James Clampffer created HDFS-10952:
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             Summary: libhdfs++: Fix 
test_libhdfs_threaded_hdfspp_test_shim_static non-deterministic failures
                 Key: HDFS-10952
                 URL: https://issues.apache.org/jira/browse/HDFS-10952
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: James Clampffer
            Assignee: James Clampffer


test_libhdfs_threaded_hdfspp_test_shim_static has started failing more often 
and not a whole lot has changed that should directly impact this.

It looks like the failure mode is error injection in the read pipeline.  Until 
HDFS-10951 is completed reads don't have a retry mechanism so any error 
injection will cause that read to fail.  However that doesn't explain why these 
failures have been happening more frequently lately.  The failures seem to be 
hardware or timing specific; they almost never happen in some environments and 
happen fairly frequently in others.  It might help to set up a test harness to 
step through revisions and see if a specific commit causes the probability of a 
failure to go up.



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