Ckp file missing

Hi,

We are running Elastic Search 2.3.3 and after a Node restart whilst the Disk Space was very very low, we are getting an error while recovering a shard as it cannot find a cpk file. There is a .tlog file with same name in the same folder but the cpk file is missing.

I have read a few posts about this but it is not clear to me how (or even if) I can recover the CPK from the TLOG file. The TLOG file has some data in it (fairly small, 13kb).

Is there anything I can do to recover it?

Thank you