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https://issues.apache.org/jira/browse/HDFS-15472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17305983#comment-17305983
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dzcxzl commented on HDFS-15472:
-------------------------------
Can you review this patch when you are free? [~ayushtkn] [~weichiu]
> 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
> Priority: Trivial
> Attachments: HDFS-15472.000.patch, HDFS-15472.001.patch
>
>
> [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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