Steve Loughran created HADOOP-14551:
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Summary: F3A init hangs if you try to connect while the system is
offline
Key: HADOOP-14551
URL: https://issues.apache.org/jira/browse/HADOOP-14551
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 2.9.0
Reporter: Steve Loughran
Priority: Minor
F3A init hangs if you try to connect while the system is offline (that is: the
nost of the s3 endpoint is unknown)
Assumption: unknown host exception is considered recoverable & client is
spinning for a long time waiting for it.
I think we can conclude that unknown host is unrecoverable: if DNS is in
trouble, you are doomed.
Proposed: quick lookup of endpoint addr, fail with our wiki diagnostics error
on any problem.
I don't see any cost in doing this, as it will guarantee that the endpoint is
cached in the JVM ready for the AWS client connection. If it can't be found,
we'll fail within 20+s with something meaningful.
Noticed during a test run: laptop wifi off; all NICs other than loopback are
inactive.
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