[CI] integTestCluster#wait fails on Windows

[elasticmachine]

Original comment by @DaveCTurner:

LINK REDACTED

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All of the above failed in a relatively short time with the message

Execution failed for task ':x-pack-elasticsearch:plugin:integTestCluster#wait'.

I'm afraid the logs are not very meaningful to me. The first bad-looking message seems to be

|    ERROR: Temporary file directory [C:\Users\JENKIN~1.WOR\AppData\Local\Temp\elasticsearch] does not exist or is not accessible

This is strange as this directory seems to exist and be accessible to the Jenkins service user.

[elasticmachine]

Original comment by @droberts195:

The error message is the one that was added in #28217.

If this error had occurred on every Windows build since that PR was merged then I'd say this issue was a blocker for release of 6.3. However, quite a few Windows CI builds have succeeded since then, and this particular problem has only occurred repeatedly in the last day or so. The working directory for the tests in CI has been changed recently, so it could be related to that. If the temp directory is being created in parallel with running Elasticsearch then the new check is doing its job and the fix will be to change the CI setup.

I will investigate further.

[elasticmachine]

Original comment by @droberts195:

I had a look to see if this is still happening and the build after the most recent failure listed in the description succeeded:

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However, two builds later this Jenkins job started failing due to being unable to find Java. Then that was fixed, but all subsequent builds failed due to being unable to find Git.

I raised LINK REDACTED to get the current problem with Git resolved. Once that's done I'll check whether the temp directory is a problem again. But it's clear that there's been considerable churn in the scripts used to set up the Jenkins workers recently, and hopefully that was the reason behind the failure this issue was raised for rather than some problem with the Java code.

[jasontedor]

Relates #30325

[jasontedor]

This does not appear to be happening anymore.