Amanda-Users

Hung processes w/ Amanda over SSH

2007-10-16 22:42:18
Subject: Hung processes w/ Amanda over SSH
From: Cameron Matheson <cameronm AT webpipe DOT net>
To: amanda-users AT amanda DOT org
Date: Tue, 16 Oct 2007 20:06:43 -0600
Hi Guys,

I've installed Amanda v2.5.2p1 on my servers using SSH auth.  The
backups are working fine (Dumps come in good, and I can restore w/out
any trouble), but I'm seeing a whole bunch of hung ssh/amandad/tar
processes on my clients.  I'm not real clear on what's causing this
(maybe it's the estimates, since the backups are coming in fine?).  The
only thing I've been able to find in my logs that looks odd is the
following (taken from one of my clients):

>>>>>
amandad: time 44.823: security_close(handle=0x9666220, driver=0xd20e60 (SSH))
amandad: time 44.823: security_stream_close(0x9696b80)
amandad: time 59524.148: security_stream_seterr(0x967ead8, write error to : 
Broken pipe)
amandad: time 59524.163: sending NAK pkt:
<<<<<
ERROR write error on stream 499999: write error to : Broken pipe
>>>>>
amandad: time 59524.163: security_stream_close(0x967ead8)
amandad: time 59524.163: security_stream_seterr(0x967ead8, write error to : 
Broken pipe)
amandad: time 59524.163: security_stream_close(0x9686b10)
amandad: time 59524.163: security_stream_seterr(0x9686b10, write error to : 
Broken pipe)
amandad: time 59524.163: security_stream_close(0x968eb48)
amandad: time 59524.163: security_stream_seterr(0x968eb48, write error to : 
Broken pipe)
amandad: time 59524.163: pid 19860 finish time Tue Oct 16 18:30:27 2007

So I can see how that might cause a hung process (strace'ing the
processes generally shows that they're read()ing on something
indefinitely)--but is there anyway to avoid this?

Thanks,
Cameron

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