c67c2b7569
This addresses HADOOP-18521, "ABFS ReadBufferManager buffer sharing across concurrent HTTP requests" by not trying to cancel in progress reads. It supercedes HADOOP-18528, which disables the prefetching. If that patch is applied *after* this one, prefetching will be disabled. As well as changing the default value in the code, core-default.xml is updated to set fs.azure.enable.readahead = true As a result, if Configuration.get("fs.azure.enable.readahead") returns a non-null value, then it can be inferred that it was set in or core-default.xml (the fix is present) or in core-site.xml (someone asked for it). Contributed by Pranav Saxena. |
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