Java's DNS cache

[EricF]

The morning started with a too early morning call - my application's reverse
DNS lookups were all failing. There was a network "hiccup" the night before.
We ended up restarting the server and everything was fine.

It turns out that Java by default caches all failed DNS lookups with no
expiration. I think this is a very bad idea.

I came across this blog while researching the issue ...

http://www.burnthacker.com/articles/search?q=dns

Eric

 

[Roedy Green]

I came across this blog while researching the issue ...

http://www.burnthacker.com/articles/search?q=dns

I think that is out of date. the failed cache DNS lookup defaults to
10 seconds now.