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When IMPALA-14462 added tie-breaking logic to ScanRangeOldestToNewestComparator, it relied on absolute path being unset if the relative path is set. However, the code always sets absolute path and uses an empty string to indicate whether it is set. This caused the tie-breaking logic to see two unrelated scan ranges as equal, triggering a DCHECK when running query_test/test_tuple_cache_tpc_queries.py. The fix is to rearrange the logic to check whether the relative path is not empty rather than checking whether the absolute path is set. Testing: - Ran query_test/test_tuple_cache_tpc_queries.py - Ran custom_cluster/test_tuple_cache.py Change-Id: I449308f4a0efdca7fc238e3dda24985a2931dd37 Reviewed-on: http://gerrit.cloudera.org:8080/23495 Reviewed-by: Michael Smith <michael.smith@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Yida Wu <wydbaggio000@gmail.com> Reviewed-by: Joe McDonnell <joemcdonnell@cloudera.com>