使用set出现问题，size有时变为0

2014-07-04 05:04:51 160 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Private Bytes、Working Set、Virtual Size 的区别进程占用内存、进程申请的内存和进程所依赖的动态库申请的内存总和，不包括进程所依赖的动态库占用的内存、mmap的内存。不一定在物理内存上，可以被交换到磁盘上，所以可以比Working Set大。由于也包括进程依赖动态库所申请的内存，所以不能判断内存泄漏是由进程导致的还是动态库导致的。阅读详情

在for循环中显示set的size，没有问题，随着数据增加size也增加，
但是后面那条size就变为0了，这是为什么？
关键是还不是所有数据都这样



while ((s1 = br.readLine()) != null)

		{

			Set<String> usrSet = new HashSet<String>();

			try

			{

			LOG.info("[INFO] The "+count+" ID.");

			count++;

			

				// 获取一个用户id

				String id = s1;

				// 根据id获取用户行为记录

				HashMap<String, String> usrlog_hashmap = new HashMap<String, String>();

				usrlog_hashmap = logDBOperation.queryUserIDInDateRange(id, timeStamp, 7);//logDBOperation.queryByUsrID(id);//queryUserIDInDateRange(id, "2014061900000", 500);//;queryUserIDInDateRange

				int tempcount = 0;

				// 循环读取用户行为

				for (Entry<String, String> entry : usrlog_hashmap.entrySet())

				{

					//System.out.println(entry.getValue() + "\n");

					String[] usrlog = entry.getValue().split("!");

					for(String tem : usrlog)

					{

						//System.out.println(tem + "\n");

						tempcount++;

						countUserLog++;

						//匹配

						Matcher matcher = pattern.matcher(tem);

						if(matcher.find())

						{

							//System.out.println(tem + "\n");

							countUsefulLog++;

							String postid = matcher.group(1);

							String leftStr = matcher.group(2);

							//System.out.println("postid "+postid);

							Item item = null;

							boolean flag = true;

							while(flag)

							{

								try

								{

									item = itemop.get(postid);

		

									flag = false;

								}

								catch(Exception e)

								{

									LOG.error("[ERROR] Get item failed.");

									continue;

								}

							}

							

							String channel = "";

							

								

							try{

								channel = channelsParser.getInstance(ItemOperation.ItemType.APPITEM).getTransChannelByItem(item,0);

	

							}	

							catch(java.lang.NoClassDefFoundError e)

							{

								LOG.error("[ERROR] Get channel failed.");

								continue;

							}

							if(channel == null || channel == "" || channel == " ")

							{

								Matcher matcher1 = pattern1.matcher(leftStr);

								if(matcher1.find())

								{

										channel = matcher1.group(1);

										System.out.println("channel: "+channel);	

										countref++;

								}

							}

								//System.out.println("channel: "+channel);	

							String[] row = channel.split("-");

							for(int i = 1; i < row.length; i++)

							{

								row[i] = row[i-1]+"-"+row[i];

							}

							

							for(int j = 0; j < row.length; j++)

							{

								System.out.println("row[j] "+ row[j]);

								usrSet.add(row[j]);

								System.out.println("usrSet.size() "+usrSet.size());

							}

							//String[] channelclass = channel.split("/");

						}

					}

					

				}

				System.out.println("usrSet.size() "+usrSet.size());

				

			}

				catch(Exception e)

				{

					LOG.error("Something wrong with me.");

					continue;

				}

		}