[jira] [Created] (HDFS-12714) Hadoop 3 missing fix for HDFS-5169

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

Joe McDonnell created HDFS-12714:
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             Summary: Hadoop 3 missing fix for HDFS-5169
                 Key: HDFS-12714
                 URL: https://issues.apache.org/jira/browse/HDFS-12714
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: native
    Affects Versions: 3.0.0-alpha3, 3.0.0-alpha4, 3.0.0-alpha2, 3.0.0-beta1, 3.0.0-alpha1
            Reporter: Joe McDonnell


HDFS-5169 is a fix for a null pointer dereference in translateZCRException. This line in hdfs.c:

ret = printExceptionAndFree(env, jthr, PRINT_EXC_ALL, "hadoopZeroCopyRead: ZeroCopyCursor#read failed");
should be:
ret = printExceptionAndFree(env, exc, PRINT_EXC_ALL, "hadoopZeroCopyRead: ZeroCopyCursor#read failed");
Plainly, translateZCRException should print the exception (exc) passed in to the function rather than the uninitialized local jthr.

The fix for HDFS-5169 (part of HDFS-4949) exists on hadoop 2.* branches, but it is missing on hadoop 3 branches including trunk.

Hadoop 2.8:
https://github.com/apache/hadoop/blob/branch-2.8/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c#L2514

Hadoop 3.0:
https://github.com/apache/hadoop/blob/branch-3.0/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c#L2691



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