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java.lang.OutOfMemoryError: Java heap space	at java.util.ArrayList.(Unknown Source)	at com.persistit.CleanupManager.poll(CleanupManager.java:166)	at com.persistit.CleanupManager.runTask(CleanupManager.java:88)	at com.persistit.IOTaskRunnable.run(IOTaskRunnable.java:144)	at java.lang.Thread.run(Unknown Source)