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https://issues.apache.org/jira/browse/HADOOP-13017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-13017:
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Description:
HDFS-10277 showed that HDFS was return -1 on read(buf[], 0, 0) when there was
no data left in the stream; Java IO says
bq. If {{len}} is zero, then no bytes are read and {{0}} is returned;
otherwise, there is an attempt to read at least one byte.
Review the implementations of {{IOStream.read
was:
HDFS-10277 showed that HDFS was return -1 on read(buf[], 0, 0) when there was
no data left in the stream; Java IO says
bq. If {{len}} is zero, then no bytes are read and {{0}} is returned;
otherwise, there is an attempt to read at least one byte.
This patch clarifies the fsinputstream specification, and fixes
{{DFSInputStream}} to address this
> verify implementations of IOStream.read(buffer, offset, bytes) fail fast if
> the bytes==0
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-13017
> URL: https://issues.apache.org/jira/browse/HADOOP-13017
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
>
> HDFS-10277 showed that HDFS was return -1 on read(buf[], 0, 0) when there was
> no data left in the stream; Java IO says
> bq. If {{len}} is zero, then no bytes are read and {{0}} is returned;
> otherwise, there is an attempt to read at least one byte.
> Review the implementations of {{IOStream.read
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