SPIKE: It is not possible to run two or more data-import processes simultaneously

Job executions just hang or break unexpectedly.
Some time exceptions like this can be found in the mod-data-import log

[9000722eqId] Thread Thread[processing-files-thread-pool-9,5,main]=Thread[processing-files-thread-pool-9,5,main] has been blocked for 2904269 ms, time limit is 60000 ms
io.vertx.core.VertxException: Thread blocked
at sun.misc.Unsafe.park(Native Method) ~[?:1.8.0_222]
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) ~[?:1.8.0_222]
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) ~[?:1.8.0_222]
at java.util.concurrent.ArrayBlockingQueue.put(ArrayBlockingQueue.java:353) ~[?:1.8.0_222]
at org.folio.service.processing.coordinator.QueuedBlockingCoordinator.acceptLock(QueuedBlockingCoordinator.java:29) ~[mod-data-import-fat.jar:?]
at org.folio.service.processing.ParallelFileChunkingProcessor.processFile(ParallelFileChunkingProcessor.java:164) ~[mod-data-import-fat.jar:?]
at org.folio.service.processing.ParallelFileChunkingProcessor.lambda$null$7(ParallelFileChunkingProcessor.java:116) ~[mod-data-import-fat.jar:?]
at org.folio.service.processing.ParallelFileChunkingProcessor$$Lambda$319/2023107181.handle(Unknown Source) ~[?:?]
at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:316) ~[mod-data-import-fat.jar:?]
at io.vertx.core.impl.ContextImpl$$Lambda$64/1244502316.run(Unknown Source) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_222]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[mod-data-import-fat.jar:?]
at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_222]