ceph cluster not respond

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after changing replication factor from 2 to 1
the ceph cluster(mons) doesn't respond to commands
when I run ceph -s i get timeout

everything gone good till  I created EC pool and then each changing in the replication pools cause the cluster to be irresponsive and with one core 100% util with 80 % cpu wait and I can see very high disk util in the 

the lsof command show thats ceph mon write to ldb files(leveldb)

OS: ubuntu 14.04
OStack: kilo
Ceph: Hammer
Git: Sebastian Han automation for ceph 

thanks in advance ,
Niv
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