NPE in ArrayByteBufferPool.findOldestEntry()

[sbordet]

Jetty version(s)
10+

Description

Below the stack trace in 12, but I think the problem may happen in 10/11 too.

java.lang.NullPointerException: Cannot invoke "org.eclipse.jetty.io.ArrayByteBufferPool$Buffer.getLastNanoTime()" because the return value of "org.eclipse.jetty.util.Pool$Entry.getPooled()" is null
        at org.eclipse.jetty.io.ArrayByteBufferPool.lambda$findOldestEntry$6(ArrayByteBufferPool.java:440)
        at java.base/java.util.Comparator.lambda$comparingLong$6043328a$1(Comparator.java:515)
        at java.base/java.util.function.BinaryOperator.lambda$maxBy$1(BinaryOperator.java:74)
        at java.base/java.util.stream.ReduceOps$2ReducingSink.accept(ReduceOps.java:123)
        at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1006)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
        at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:662)
        at java.base/java.util.stream.ReferencePipeline.max(ReferencePipeline.java:698)
        at org.eclipse.jetty.io.ArrayByteBufferPool.findOldestEntry(ArrayByteBufferPool.java:440)
        at org.eclipse.jetty.io.ArrayByteBufferPool.evict(ArrayByteBufferPool.java:393)
        at org.eclipse.jetty.io.ArrayByteBufferPool.releaseExcessMemory(ArrayByteBufferPool.java:370)
        at org.eclipse.jetty.io.ArrayByteBufferPool.acquire(ArrayByteBufferPool.java:207)
        at org.eclipse.jetty.http2.HTTP2Connection$NetworkBuffer.<init>(HTTP2Connection.java:500)
        at org.eclipse.jetty.http2.HTTP2Connection$HTTP2Producer.acquireNetworkBuffer(HTTP2Connection.java:401)
        at org.eclipse.jetty.http2.HTTP2Connection$HTTP2Producer.produce(HTTP2Connection.java:338)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produceTask(AdaptiveExecutionStrategy.java:512)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:258)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:195)
        at org.eclipse.jetty.http2.HTTP2Connection.produce(HTTP2Connection.java:211)
        at org.eclipse.jetty.http2.HTTP2Connection.onFillable(HTTP2Connection.java:158)
        at org.eclipse.jetty.http2.HTTP2Connection$FillableCallback.succeeded(HTTP2Connection.java:449)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
        at org.eclipse.jetty.io.ssl.SslConnection$SslEndPoint.onFillable(SslConnection.java:554)
        at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:373)
        at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:146)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
        at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)
        at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:410)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
        at java.base/java.lang.Thread.run(Thread.java:1623)