hi,

In one of our CDH cluster (v5.0.0-beta1), zookeeper max connections are set to 60.

Now I found zookeeper logs out too many connections from Cloudera Manager.

view the connections by four-letter command 'cons',  output show as follows:

/192.168.56.80:36983[1](queued=0,recved=23475,sent=23475,sid=0x24ab7bb4e4d3abc,lop=PING,est=1420970377026,to=30000,lcxid=0x3d,lzxid=0x1d0002f281,lresp=1421204775170,llat=0,minlat=0,avglat=0,maxlat=17)
/192.168.56.80:35647[1](queued=0,recved=39836,sent=39836,sid=0x24ab7bb4e4d2724,lop=PING,est=1420806577434,to=30000,lcxid=0x3d,lzxid=0x1d0002f281,lresp=1421204770544,llat=0,minlat=0,avglat=0,maxlat=320)
/192.168.56.80:37019[1](queued=0,recved=14665,sent=14665,sid=0x24ab7bb4e4d457e,lop=PING,est=1421058577925,to=30000,lcxid=0x3d,lzxid=0x1d0002f281,lresp=1421204775172,llat=0,minlat=0,avglat=0,maxlat=39)

......

view Cloudera Manager log,  error information below occurs many times.

2015-01-12 11:50:32,445 ERROR [Parcel Update Service:components.ParcelDownloaderImpl@371] (3 skipped) Failed to download manifest. Status code: 404 URI: http://archive.cloudera.com/cdh5/parcels/latest/manifest.json

I wonder what conditions would cause Cloudera Manager to create massive connections to zookeeper.

and how do I solve it?

thanks in advance.