不停的实例化对象导致OOM
2024-08-24 10:06:11
使用axis调用webService,系统运行一段时间后,出现了 OOM,还好日志中 记下了错误信息。
Exception in thread "Thread-1301" java.lang.OutOfMemoryError: Java heap space
at org.apache.xerces.dom.DeferredDocumentImpl.createChunk(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.ensureCapacity(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.createNode(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.createDeferredDocument(Unknown Source)
at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source)
at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:369)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:388)
at org.apache.axis.configuration.FileProvider.configureEngine(FileProvider.java:179)
at org.apache.axis.AxisEngine.init(AxisEngine.java:172)
at org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
at org.apache.axis.client.AxisClient.<init>(AxisClient.java:52)
at org.apache.axis.client.Service.getAxisClient(Service.java:104)
at org.apache.axis.client.Service.<init>(Service.java:113)
at catic.hotel.server.webservice.PmsServiceData.<init>(PmsServiceData.java:26)
at catic.hotel.server.task.SendCmdTask.<init>(SendCmdTask.java:200)
at catic.hotel.server.task.TaskFactory.getTask(TaskFactory.java:155)
at catic.hotel.server.server.ReadData.read(ReadData.java:82)
at catic.hotel.server.server.ReadData.run(ReadData.java:57)
由于系统会频繁的进入到 SendCmdTask,而我又在此构造方法中不停的new PmsServiceData(),而PmsService的无参构造方法中又new Service(),相当于导致了Service对象不停的被实例化,时间久了,则出现OOM。
解决方法:
对PmsServiceData使用单例模式,即:
private static PmsServiceData pmsServiceData = null; // 单例
public static synchronized PmsServiceData getInstance(){
if(null == pmsServiceData){
pmsServiceData = new PmsServiceData();
}
return pmsServiceData;
}
问题解决。
最新文章
- 众人口中的JAVASCRIPT
- jquery的$.ajax async使用详解
- JS常用的腳本庫--包括在線編輯器
- Fixflow引擎解析(二)(模型) - BPMN2.0读写
- XCode实用好用插件集锦
- java数据类型和运算优先级
- [Java] Java IO Files
- C++ Primer 学习笔记_53_类和数据抽象 --友元、static员
- java 中关于json的使用方法
- wildfly 如何设置外网访问
- Hibernate三种状态及生命周期
- docker~大叔对术语的解释
- C#读取OPC server
- php yii 命令
- hadoop和spark相关参数的配置
- Masonry 适配label多行
- 4.6 Routing -- Rendering A Tempalte
- SpringBoot Session 管理及集群管理
- MySQL 视图、触发器、函数、存储过程
- openresty package.path require 报错