[
https://issues.apache.org/jira/browse/HADOOP-997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12472872
]
Tom White commented on HADOOP-997:
----------------------------------
This was not intentional. I think initialization should probably not
be retried currently (in the future I might be worth thinking through
the initialization cases that need retrying).
It looks like this might be the cause of the exception you found.
S3 should only retry for IOExceptions - I'll fix this.
I did this for consistency with HDFS and also because of a recent
issue with creating files in /tmp. I agree that createTempFile with
the signature you suggest is the way to go. I'll change it.
Yes, this crossed my mind and I think we should have it. It also
occurred to me that with annotation driven retries (HADOOP-601) you
wouldn't be able to expose the parameters as configurables (as far as
I know).
Possibly. Although the files should be deleted after transfer anyway.
The deleteOnExit was a backup, but you are right that it doesn't
always run.
On failure I want to delete the file, but to do this I close the
stream first. I agree a better comment is needed.
Thanks for the detailed feedback. I'll look at making improvements
over the coming days.
> Implement S3 retry mechanism for failed block transfers
> -------------------------------------------------------
>
> Key: HADOOP-997
> URL: https://issues.apache.org/jira/browse/HADOOP-997
> Project: Hadoop
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.11.0
> Reporter: Tom White
> Assigned To: Tom White
> Attachments: HADOOP-997.patch
>
>
> HADOOP-882 improves S3FileSystem so that when certain communications problems
> with S3 occur the operation is retried. However, the retry mechanism cannot
> handle a block transfer failure, since blocks may be very large and we don't
> want to buffer them in memory. This improvement is to write a wrapper (using
> java.lang.reflect.Proxy if possible - see discussion in HADOOP-882) that can
> retry block transfers.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
