com.mongodb.DBPortPool$ConnectionWaitTimeOut: Connection wait timeout after 120000 ms
        at com.mongodb.DBPortPool.get(DBPortPool.java:186)
        at com.mongodb.DBTCPConnector$MyPort.get(DBTCPConnector.java:370)
        at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:212)
        at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:305)
        at com.mongodb.DBCursor._check(DBCursor.java:369)
        at com.mongodb.DBCursor._hasNext(DBCursor.java:498)
        at com.mongodb.DBCursor.hasNext(DBCursor.java:523)