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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2016/10/28 11:50:58 UTC
[jira] [Commented] (HADOOP-13767) Aliyun Connection broken when
idle then 1 minutes or build than 3 hours
[ https://issues.apache.org/jira/browse/HADOOP-13767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15615177#comment-15615177 ]
Steve Loughran commented on HADOOP-13767:
-----------------------------------------
* Is there a stack trace here?
* what was the operation? GET, PUT?
If you look at s3a we treat a failure on a read as something to retry, just re-open as if it was a seek(). Same for a PUT, where, although the AWS library does some retries, it doesn't redo them all. I went for a hard coded retry policy class for backoff retry (see {{S3ABlockOutputStream}}:
{code}
RetryPolicy retryPolicy =
RetryPolicies.retryUpToMaximumCountWithProportionalSleep(
5,
2000,
TimeUnit.MILLISECONDS);
{code}
Hard code to avoid more config options to document and test, while setting things up to make it configurable in future.
Consider also adding a counter of disconnect/reconnects to metrics, as it could be a sign of connectivity issues. And when fielding support calls "why is IO slow", an answer like "your network is unreliable" is a good answer
> Aliyun Connection broken when idle then 1 minutes or build than 3 hours
> -----------------------------------------------------------------------
>
> Key: HADOOP-13767
> URL: https://issues.apache.org/jira/browse/HADOOP-13767
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Affects Versions: 3.0.0-alpha2
> Reporter: Genmao Yu
> Assignee: Genmao Yu
> Fix For: 3.0.0-alpha2
>
>
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