mongodb - Unable to upgrade mongod configuration server -

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after running brand new cluster 6 hours. restarted 1 of mongos instances , failed:

... wed jul 10 22:02:36.526 [mongosmain] error: error upgrading config database v4 :: caused :: newer version 4 of mongo config metadata required, current version 1, need run mongos --upgrade

i ran following command:

mongos --configdb mongoconfig1.xxxxx.com:1234,mongoconfig2.xxxxx.com:1234,mongoconfig3.xxxxx.com:1234 --upgrade

which failed.

... wed jul 10 22:10:39.218 [mongosmain] starting upgrade of config server v1 v4 wed jul 10 22:10:39.355 [mongosmain] distributed lock 'configupgrade/mongos2.xxxxx.com:12345:1373494238:1804289383' unlocked. wed jul 10 22:10:39.356 [mongosmain] error: error upgrading config database v4 :: caused :: newer version 4 of mongo config metadata required, current version 1, don't know how upgrade version

this error seems strange. machines running latest version 2.4.5. has seen before? ideas in how resolve this?

also seeing lot of this:

resetting shard version of certiorem.feeds on mongoshard3.xxxx.com:12345, version zero


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