[hbase] Data loss if Exception happens between snapshot and flush to disk.
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Key: HADOOP-1903
URL: https://issues.apache.org/jira/browse/HADOOP-1903
Project: Hadoop
Issue Type: Bug
Reporter: stack
There exists a little window during which we can lose data. During a memcache
flush, we make an inmemory copy, a 'snapshot'. The memcache is then zeroed and
off we go again taking updates. Meantime, in background we are supposed to
flush the snapshot to disk. If this process is interrupted -- e.g. the HDFS is
yanked from under us or if an OOME occurs in this thread -- then the content of
the snapshot is lost.
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