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https://issues.apache.org/jira/browse/HADOOP-18577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-18577.
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Fix Version/s: 3.4.0
3.3.5
Resolution: Fixed
> ABFS: add probes of readahead fix
> ---------------------------------
>
> Key: HADOOP-18577
> URL: https://issues.apache.org/jira/browse/HADOOP-18577
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.3.5
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.5
>
>
> Followup patch as to HADOOP-18456 to
> aid in probing for read correctness of
> hadoop ABFS client across different releases.
> * ReadBufferManager constructor logs the fact it is safe at TRACE
> * AbfsInputStream declares it is fixed in toString()
> by including fs.azure.capability.readahead.safe" in the
> result.
> The ABFS FileSystem hasPathCapability("fs.azure.capability.readahead.safe")
> probe returns true to indicate the client's readahead manager has been fixed
> to be safe when prefetching.
> All Hadoop releases for which probe this returns false
> and for which the probe "fs.capability.etags.available"
> returns true at risk of returning invalid data when reading
> ADLS Gen2/Azure storage data.
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