On Mon, Jun 29, 2020 at 11:06:46AM -0600, Charles Curley wrote: > On Mon, 29 Jun 2020 16:36:33 +0100 > Jose M Calhariz <jose.calha...@tecnico.ulisboa.pt> wrote: > > > On my main amanda installation I have a client that gives time out > > when doing backups. I have researched and checked out the most common > > problems. In the end I have found that: > > > > - "amcheck Config -c client" gives 30 seconds of timeout. > > I do not see that. I checked two clients, one AMD64, the other i386.
On mine main amanda installation and have dozens of Debian clients. It is one client only that is failing and I do not understand why. > > > > > - I do not have any clue on the logs at the client. > > > > - Running the command by hand on the client I get segmentation fault. > > > > /usr/lib/amanda/amandad -auth=ssh amdump > > Segmentation fault > > I see that, on both machines. > OK, so the problem is another. More research to do. Thank you. I will post here when I find more info. > > > > > - Running the command inside gdb I see a NULL pointer. > > > > gdb /usr/lib/amanda/amandad > > GNU gdb (Debian 8.2.1-2+b3) 8.2.1 > > I do not have symbols installed, so of course I can't examine the > variables. I do see a segment fault: > > ... > (gdb) run -auth=ssh amdump > Starting program: /usr/lib/amanda/amandad -auth=ssh amdump > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". > > Program received signal SIGSEGV, Segmentation fault. > 0x00007ffff7f3a687 in stream_sendpkt () from > /usr/lib/x86_64-linux-gnu/amanda/libamanda-3.5.1.so > (gdb) > ... > > I have no idea what is going on here, not having the source in front of > me. But I wonder if this is because amanda is trying to use an SSH > connection that isn't there? > > The first time, I SSHed in as root, did an su - to backup, then ran > gdb. To test my hypothesis above, I went to my amanda server, su - to > backup, then sshed to the client. This time I did not get a seg fault, > and used Ctl-c to end the process: > > (gdb) run -auth=ssh amdump > Starting program: /usr/lib/amanda/amandad -auth=ssh amdump > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". > ^C > Program received signal SIGINT, Interrupt. > 0x00007ffff76a27e4 in __GI___poll (fds=0x55555559e3d0, nfds=2, timeout=30000) > at ../sysdeps/unix/sysv/linux/poll.c:29 > 29 ../sysdeps/unix/sysv/linux/poll.c: No such file or directory. > (gdb) > > > > This is with the bog standard Buster version of amanda: > > root@dzur:~# pre amanda > amanda-client 1:3.5.1-2+b2 amd64 > amanda-common 1:3.5.1-2+b2 amd64 > root@dzur:~# > > Kind regards Jose M Calhariz -- -- A ciência aumenta nosso poder na mesma proporção que diminui o nosso orgulho --Claude Bernard
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