This is the second occurrence of the mongos process crashing while it is trying to rebalance the shards. It also appears that the crash is occurring after the stop time in the sharding window.

Mongo sharding window configuration:
mongos> db.settings.findOne(

{ _id : "balancer" }

)
{
"_id" : "balancer",
"activeWindow" :

{ "start" : "01:00", "stop" : "13:00" }

}

Attached is the log extract for the period leading up to the crash of mongos.

Output for: uname -a
Linux dalwork3.clarity.net 2.6.18-238.21.1.el5 #1 SMP Tue Aug 9 11:57:24 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux

Output for: mongos --version
Tue Jun 26 14:24:26 mongos db version v2.0.6, pdfile version 4.5 starting (--help for usage)
Tue Jun 26 14:24:26 git version: e1c0cbc25863f6356aa4e31375add7bb49fb05bc
Tue Jun 26 14:24:26 build info: Linux ip-10-110-9-236 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_41

Our Mongo Servers can be viewed in MMS under "Clarity Services"

Thank you for such a great product!

Regards,
Reid Morrison
Software Architect
Clarity Services