mongos crashing for unknown reason. (twice in past few hours). appears to be related to issue between primary and secondary while etl is firing. also unlcear as to why there is an issue between primary and secondary. logs below: thx!

Tue Mar 20 18:05:34 [conn315] ReplicaSetMonitor::_checkConnection: my21orl53.cityofchicago.org:27018

{ setName: "shard3", ismaster: false, secondary: true, hosts: [ "my21orl53.cityofchicago.org:27018", "my07orl04.cityofchicago.org:27018" ], arbiters: [ "my21orl53.cityofchicago.org:27020" ], me: "my21orl53.cityofchicago.org:27018", maxBsonObjectSize: 16777216, ok: 1.0 }

Tue Mar 20 18:05:35 [conn314] got not master for: my21orl53.cityofchicago.org:27018
Received signal 11
Backtrace: 0x54de95 0x3143e302d0 0x7e9e77 0x7f346e 0x7f3d2d 0x5c1e06 0x5c284e 0x5c03b0 0x5c0915 0x767487 0x76f9da 0x776a83 0x7b487d 0x7c6cf1 0x5e6a07 0x3144a0673d 0x3143ed44bd
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo17printStackAndExitEi+0x75)[0x54de95]
/lib64/libc.so.6[0x3143e302d0]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo17WriteBackListener4initERNS_12DBClientBaseE+0x17)[0x7e9e77]
./mongodb-linux-x86_64-2.0.2/bin/mongos[0x7f346e]
./mongodb-linux-x86_64-2.0.2/bin/mongos[0x7f3d2d]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5boost6detail8function17function_invoker4IPFbRN5mongo12DBClientBaseERKSsbiEbS5_S7_biE6invokeERNS1_15function_bufferES5_S7_bi+0x16)[0x5c1e06]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo17ClientConnections13checkVersionsERKSs+0x16e)[0x5c284e]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo15ShardConnection5_initEv+0x2a0)[0x5c03b0]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo15ShardConnectionC1ERKNS_5ShardERKSs+0x85)[0x5c0915]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo8Strategy6insertERKNS_5ShardEPKcRKNS_7BSONObjEib+0x67)[0x767487]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo13ShardStrategy7_insertERNS_7RequestERNS_9DbMessageEN5boost10shared_ptrIKNS_12ChunkManagerEEE+0x7aa)[0x76f9da]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo13ShardStrategy7writeOpEiRNS_7RequestE+0x153)[0x776a83]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo7Request7processEi+0xdd)[0x7b487d]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo21ShardedMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x71)[0x7c6cf1]
./mongodb-linux-x86_64-2.0.2/bin/mongos(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x287)[0x5e6a07]
/lib64/libpthread.so.0[0x3144a0673d]
/lib64/libc.so.6(clone+0x6d)[0x3143ed44bd]