mysql.java

for(PlayerStatBlob pb  : writeCache.values()){
            try {
                prepSetPlayerStat.clearBatch();
                for(PlayerStat ps : pb.getStats()){ //ConcurrentModificationException here

                    prepSetPlayerStat.setString(1, pb.getName());

                    prepSetPlayerStat.setString(2, ps.getCat());
                    prepSetPlayerStat.setString(3, ps.getName());
                    prepSetPlayerStat.setInt(4, ps.getValue());
                    prepSetPlayerStat.setInt(5, ps.getValue());
                    prepSetPlayerStat.addBatch();
                }
                prepSetPlayerStat.executeBatch();
                BeardStat.printDebugCon("Saved.");
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }