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This fix addresses the current limitation in that an ill-formatted Parquet version string is not properly formatted before appearing in an error message or impalad.INFO. With the fix, any such string is converted to a hex string first. The hex string is a sequence of four hex digit groups separated by spaces and each group is one or two hex digits, such as "6c 65 2e a". Testing: Ran "core" tests successfully. Change-Id: I281d6fa7cb2f88f04588110943e3e768678b9cf1 Reviewed-on: http://gerrit.cloudera.org:8080/16331 Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Sahil Takiar <stakiar@cloudera.com>