Implement dns cache with asynchronous update. #5857
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dbms/src/Common/DNSResolver.cpp
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| { | ||
| updated |= updateHost(host); | ||
| } | ||
| catch (const Poco::Net::NetException &) {} |
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Why not to log the error?
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I think, there will be too many such errors in log.
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I still think that failure in DNS resolution should be logged. Let's look.
Also please add ProfileEvent.
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For changelog. Remove if this is non-significant change.
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Short description (up to few sentences):
Implement DNS cache with asynchronous update. Separate thread resolves all hosts and updates DNS cache with period (setting
dns_cache_update_period). It should help, when ip of hosts changes frequently.Detailed description (optional):
#5414