{UPR}:: After Rebalance-in-out stop, hit the issue Memcached error #1 'Not found': Not found for vbucket

3.0.0-918, centos 6x, vbuckets = 1024

1. Create 4 node cluster (10.6.2.144-147)
2. Add default bucket
3. Add 100K items to bucket
4. Swap 2 nodes in the cluster (10.6.2.146, 10.6.2.147 out, and 10.6.2.148, 10.6.2.149 in)
5. During rebalance stop it
6. Verify the items present in the cluster

Step 6 hit the exception

MemcachedError: Memcached error #1 'Not found': Not found for vbucket :965 to mc 10.6.2.147:11210

Test case:: /testrunner -i ../palm.ini get-cbcollect-info=False,get-logs=False,stop-on-failure=False,get-coredumps=True,force_kill_memached=False,verify_unacked_bytes=True -t rebalance.rebalanceinout.RebalanceInOutTests.start_stop_rebalance_in_out,nodes_init=4,nodes_in=2,nodes_out=2,num_replicas=1,items=100000,skip_cleanup=True,GROUP=IN_OUT;BASIC;P0

FYI: Test case passes for vbuckets = 128. Sometimes does pass for 1024 as well. But hits quite often