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https://issues.apache.org/jira/browse/HADOOP-12353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15146008#comment-15146008
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Thomas Demoor commented on HADOOP-12353:
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[[email protected]]: s3a does retry as the AWS SDK has a default exponential
backoff retry policy that retries IO, HTTP 5xx,
..(http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/ClientConfiguration.html#DEFAULT_RETRY_POLICY).
We could make this configurable.
[~raviprak]: You make a valid point but s3n is unmaintained code that's planned
to be deprecated (people are focusing on s3a). A previous harmless-looking s3n
patch broke things in an unexpected way hence I understand
[[email protected]]'s point as well. He didn't -1 the patch, he simply doesn't
want to be held responsible if it breaks things, but someone else might.
> S3 Native filesystem does not retry all connection failures
> -----------------------------------------------------------
>
> Key: HADOOP-12353
> URL: https://issues.apache.org/jira/browse/HADOOP-12353
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 2.7.1
> Reporter: Mariusz Strzelecki
> Assignee: Mariusz Strzelecki
> Priority: Minor
> Attachments: HADOOP-12353.001.patch, HADOOP-12353.002.patch
>
>
> Current implementation of NativeS3FileSystem.java uses RetryProxy that
> retries exceptions that may occur on network communication with S3 API, but
> these exceptions must be exact instances of IOException:
> https://github.com/apache/hadoop/blob/master/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java#L349
> Our tests show that HttpClient throws IOException subclasses which are not
> handled by Proxy.
> Additionally, not all methods that call S3 API are listed to be handled, i.e.
> storeEmptyFile and retrieveMetadata are missing.
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