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java.lang.OutOfMemoryError: Java heap space	at java.util.Arrays.copyOfRange(Arrays.java:3209)	at java.lang.String.init(String.java:216)	at java.lang.StringBuilder.toString(StringBuilder.java:430)	at net.sourceforge.retriever.fetcher.HTTPFetcher.getInnerURLs(Unknown Source)	at net.sourceforge.retriever.fetcher.Fetcher.fetch(Unknown Source)	at net.sourceforge.retriever.URLParser.run(Unknown Source)	at net.sourceforge.retriever.ThreadPool$RunnableHandler.run(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)	at java.lang.Thread.run(Thread.java:619)