MongoS server not starting also not balancing Server's sharding metadata manager failed asking for instance is manually reset

From: Virendra Agarwal <agarwal.viren@xxxxxxxxx>
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Mon, 2 May 2016 05:51:56 -0700 (PDT)
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My MongoS servers are not staring they are sending this error in logs.  

    SHARDING [Balancer] caught exception while doing balance: Server's 
sharding  metadata manager failed to initialize and will remain in this 
state until the instance is manually reset :: caused by :: HostNotFound: 
unable to resolve DNS for host confserv_1.indiatimes.com  

    2016-05-02T17:57:06.612+0530 I SHARDING [Balancer] about to log 
metadata event into actionlog: { _id: 
"iBeatDB2255-2016-05-02T17:57:06.611+0530-5727479aa1051c5fb04fcc49", 
server: "mongoS1", clientAddr: "", time: new Date(1462192026611), what: 
"balancer.round", ns: "", details: { executionTimeMillis: 35, errorOccured: 
true, errmsg: "Server's sharding metadata manager failed to initialize and 
will remain in this state until the instance is manually reset :: caused by 
:: HostNotFoun..." } }  

When i connect config server using host name it is working fine.  
I tried to restart MOngoS server it is not coming up.

Please help me.

Thanks  
Viren



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