From java at elyograg.org  Wed Oct 12 14:08:16 2022
From: java at elyograg.org (Shawn Heisey)
Date: Wed, 12 Oct 2022 08:08:16 -0600
Subject: Is the crash file path available from the JVM?
Message-ID: <1e83fc17-e60e-a18e-7a60-d72db5081062@elyograg.org>

I am working on changing the Solr project from using a shell script to 
kill Solr on OOME to crashing the JVM on OOME.

https://issues.apache.org/jira/browse/SOLR-8803

This is part of the code I am currently working on adding:

 ??? long pid = 0L;
 ??? try {
 ????? pid = ProcessHandle.current().pid();
 ??? } catch (Exception e) {
 ????? if (log.isErrorEnabled()) {
 ??????? log.error("Error trying to get PID.", e);
 ????? }
 ??? }
 ??? if (log.isWarnEnabled()) {
 ????? String tmpDir = System.getProperty("java.io.tmpdir");
 ????? if (pid == 0L) {
 ??????? log.warn("Java tmpdir:");
 ??????? log.warn(tmpDir);
 ????? } else {
 ??????? StringBuilder sb = new StringBuilder();
 ??????? sb.append(tmpDir);
 ??????? sb.append(FileSystems.getDefault().getSeparator());
 ??????? sb.append("hs_err_pid");
 ??????? sb.append(pid);
 ??????? sb.append(".log");
 ??????? String crashFile = sb.toString();
 ??????? log.warn("Java crash file location:");
 ??????? log.warn(crashFile);
 ????? }
 ??? }

But what I am hoping is to be able to ask Java for the fully qualified 
crash file path and remove the "manageProcess" permission I had to add 
to the security manager in order to get the PID.? Is the crash file path 
available without adding permissions to the security manager?? I have 
been searching and haven't found anything.

I know this isn't exactly on-topic for this particular mailing list, but 
it is related to OOME, so it sort of fits.? I didn't want to add yet 
another mailing list for a one-off question.

Thanks,
Shawn