Почему этот поток "- в ожидании блокировки <0x000000070739e520> (a java.beans.PropertyDescriptor)" заблокирован? - PullRequest
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Почему этот поток "- в ожидании блокировки <0x000000070739e520> (a java.beans.PropertyDescriptor)" заблокирован?

0 голосов
/ 11 октября 2019

Мы запускаем веб-приложение на JBoss 7 с JDK 7. Мы сталкиваемся с проблемами портала, которые возникают еженедельно дважды из-за этого потока "at java.beans.PropertyDescriptor.getPropertyType (PropertyDescriptor.java:177)".

  1. Нет ошибки OutOfMemory
  2. В некоторых случаях мы наблюдали больше соединений CLOSE_WAIT в Netstat
  3. Нижеследующий поток получил BLOCKED (500 выше трассировки стека, как показано ниже)

Дамп потока: 

 http-/0.0.0.0:443-1123
priority:6 - threadId:0x0000000054dd3000 - nativeId:0x3668 - nativeId (decimal):13928 - state:BLOCKED
stackTrace:
java.lang.Thread.State: BLOCKED (on object monitor)
at java.beans.PropertyDescriptor.getPropertyType(PropertyDescriptor.java:177)
- waiting to lock <0x000000070739e520> (a java.beans.PropertyDescriptor)
at net.sf.json.JSONObject.defaultBeanProcessing(JSONObject.java:724)
at net.sf.json.JSONObject._fromBean(JSONObject.java:699)
at net.sf.json.JSONObject.fromObject(JSONObject.java:172)
at net.sf.json.AbstractJSON._processValue(AbstractJSON.java:274)
at net.sf.json.JSONArray._processValue(JSONArray.java:2513)
at net.sf.json.JSONArray.processValue(JSONArray.java:2538)
at net.sf.json.JSONArray.addValue(JSONArray.java:2525)
at net.sf.json.JSONArray._fromCollection(JSONArray.java:1056)
at net.sf.json.JSONArray.fromObject(JSONArray.java:123)
at net.sf.json.JSONArray.fromObject(JSONArray.java:105)
at com.reports.GetJsonObject.doPost(GetJsonObject.java:2073)
at com.reports.GetJsonObject.doGet(GetJsonObject.java:41)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at urlfilter.DecodePopUp.doFilter(DecodePopUp.java:84)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at com.googlecode.webutilities.filters.CompressionFilter.doFilter(CompressionFilter.java:112)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at com.reports.ClickjackFilter.doFilter(ClickjackFilter.java:30)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at com.reports.ModuleAccessControlFilter.doFilter(ModuleAccessControlFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at com.reports.SessionTimeOutFilter.doFilter(SessionTimeOutFilter.java:84)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:397)
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:679)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931)
at java.lang.Thread.run(Thread.java:745)

Исходный код Java: 

import net.sf.json.JSONArray;
...
List listV = new ArrayList();
...
    while (rs.next())
    {
      listV.add(new JsonBean(rs.getString(1), rs.getString(2)));
      total++;
    }
...
JSONArray jsonArray = JSONArray.fromObject(listV); // line no: 2073 
String value = "{total:" + total + ",rows:" + jsonArray + "}";
...