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  1. IMPALA
  2. IMPALA-4322

test_scanners_fuzz.py hits a DCHECK

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: Impala 2.8.0
    • Fix Version/s: Impala 2.8.0
    • Component/s: Backend
    • Labels:

      Description

      Nightly exhaustive builds are failing. From the Jenkis console:

      ERROR query_test/test_scanners_fuzz.py::TestScannersFuzzing::()::test_fuzz_alltypes[exec_option: {'disable_codegen': False, 'abort_on_error': 1, 'exec_single_node_rows_threshold': 0, 'batch_size': 0, 'num_nodes': 0} | table_format: text/lzo/block]
      

      It looks like this has something to do with the lzo scanner.
      From impalad.FATAL:

      F1018 15:45:14.758010  7262 hdfs-lzo-text-scanner.cc:236] Check failed: read_until >       unprocessed_bytes (0 vs. ^A) 
      F1018 15:45:14.781767  7254 hdfs-lzo-text-scanner.cc:236] Check failed: read_until >       unprocessed_bytes (0 vs. ^E)
      

      http://sandbox.jenkins.cloudera.com/view/Impala/view/Evergreen-asf-master/job/impala-asf-master-exhaustive/98/

      Another strange thing is that 3 minidumps get produced and saved in our logs (1 for every Impalad), but a core dump does not get generated. A core dump should be generated if a DCHECK is hit.

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            • Assignee:
              sailesh Sailesh Mukil
              Reporter:
              tarasbob Taras Bobrovytsky
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              • Created:
                Updated:
                Resolved: