with ver 1.1.0 it works fine with the mongodb

but form 1.1.1 it throws an error：
[cluster-ClusterId

{value='564dc027100ec11340cc7c64', description='null'}

-114.129.12.191:7002] INFO org.mongodb.driver.cluster - No server chosen by PrimaryServerSelector from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, all=[ServerDescription

{address=114.129.12.191:7002, type=UNKNOWN, state=CONNECTING}

]}. Waiting for 30000 ms before timing out

to see the source code of appender for mongodb with the attachment file