Duplicate an elasticsearch cluster

I just started to use elasticsearch and created a small cluster (2 machines)
filled with some index data. So far everything works well.

Now I have to duplicate the cluster on another two machines and hopefully I
do not have to index everything again.

I did one-to-one copying for the data directory from the old cluster to the
new cluster. After I restarted the cluster, my client code (in pyes) shows
error "IndexMissingException: [test-profile] missing", where "test-profile"
is the index name.

Since the data directory contains mata info, I thought restarting the
cluster with copied data should automatically work. Now it seems not the
case. Could someone point out what could be the potential problem here?


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