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Mar 23, 2018
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Add note to low-level client docs for DNS caching #29213

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Add note to low-level client docs for DNS caching
jasontedor Mar 22, 2018
54bda4e
Slight reword
jasontedor Mar 22, 2018
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13 changes: 13 additions & 0 deletions docs/java-rest/low-level/configuration.asciidoc
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Expand Up @@ -86,3 +86,16 @@ will be used.

For any other required configuration needed, the Apache HttpAsyncClient docs
should be consulted: https://hc.apache.org/httpcomponents-asyncclient-4.1.x/ .

NOTE: If your application runs under the security manager you might be subject
to the JVM default policies of caching positive hostname resolutions
indefinitely and negative hostname resolutions for ten seconds. If the resolved
addresses of the hosts to which you are connecting the client to vary with time
then you might want to modify the default JVM behavior. These can be modified by
adding
http://docs.oracle.com/javase/8/docs/technotes/guides/net/properties.html[`networkaddress.cache.ttl=<timeout>`]
and
http://docs.oracle.com/javase/8/docs/technotes/guides/net/properties.html[`networkaddress.cache.negative.ttl=<timeout>`]
to your
http://docs.oracle.com/javase/8/docs/technotes/guides/security/PolicyFiles.html[Java
security policy].