Shard data left on disk after MOVE

Elastic Stack Elasticsearch
1

I have many nodes (version 1.7.1), and I disabled shard shard balancing:

"cluster.routing.allocation.enable": "none"

I then move a shard from one node to another using /_cluster/reroute, which is successful.

The problem is the data for the shard remains on the original node

/data4/mycluster/nodes/0/indices/myindex/15

After many moves, both in and out of a node, and across many different indexes, the drive fills up. I must login to the node, and delete the directories for shards that have long left that node to free up space.

Is there a setting that will remove data from disk for shards that do not exist?

thanks

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