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https://issues.apache.org/jira/browse/HADOOP-15643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16619144#comment-16619144
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Steve Loughran commented on HADOOP-15643:
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Generally you find out when HBase complains about problems.
* {{CanUnbuffer}}
* {{HasEnhancedByteBufferAccess}}
* {{ByteBufferReadable}} -Apache Beam likes this
* {{CanSetDropBehind}}
HBase has a habit of picking up stuff from the HDFS implementation, getting it
pulled up to the filesystem package in hadoop-common and then using it, or just
having expectations about semantics and thread-safety guarantees which come
implicitly from HDFS rather than any explicit decision.
Moving to phase II as these issues will surface in the wild...
> Review/implement ABFS support for the extra fs ops which some apps (HBase)
> expects
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-15643
> URL: https://issues.apache.org/jira/browse/HADOOP-15643
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: HADOOP-15407
> Reporter: Steve Loughran
> Priority: Major
>
> One troublespot with storage connectors is those apps which expect rarer
> APIs, e.g. Beam and ByteBufferReadable ( BEAM-2790), HBase and CanUnbuffer
> (HADOOP-14748).
> Review ABFS support with these, decide which to implement, and if not, make
> sure that the callers can handle that
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