Todd Lipcon created HDFS-3656:
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Summary: ZKFC may write a null "breadcrumb" znode
Key: HDFS-3656
URL: https://issues.apache.org/jira/browse/HDFS-3656
Project: Hadoop HDFS
Issue Type: Bug
Components: auto-failover
Affects Versions: 2.0.0-alpha
Reporter: Todd Lipcon
A user [reported|https://issues.cloudera.org/browse/DISTRO-412] an NPE trying
to read the "breadcrumb" znode in the failover controller. This happened
repeatedly, implying that an earlier process set the znode to null - probably
some race, though I don't see anything obvious in the code.
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