applications/microbenchmarks/api/Test.java#id329,[tier5],[linux-x64-debug] failed in tier5 run.

The logfile has:
----------System.err:(59/4081)----------
 stdout: [# WARNING: Unable to acquire the JMH lock (/tmp/jmh.lock): already taken by another JMH instance, ignored by user's request.

and some

# Benchmark mode: Throughput, ops/time
# Benchmark: oracle.micro.benchmarks.api.java.util.ArraysEquals.testByteArrayEqualsTrue

];
 stderr: [Exception in thread "process reaper" java.lang.StackOverflowError
at java.base/java.util.concurrent.ConcurrentHashMap.fullAddCount(ConcurrentHashMap.java:2591)

and then

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class java.util.Random
at java.base/java.io.File$TempDirectory.<clinit>(File.java:1916)
at java.base/java.io.File.createTempFile(File.java:2072)
at java.base/java.io.File.createTempFile(File.java:2136)
at org.openjdk.jmh.util.FileUtils.tempFile(FileUtils.java:43)
at org.openjdk.jmh.util.FileUtils.createTempFileWithLines(FileUtils.java:83)

Which looks like an intermittent test execution error, but I've seen this multiple times.