RFR: 8304885: Reuse stale data to improve DNS resolver resiliency [v11]

[Sergey Bylokhov]

On Mon, 29 May 2023 16:11:36 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> src/java.base/share/classes/java/net/doc-files/net-properties.html line 277:
>> 
>>> 275: 	A value of 0 (zero) or if the property is not set means do not use stale
>>> 276: 	names, the negative value is ignored.
>>> 277: 	The default value is implementation-specific.</P>
>> 
>> Maybe we should say that the default value is 0 since this is what is documented in `java.security`
>
> In the "java.security" file we documented the default value of the property in that file but it is commented out. Right now the new property specified in the same way as the old "networkaddress.cache.ttl", see [net-properties.html](https://github.com/openjdk/jdk/pull/13285/files/ce595f74f511553274c9da254d53b368abe44408#diff-21ffe1f9a665c0f70cc9888d2da937a2a77fadfdacc23d0bd59506595e668c5fR267) and [InetAddress.java](https://github.com/openjdk/jdk/pull/13285/files/a856cd36eba1efacbc0f95918ac6aa2712cab870#diff-55d4acc64110543896bf6c289d6247cded986edfe9ccce3a9bca88a197711d58R204)

In the [InetAddress.java](https://github.com/openjdk/jdk/pull/13285/files/a856cd36eba1efacbc0f95918ac6aa2712cab870#diff-55d4acc64110543896bf6c289d6247cded986edfe9ccce3a9bca88a197711d58R204)

 * <dt><b>networkaddress.cache.ttl</b></dt>
 * <dd>Indicates the caching policy for successful name lookups from
 * the name service. The value is specified as an integer to indicate
 * the number of seconds to cache the successful lookup. The default
 * setting is to cache for an implementation specific period of time.

In the [java.security](https://github.com/openjdk/jdk/pull/13285/files/ce595f74f511553274c9da254d53b368abe44408#diff-)

# default value is forever (FOREVER). For security reasons, this
# caching is made forever when a security manager is set. When a security
# manager is not set, the default behavior in this implementation
# is to cache for 30 seconds.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13285#discussion_r1209446262