Thomas Jackson created TS-4682:
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Summary: HostDB caching of SOA responses doesn't honor TTL
Key: TS-4682
URL: https://issues.apache.org/jira/browse/TS-4682
Project: Traffic Server
Issue Type: Bug
Reporter: Thomas Jackson
HostDB categorizes all DNS responses as "failed" and "not failed", "failed"
being any response that doesn't have an answer to the question sent. This means
that SOA responses are considered "failed" and therefore the response isn't
cached for the TTL defined in the SOA record. "failed" responses TTL are
configured by "proxy.config.hostdb.fail.timeout" (default to 0). With the value
set to default the record will be immediately considered stale and require a
lookup. To fix this we should have the "failed" response honor the TTL if the
response had a TTL defined.
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