0 hi, 0.0 si,
> 0.1 st
> KiB Mem : 3879928 total, 813504 free, 1733216 used, 1333208 buff/cache
> KiB Swap: 4063228 total, 4062708 free, 520 used. 1797264 avail Mem
>
> and finally hangs showing messages (which I have not recorded precisely)
> in the CLI login screen like "System out of memory". Then I have to reboot.
>
> I tried to downgrade nfs-utils and rpcbind to earlier versions (in case
> there is a bug in latest ones), but I couldn't:
>
> [root@hesperia1 ~]# yum downgrade rpcbind-0.2.0-47 nfs-utils-1.3.0-61
> Loaded plugins: fastestmirror
> Loading mirror speeds from cached hostfile
> * base: ftp.ntua.gr
> * epel: mirrors.daticum.com
> * extras: ftp.ntua.gr
> * updates: ftp.ntua.gr
> No package rpcbind-0.2.0-47 available.
> No package nfs-utils-1.3.0-61 available.
> Error: Nothing to do
>
...
you don't have to specify versions, just
yum downgrade rpcbind nfs-utils
and then yum will work out the versions by itself, and their
dependencies - in this case, it appears that you'll have to downgrade
some libraries as well.
HTH,
Kay
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