Steve Loughran created HADOOP-18577:
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Summary: 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
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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