RFR: 8276687: Remove support for JDK 1.4.1 PerfData shared memory files

[David Holmes]

On Thu, 13 Oct 2022 04:06:27 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> We have code in jdk.internal.jvmstat for supporting an ancient version (JDK 1.4.1). There's currently no test case for this code, so it's likely to be further bit-rotten in the future. Let's remove it now.
> 
> If anyone wants to connect to JDK 1.4.1, they can use tools from JDK 19 or earlier.

Looks like a good cleanup. One suggestion/request below if you feel like it.

Thanks.

src/jdk.internal.jvmstat/share/classes/sun/jvmstat/perfdata/monitor/protocol/local/PerfDataFile.java line 94:

> 92:         } catch (NumberFormatException e) { }
> 93: 
> 94:         throw new IllegalArgumentException("file name does not match pattern");

Pre-existing but it would be nice if this actually reported the file and the pattern.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10687