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The internal
java.io.DeleteOnExitHook
uses aLinkedHashSet
of paths to delete files at when the JVM exits. However, since there is no way to remove entries from the set, it leaks memory when callingdeleteOnExit()
for every new temp file created byFileManager.saveToFile
. To avoid this, try to reuse temp file names (using one perFileManager
instance).FileManager.saveToFile
appears to be called on average around every 2s, and this probably leaks around 36 + length * 2 bytes for the String object, 36 bytes for the hashtable node and maybe around 10 bytes for the table entry, or 82 + length * 2 ~= 236 bytes for a typical temp file path length on Windows - about 10MB per day.