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Posted to common-issues@hadoop.apache.org by "Da Zhou (JIRA)" <ji...@apache.org> on 2019/01/10 18:23:00 UTC
[jira] [Reopened] (HADOOP-15662) ABFS: Better exception handling of
DNS errors
[ https://issues.apache.org/jira/browse/HADOOP-15662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Da Zhou reopened HADOOP-15662:
------------------------------
001 patch doesn't handle transient DNS resolution error, it could require manual retry when such things happen.
The more obvious issue in current implementation is that the HostNotFoundException is logged at DEBUG level, so error msg in the long time retry could not be captured by user until DEBUG level is set for the logger.
Will provide a fix so that the error msg is logged at WARN level and make it easier for user to read.
> ABFS: Better exception handling of DNS errors
> ---------------------------------------------
>
> Key: HADOOP-15662
> URL: https://issues.apache.org/jira/browse/HADOOP-15662
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Reporter: Thomas Marquardt
> Assignee: Da Zhou
> Priority: Major
> Fix For: 3.2.1
>
> Attachments: HADOOP-15662-001.patch
>
>
> DNS errors are common during testing due to typos or misconfiguration. They can also occur in production, as some transient DNS issues occur from time to time.
> 1) Let's investigate if we can distinguish between the two and fail fast for the test issues, but continue to have retry logic for the transient DNS issues in production.
> 2) Let's improve the error handling of DNS failures, so the user has an actionable error message.
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