On Thu, 11 Jun 2026 03:09:28 GMT, David Holmes <[email protected]> wrote:

>> Yes, we can.  I added this because it failed in my local testing.
>
> So my point is: what is the true limit here? If this must be UNIX_PATH_MAX 
> because we still use sockets in the attach mechanism (ref Solaris doors) then 
> allowing the user-defined tmp dir here is risky, unless we constrain 
> `AltTempDir` to a much shorter value < UNIX_PATH_MAX.

The JVM can write hsperfdata to a directory that's > 108 UNIX_PATH_MAX 
characters long, and jps can read it.  The attach api uses a socket file 
length.  Maybe it makes sense to limit both, which should only be a problem 
with too long AltTempDir.

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PR Review Comment: https://git.openjdk.org/jdk/pull/31407#discussion_r3399283627

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