Fri Sep 19 17:51:56.910 [conn37] moveChunk result: { cause: { ok: 0.0, errmsg: "still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }, ok: 0.0, errmsg: "moveChunk failed to engage TO-shard in the data transfer: still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }
Fri Sep 19 17:51:56.910 [conn37] Assertion: 10412:moveAndCommit failed: { cause: { ok: 0.0, errmsg: "still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }, ok: 0.0, errmsg: "moveChunk failed to engage TO-shard in the data transfer: still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }
0xa75141 0xa3b5fb 0xa3bb3c 0x8b6e8a 0x9b176a 0x9b4e0c 0x9886d1 0x665591 0xa6195e 0x35fba077e1 0x35fb6e68ed 
 /mongodb/bin/mongos(_ZN5mongo15printStackTraceERSo+0x21) [0xa75141]
 /mongodb/bin/mongos(_ZN5mongo11msgassertedEiPKc+0x9b) [0xa3b5fb]
 /mongodb/bin/mongos() [0xa3bb3c]
 /mongodb/bin/mongos(_ZNK5mongo5Chunk13splitIfShouldEl+0x202a) [0x8b6e8a]
 /mongodb/bin/mongos(_ZN5mongo13ShardStrategy7_insertERKSsRNS_9DbMessageEiRNS_7RequestE+0xd8a) [0x9b176a]
 /mongodb/bin/mongos(_ZN5mongo13ShardStrategy7writeOpEiRNS_7RequestE+0x53c) [0x9b4e0c]
 /mongodb/bin/mongos(_ZN5mongo7Request7processEi+0xd1) [0x9886d1]
 /mongodb/bin/mongos(_ZN5mongo21ShardedMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x71) [0x665591]
 /mongodb/bin/mongos(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x42e) [0xa6195e]
 /lib64/libpthread.so.0() [0x35fba077e1]
 /lib64/libc.so.6(clone+0x6d) [0x35fb6e68ed]
Fri Sep 19 17:51:56.915 [conn37] warning: could not autosplit collection AWrods20140919.hug_http_post :: caused by :: 10412 moveAndCommit failed: { cause: { ok: 0.0, errmsg: "still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }, ok: 0.0, errmsg: "moveChunk failed to engage TO-shard in the data transfer: still waiting for a previous migrates data to get cleaned, can't accept new chunks, num threads: 357" }