Huge number of open files on data node with multiple paths

Hi,

I added a new data node to my cluster with a different configuration from the others.

I have 3 data nodes that use a single "path.data" and it is working fine. The new one was configured to use multiple data paths, as follows:

path.data:
 - /devops/data1
 - /devops/data2

The fact is in this data node the number of open files just increase all the time and now is in ~400000 file descriptors.

ls /proc/29144/fd/ | wc -l
394819

I'm getting this node disconnected from my master nodes repeatedly and I'm assuming that open file descriptors is the reason:

[2020-08-17T12:47:08,398][DEBUG][o.e.a.s.m.TransportMasterNodeAction] [elk05-data] no known master node, scheduling a retry
[2020-08-17T12:47:08,398][DEBUG][o.e.a.s.m.TransportMasterNodeAction] [elk05-data] no known master node, scheduling a retry
[2020-08-17T12:47:08,593][DEBUG][o.e.a.s.m.TransportMasterNodeAction] [elk05-data] no known master node, scheduling a retry
[2020-08-17T12:47:24,396][DEBUG][o.e.a.s.m.TransportMasterNodeAction] [elk05-data] no known master node, scheduling a retry
[2020-08-17T12:47:24,396][DEBUG][o.e.a.s.m.TransportMasterNodeAction] [elk05-data] no known master node, scheduling a retry

Am I missing something here? Any configuration that I should have made in first place?

Any reason to this server behave so differently from the ones with single data path?

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