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https://issues.apache.org/jira/browse/HADOOP-13203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-13203:
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Attachment: HADOOP-13203-branch-2-007.patch
HADOOP-13203 Patch 007 cleanup, including findbugs and checkstyle
While this patch is ready for some review, there's one feature I want to write
a test for and then address: a read which starts in the current requested range
but which goes past it causes the stream to be closed, starting again at the
new position. This can be fixed.
I plan to do it by having the {{read(bytes[])}} return only the bytes in the
current request; this meets the semantics of {{read(bytes[])}}. The
{{readFullly()}} calls already iterate on the reads(), so this is handled at
that level...there is no need to be clever further down.
> S3a: Consider reducing the number of connection aborts by setting correct
> length in s3 request
> ----------------------------------------------------------------------------------------------
>
> Key: HADOOP-13203
> URL: https://issues.apache.org/jira/browse/HADOOP-13203
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.8.0
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Attachments: HADOOP-13203-branch-2-001.patch,
> HADOOP-13203-branch-2-002.patch, HADOOP-13203-branch-2-003.patch,
> HADOOP-13203-branch-2-004.patch, HADOOP-13203-branch-2-005.patch,
> HADOOP-13203-branch-2-006.patch, HADOOP-13203-branch-2-007.patch,
> stream_stats.tar.gz
>
>
> Currently file's "contentLength" is set as the "requestedStreamLen", when
> invoking S3AInputStream::reopen(). As a part of lazySeek(), sometimes the
> stream had to be closed and reopened. But lots of times the stream was closed
> with abort() causing the internal http connection to be unusable. This incurs
> lots of connection establishment cost in some jobs. It would be good to set
> the correct value for the stream length to avoid connection aborts.
> I will post the patch once aws tests passes in my machine.
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