Fatal Signal 11 (SIGSEGV), code 1, on Android

private ArrayList<BoardItem>mOriginalList;//Original Data
private ArrayList <BoardItem>mFilterdlList;// filtered data
private ArrayList <BoardItem>mPublishList;// Display data
private ArrayList<FilterItem>mFilterList;//filter data

public void setData(Collection<?extends BoardItem>data){

    synchronized(mLock) {
        mOriginalList.clear();
        mOriginalList.addAll(data);
        filter();
    }

    notifyDataSetChanged();
}

public void clear() {
    synchronized(mLock) {
        mOriginalList.clear();
        filter();
    }
    notifyDataSetChanged();
}

public void addAll (Collection <?extends BoardItem>items) {
    synchronized(mLock) {
        mOriginalList.addAll(items);
        filter();
    }
    notifyDataSetChanged();
}

/**
 * Set FilterItem to the adapter to reflect the filter.
 * 
 * @param filterItems
 */
public void setFilterItems(ArrayList<FilterItem>filterItems){
    Log.d(TAG, "setFilterItems";
    synchronized(mLock) {
        mFilterList.clear();
        mFilterList.addAll(filterItems);
        filter();
    }

    notifyDataSetChanged();
}

/**
 * Set FilterItem to the adapter to reflect the filter.
 * 
 * @param filterItems
 */
public void addFilterItem(FilterItemfilter){
    Log.d(TAG, "addFilterItem";
    synchronized(mLock) {
        mFilterList.clear();
        mFilterList.add(filter);
        filter();
    }

    notifyDataSetChanged();
}

/**
 * Filter by time constraint (one second before release)
 */
private void filterByTime() {
    // time-limited filter
    ArrayList<BoardItem>filteredList=newArrayList<>();
    ArrayList<BoardItem>copyList=null;

    copyList = new ArrayList <(mFilterdlList);

    for (Iterator<BoardItem>ite=copyList.iterator();ite.hasNext();){
        BoardItem boardItem=(BoardItem)ite.next();
        // Current date and time
        Calendar nowcal=Calendar.getInstance();
        // comparison target date and time
        Calendar dateCal=Calendar.getInstance();
        try{
            dateCal.setTime(mSimpleDateFormat.parse(boardItem.getPublicDate()));
        } catch(ParseExceptione){
            e.printStackTrace();
        }
        // Long type difference in milliseconds
        long diffTime = nowcal.getTimeInMillis() - dateCal.getTimeInMillis();
        if(diffTime>-1000){
            filterdList.add(boardItem);
        }
    }
    mPublishList=filterdList;
}

/**
 * Perform filter operations
 */
private void filter() {

    ArrayList<FilterItem>filterList=null;

    filterList = new ArrayList <>(mFilterList);

    if(filterList.size()==0){
        mFilterdlList = new ArrayList <> (mOriginalList);
        filterByTime();
        return;
    }

    ArrayList<BoardItem>filteredList=newArrayList<>();
    ArrayList<BoardItem>copyList=null;

    copyList = new ArrayList <>(mOriginalList);

    BoardItem: for (Iterator<BoardItem>ite=copyList.iterator();ite.hasNext();){
        BoardItem item=(BoardItem)ite.next();
        for (Iterator<FilterItem>iteFilter=filterList.iterator();iteFilter.hasNext();){
            FilterItem filterItem=(FilterItem)iteFilter.next();
            if(filterItem.isSelected()){
                if(filterItem.match(item.get(filterItem.getGroupName())))){
                    filterdList.add(item);
                    breakBoardItem;
                }
            }
        }
    }

    mFilterdlList = filterdList;

    filterByTime();
    return;
}