RFR: JDK-8324930: java/lang/StringBuilder problem with concurrent jtreg runs

[Jaikiran Pai]

On Tue, 30 Jan 2024 09:08:28 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> On some Windows machines we see sometimes OOM errors because of high resource (memory/swap) consumption. This is especially seen when the jtreg runs have higher concurrency. A solution is to put the java/lang/StringBuilder tests in the exclusiveAccess.dirs group so that they are not executed concurrently, which helps to mitigate the resource shortages.
> Of course this has the downside that on very large machines the concurrent execution is not done any more.

Hello Matthias, would you be able to include a stacktrace from one such failure? The tests you mention as failing:


java/lang/StringBuilder/StringBufferRepeat.java
java/lang/StringBuilder/CompactStringBuilderSerialization.java
java/lang/StringBuilder/Insert.java

are all "othervm" tests, so I'm curious what kind of OOM is being reported.

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PR Comment: https://git.openjdk.org/jdk/pull/17625#issuecomment-1925764255