Hi,

We're using Cassandra with 2 DC
- one OLTP Cassandra, 6 nodes, with RF3
- the other is a Brisk, 3 nodes, with RF1

We noticed that when I do a write-then-read operation on the Cassandra DC, it 
fails with the following information (from cqlsh):
Unable to complete request: one or more nodes were unavailable.
- write: LOCAL_QUORUM, successful
- read: LOCAL_QUORUM, using the secondary indexed column, fail

Seems it's taking a long while working on this. When I retry the same query 
after ~10 minutes, it succeeds actually.

Any help is appreciated.

Thanks,
Hefeng

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