We are getting continues errors related to sssd.

WARN org.apache.hadoop.security.ShellBasedUnixGroupsMapping: unable to return groups for user -SERV-CHEF-COM-JOIN
PartialGroupNameException The user name '-SERV-CHEF-COM-JOIN' is not found. id: invalid option -- 'S'

I have the following option set in sssd config.
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override_space = _
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++

sssd --version

1.15.2
++

Below error is logged in sssd logs.

[sssd[nss]] [sss_mc_find_record] (0x0010): Corrupted fastcache. name_ptr value is 16.