Big free space dis-balance

Hi,
I have 9 node cluster.
I notice that the free space is greatly dis-balanced.

On node1 i have only 90GB left, while on other nodes I still have around
180GB free.

I am pretty sure that no new shards will be allocated as the node is above
the watermark.

I think this started when I upgraded to 1.5 or may be last version from 1.4
series

Is there anything i can do about it ?

Thanks in advance
georgi

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