Solrcloud tlog are not deleted

[Michel Bamouni]

Hello,


We had setup a synchronization between our solr instances on 2 datacenters by 
using  the CDCR.
until now, every thing worked fine but after an upgrade from solr 7.3 to solr 
7.7, we are facing an issue.
Indeed, our tlog files are not deleted even if we see the new values on the  
two solr.
It is like that the hard commit doesn't occur.
In our solrconfig.xml file, we had configure the autocommit as below :


    <autoCommit>
      <maxTime>${solr.autoCommit.maxTime:15000}</maxTime>
      <openSearcher>false</openSearcher>
    </autoCommit>


and the softautocommit looks like that:

    <autoSoftCommit>
      <maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime>
    </autoSoftCommit>


if someone has already meet this issue, I'm looking for your return.


Best regards,


Michel