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  1. Hadoop HDFS
  2. HDFS-3656

ZKFC may write a null "breadcrumb" znode

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 2.0.0-alpha
    • Fix Version/s: None
    • Component/s: auto-failover
    • Labels:
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      Description

      A user reported 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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