SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "Thread-0" java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
	at java.util.HashMap$KeyIterator.next(HashMap.java:1469)
	at java.util.AbstractCollection.addAll(AbstractCollection.java:343)
	at org.apache.jackrabbit.oak.segment.remote.queue.SegmentWriteQueueTest.lambda$testFlush$4(SegmentWriteQueueTest.java:165)
	at java.lang.Thread.run(Thread.java:748)