failsafe not working if no groups returned

Joel Rettinger  3:33 PM
After upgrading to 2.6.8 from 2.6.5, loader jobs of type SQL_GROUP_LIST, including the recent memberships loader and the recent memberships change log consumer, are throwing SQL errors when the group query doesn't return any groups:
java.lang.RuntimeException: org.postgresql.util.PSQLException: ERROR: syntax error at or near ")"
  Position: 214,
sql: select count(1) from grouper_memberships gm, grouper_groups gg, grouper_fields gf  where gm.mship_type = 'immediate' and gg.id = gm.owner_group_id  and gf.id = gm.field_id and gf.name = 'members' and gg.name  in (), 
    at edu.internet2.middleware.grouperClient.jdbc.GcDbAccess.callbackResultSet(GcDbAccess.java:2362)
    at edu.internet2.middleware.grouperClient.jdbc.GcDbAccess.selectList(GcDbAccess.java:1759)
    at edu.internet2.middleware.grouperClient.jdbc.GcDbAccess.selectList(GcDbAccess.java:1633)
    at edu.internet2.middleware.grouperClient.jdbc.GcDbAccess.select(GcDbAccess.java:1583)
    at edu.internet2.middleware.grouper.app.loader.GrouperLoaderType.syncGroupList(GrouperLoaderType.java:1631)
....
The recent memberships error goes away if I set up a group with a recent memberships group and loader. If I then delete the recent memberships group, the error comes back.
Oddly this only happens in one of our 2 test environments. I tried deleting the grouperRecentMembershipsLoader group and let it get recreated, in both environments, but that didn't change the state of errors/no-errors for those jobs in either environment.
Is there a configuration or setup I'm missing? I ran all the tasks mentioned in the upgrade notes.
I think the issue may be in the GrouperUtil.batchNumberOfBatches method, which always returns at least "1" because of the rounding down of the int value "(count - 1) / batchSize" ? - maybe just return zero if count == 0 also.
  public static int batchNumberOfBatches(int count, int batchSize) {
    if (batchSize == 0)

    int batches = 1 + ((count - 1) / batchSize);
    return batches;

  }
in gsh:
groovy:000> GrouperUtil.batchNumberOfBatches(0,800)
===> 1