Minor Description
If the download fails, the threads created by the Pipeline strategy are not all being correctly shutdown, some of them may be left behind. As they are all daemon threads, they will not prevent the JVM from shutting down. But when they are forcibly closed at the JVM shutdown, they print in the logs several exceptions (connections closed abruptly, trying to access objects that were already closed) that are confusing and distract from the root cause of the problem.
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