[jira] [Created] (HDFS-15472) Erasure Coding: Support fallback read when zero copy is not supported

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

dzcxzl created HDFS-15472:
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             Summary: Erasure Coding: Support fallback read when zero copy is not supported
                 Key: HDFS-15472
                 URL: https://issues.apache.org/jira/browse/HDFS-15472
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: dzcxzl


[HDFS-8203|https://issues.apache.org/jira/browse/HDFS-8203] 

ec does not support zeor copy read, but currently does not support fallback read, it will throw an exception.
{code:java}
Caused by: java.lang.UnsupportedOperationException: Not support enhanced byte buffer access.
    at org.apache.hadoop.hdfs.DFSStripedInputStream.read(DFSStripedInputStream.java:524)
    at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:188)
    at org.apache.hadoop.hive.shims.ZeroCopyShims$ZeroCopyAdapter.readBuffer(ZeroCopyShims.java:79)
{code}
 



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