[JENKINS] Solr-main-Linux (64bit/jdk-11.0.15) - Build # 6117 - Still unstable!

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Build: https://jenkins.thetaphi.de/job/Solr-main-Linux/6117/
Java: 64bit/jdk-11.0.15 -XX:+UseCompressedOops -XX:+UseConcMarkSweepGC

1 tests failed.
FAILED:  org.apache.solr.util.OrderedExecutorTest.classMethod

Error Message:
com.carrotsearch.randomizedtesting.ThreadLeakError: 1 thread leaked from SUITE 
scope at org.apache.solr.util.OrderedExecutorTest: 
   1) Thread[id=520, name=testLockWhenQueueIsFull_control-299-thread-1, 
state=RUNNABLE, group=TGRP-OrderedExecutorTest]
        at java.base@11.0.15/jdk.internal.misc.Unsafe.unpark(Native Method)
        at 
java.base@11.0.15/java.util.concurrent.locks.LockSupport.unpark(LockSupport.java:160)
        at 
java.base@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer.unparkSuccessor(AbstractQueuedSynchronizer.java:709)
        at 
java.base@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1305)
        at 
java.base@11.0.15/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:439)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.tryTerminate(ThreadPoolExecutor.java:726)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExecutor.java:994)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base@11.0.15/java.lang.Thread.run(Thread.java:829)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 1 thread leaked from SUITE 
scope at org.apache.solr.util.OrderedExecutorTest: 
   1) Thread[id=520, name=testLockWhenQueueIsFull_control-299-thread-1, 
state=RUNNABLE, group=TGRP-OrderedExecutorTest]
        at java.base@11.0.15/jdk.internal.misc.Unsafe.unpark(Native Method)
        at 
java.base@11.0.15/java.util.concurrent.locks.LockSupport.unpark(LockSupport.java:160)
        at 
java.base@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer.unparkSuccessor(AbstractQueuedSynchronizer.java:709)
        at 
java.base@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1305)
        at 
java.base@11.0.15/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:439)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.tryTerminate(ThreadPoolExecutor.java:726)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExecutor.java:994)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.base@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base@11.0.15/java.lang.Thread.run(Thread.java:829)
        at __randomizedtesting.SeedInfo.seed([E5E135D6996EDB0]:0)