[jira] [Created] (IMPALA-11785) impala-shell should produce a warning if Thrift's fastbinary package isn't working

["Joe McDonnell (Jira)" <ji...@apache.org>]

Joe McDonnell created IMPALA-11785:
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             Summary: impala-shell should produce a warning if Thrift's fastbinary package isn't working
                 Key: IMPALA-11785
                 URL: https://issues.apache.org/jira/browse/IMPALA-11785
             Project: IMPALA
          Issue Type: Improvement
          Components: Clients
    Affects Versions: Impala 4.3.0
            Reporter: Joe McDonnell


Thrift's fastbinary package accelerates the binary protocol for Thrift with native code, and it can make a large difference in performance for impala-shell (and other clients). Differences in compilers or other build-time discrepancies can cause it to fail to load. When that happens, it falls back to the non-accelerated Python code.

Currently, there is no warning when it falls back to the non-accelerated code. We should change impala-shell to issue a warning in this case. One way to do that is to try to import thrift.protocol.fastbinary and issue a warning if it fails to import.
{noformat}
try:
  import thrift.protocol.fastbinary
  print("Successfully imported fastbinary")
except:
  print("Could not import fastbinary"){noformat}



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