Allow applications to know that a read failed beucase block is missing
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Key: HDFS-532
URL: https://issues.apache.org/jira/browse/HDFS-532
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: dhruba borthakur
Assignee: dhruba borthakur
I have an application that has intelligence to retrieve data from alternate
locations if HDFS cannot provide this data. This can happen when data in HDFS
is corrupted or the block is missing. HDFS already throws ChecksumException if
the block is corrupted and throws a generic IOException if the block is
missing. I would like HDFS to throw BlockMissingException when a read request
encounters a block that has no locations associated with it.
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