技术支持项目

问题发现：

有问题的构建版本号：sp6 202104121818

AASv9在运行时，工作线程cpu占用一直处于100%，并且不会恢复，当工作线程到达最大线程数后，应用无法访问。通过对比测试，2020年8月份的apusic.jar未发现此问题。

经分析发现是jsp存在自定义标签，会有多次写操作，每次写后会中断http连接。由于写操作中存在逻辑错误，造成HttpWriter无限循环写，造成cpu100%。

jstack打印堆栈，工作线程的堆栈显示如下。

"HTTPHandler-47-137" #137 prio=5 os_prio=0 tid=0x0000fffd4c034000 nid=0x1fa3 runnable [0x0000fffbfb1fd000]
   java.lang.Thread.State: RUNNABLE
    at sun.nio.cs.ext.DoubleByte$Encoder.encodeLoop(DoubleByte.java:617)
    at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)
    at com.apusic.web.http.HttpWriter$StreamWriter.implWrite(HttpWriter.java:516)
    at com.apusic.web.http.HttpWriter.write(HttpWriter.java:206)
    at java.io.PrintWriter.write(PrintWriter.java:426)
    - locked <0x000000040fd14e10> (a com.apusic.web.http.HttpWriter$StreamWriter)
    at com.apusic.web.jsp.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:110)
    at com.apusic.web.jsp.runtime.JspWriterImpl.release(JspWriterImpl.java:260)
    at com.apusic.web.jsp.runtime.PageContextImpl.release(PageContextImpl.java:100)
    at com.apusic.web.jsp.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:42)
    at _jspx._riseoffice._default._NewInstance__jsp._jspService(_NewInstance__jsp.java:119)
    at com.apusic.web.jsp.runtime.HttpJspPageImpl.service(HttpJspPageImpl.java:40)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at com.apusic.web.container.ServletComponent.service(ServletComponent.java:87)
    at com.apusic.web.container.WebContainer.invoke(WebContainer.java:1171)
    at com.apusic.web.container.WebContainer.invoke(WebContainer.java:1039)
    at com.apusic.web.jsp.JspServlet.service(JspServlet.java:338)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at com.apusic.web.container.ServletComponent.service(ServletComponent.java:87)
    at com.apusic.web.container.WebContainer.invoke(WebContainer.java:1171)
    at com.apusic.web.container.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:106)
    at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
    at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)

解决方案：通过补丁解决，堆栈详情和补丁见附件，将补丁包更新至  sp目录。