RFR: 8350545: Several sun/management/jdp tests fails java.net.SocketException

[SendaoYan]

On Sun, 23 Feb 2025 12:46:53 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Hi all,
>> 
>> Four sun/management/jdp tests fails "java.net.SocketException: No such device" on some machines. The machine cannot connect to the Internet directly and needs to be connected to the Internet through a jump machine. The sun/management/jdp tests report "java.net.SocketException: No such device" failure do not caused by JVM bug but environmentalk issue, so this PR match the output and throw `jtreg.SkippedException` instead of report test fails.
>> 
>> Change has been verified locally, test-fix only and make tests more robustness, no risk.
>
> test/jdk/sun/management/jdp/DynamicLauncher.java line 66:
> 
>> 64:         if (output.contains("java.net.SocketException: No such device")) {
>> 65:             throw new SkippedException("Network setup issue, skip this test");
>> 66:         }
> 
> Something else isn't right if you are getting this error so I think further investigation is required to see if the issue is the test choosing the wrong interface or address, or a configuration issue on the test system.

The tested address:port is hard code to '224.0.23.178:7095' by file test/jdk/sun/management/jdp/ClientConnection.java. This address:port work normally on most machines, but cannot work on machine which can not connect to the internet directly.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23738#discussion_r1966784435