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java.lang.NullPointerException at sun.nio.ch.Util$BufferCache.get(Util.java:74) at sun.nio.ch.Util.getTemporaryDirectBuffer(Util.java:144) at sun.nio.ch.IOUtil.read(IOUtil.java:174) at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243) at sun.nio.ch.SocketAdaptor$SocketInputStream.read(SocketAdaptor.java:176) at sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:86) at com.mongodb.DBPort._read(DBPort.java:219) at com.mongodb.DBPort.go(DBPort.java:91) at com.mongodb.DBPort.call(DBPort.java:58) at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:158) at com.mongodb.DBApiLayer$MyCollection.find(DBApiLayer.java:297) at com.mongodb.DBCursor._check(DBCursor.java:253) at com.mongodb.DBCursor._hasNext(DBCursor.java:374) at com.mongodb.DBCursor.hasNext(DBCursor.java:399)