James Clampffer created HDFS-11294:
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Summary: libhdfs++: Segfault in HA failover if DNS lookup for both
Namenodes fails
Key: HDFS-11294
URL: https://issues.apache.org/jira/browse/HDFS-11294
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: James Clampffer
Assignee: James Clampffer
Hit while doing more manual testing on HDFS-11028.
The HANamenodeTracker takes an asio endpoint to figure out what endpoint on the
other node to try next during a failover. This is done by passing the element
at index 0 from endpoints (a std::vector<asio endpoint>).
When DNS fails the endpoints vector for that node will be empty so the iterator
returned by endpoints\[0\] is just a null pointer that gets dereferenced and
causes a segfault.
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