solrcloud configuration: solr failed to start with multiple zookeeper servers

[Gu, Steve (CDC/OD/OADS) (CTR)]

Hi,

I am prototyping solrcloud and I have three zookeeper servers 
(localhost:2181,localhost:2182,localhost:2183).  I set the zkHost in 
solr.in.cmd file as:

set ZK_HOST="localhost:2181,localhost:2182,localhost:2183"

After zk servers have started, I got the following error when I tried to start 
solr:  localhost:2182 was unexpected at this time.

Solr starts ok if I set ZK_Host to only one server, such as set 
ZK_HOST="localhost:2181".

Any suggestions?

Thanks
Steve