[Samba] Samba 3.5.8 (and 3.5.5) shipped with Solaris 10 keeps crashing when smbd process count hits about 500-600
matti.rintala at tamk.fi
Thu Sep 1 04:01:21 MDT 2011
> -----Original Message-----
> From: Volker Lendecke [mailto:Volker.Lendecke at SerNet.DE]
> Sent: 1. syyskuuta 2011 12:49
> To: Matti Rintala
> Cc: samba at lists.samba.org
> Subject: Re: [Samba] Samba 3.5.8 (and 3.5.5) shipped with Solaris 10
> keeps crashing when smbd process count hits about 500-600
> On Thu, Sep 01, 2011 at 11:32:32AM +0300, Matti Rintala wrote:
> > We are running Samba on Solaris 10 cluster as a HA
> > service. There are two nodes in the cluster and Samba
> > versions are 3.5.8 on other node and 3.5.5 on another.
> > Samba build is one that ships with Solaris 10. We are
> > using Sun (Oracle) LDAP for user account data so passwd
> > and group databases related information is retrieved from
> > there. Authentication is done against Windows 2008 AD.
> > This Samba service is serving users home directories. Same
> > data is also shared using NFS. We have over 11000 user
> > accounts. During summer this new service was working
> > nicely but when user count has increased we are
> > experiencing severe problems. When smbd process limit hits
> > about 500 Samba just stops responding and we have to
> > restart it. Usually Oracle Solaris Cluster does restart
> > but it fails because one smbd process won't die even with
> > -9 signal. Nothing really crashes and at least for some
> > time mother smbd keeps forking new childs so process count
> > keeps increasing.
> Not being able to kill a process with -9 is a kernel
> problem. You need to find out what the process is doing,
> although I'm not sure how to do that under Solaris. Can
> truss or some other tool inspect a process that is stuck?
Actually the process dies after a while so maybe it's in I/O wait state. Truss won't exam stuck process, I can't remember actual error message. However if we restart Samba soon enough, when hang happens, all processes are ended nicely.
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