Environment:
Build#2135 (Integration Build)
Topology#Tree
sudo mn --topo tree,5 --switch ovsk,protocols=OpenFlow13 --controller remote,ip=10.16.148.232

Problem:
On HBase datastore,"tsdr:list FlowTableStats" doesn't returns the output on karaf console.Its hungs karaf console.

Step to Reproduce:
1.Install odl-tsdr-hbase on ODL controller
2.Once HBase collector started,start the tree topology (as given in environment) on mininet VM [Note: Mininet VM running on remotely]
3.Wait for 1~1.30 hours collection.
4.Issue "tsdr:list FlowTableStats" on karaf console doesn't return output/thrown any error.Waited for almost 16 minutes.

However "tsdr:list Portstats" returns output on 75 seconds.
"tsdr:list FlowStats" returns output on 30 seconds

TSDR collection doesn't broken and also updated in HBase DB.

Note:
===
During problematic time HBase row counts are,
FlowTableMetrics : 2255901 rows
InterfaceMetrics: 127320 rows
FlowMetrics: 27716 rows