kaka11chen commented on issue #7508: Druid historical node running caused os kernel creating too many kernel's dentry cache slab objects. URL: https://github.com/apache/incubator-druid/issues/7508#issuecomment-484757430 The following is a simple test which can reproduce the issue. `public class Test { public static void main(String args[]) { for(;;) { final File temporaryStorageDirectory = new File( "/tmp", "druid-groupBy-" + UUID.randomUUID()) ); temporaryStorageDirectory.exists(); } } }`
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