cgroup: downgrade the log level of "invocation id" messages to debug (#7422)

Now that d3070fbdf6077d7d has been merged, these errors are not as
critical as they used to be.

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 7e61b5ad22e65ae1b1045725138d53ad2a7cea49..f3abf659531c9cda7e85f07fc913260449751248 100644 (file)
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -1486,7 +1486,7 @@ static void cgroup_xattr_apply(Unit *u) {
                          sd_id128_to_string(u->invocation_id, ids), 32,
                          0);
         if (r < 0)
-                log_unit_warning_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", u->cgroup_path);
+                log_unit_debug_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", u->cgroup_path);
 }
 
 static bool unit_has_mask_realized(