java - JAX-WS 线程占用 %100 CPU

Question

我有一个使用 Spring 和 JAX-WS 公开的 Web 服务。我使用 jax-ws commons 来做到这一点 (http://jax-ws-commons.java.net/spring/)。应用程序部署在 weblogic 10.3 上，有时某些线程似乎被卡住了。上次我获得线程转储时，我看到 6 个线程被标记为“STUCK”并且这些线程消耗了 %100 CPU。线程的踪迹如下:

        "[STUCK] ExecuteThread: '7' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=10 tid=0x00002aaaec5f8800 nid=0x3d99 run
nable [0x0000000048ca4000]
    java.lang.Thread.State: RUNNABLE
        at java.util.HashMap.put(HashMap.java:374)
        at java.util.HashSet.add(HashSet.java:200)
        at weblogic.wsee.jaxws.ServerLateInitTube.initializeCopy(ServerLateInitTube.java:56)
        at weblogic.wsee.jaxws.ServerLateInitTube.copy(ServerLateInitTube.java:45)
        at weblogic.wsee.jaxws.ServerLateInitTube.copy(ServerLateInitTube.java:24)
        at com.sun.xml.ws.api.pipe.TubeCloner.copy(TubeCloner.java:102)
        at com.sun.xml.ws.api.pipe.TubeCloner.clone(TubeCloner.java:74)
        at com.sun.xml.ws.server.WSEndpointImpl$2.<init>(WSEndpointImpl.java:251)
        at com.sun.xml.ws.server.WSEndpointImpl.createPipeHead(WSEndpointImpl.java:250)
        at com.sun.xml.ws.api.server.Adapter$Toolkit.<init>(Adapter.java:108)
        at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.<init>(HttpAdapter.java:434)
        at com.sun.xml.ws.transport.http.HttpAdapter.createToolkit(HttpAdapter.java:203)
        at com.sun.xml.ws.transport.http.HttpAdapter.createToolkit(HttpAdapter.java:99)
        at com.sun.xml.ws.api.server.Adapter$1.create(Adapter.java:117)
        at com.sun.xml.ws.api.server.Adapter$1.create(Adapter.java:115)
        at com.sun.xml.ws.util.Pool.take(Pool.java:78)
        at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:248)
        at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:140)
        at com.sun.xml.ws.transport.http.servlet.WSServletDelegate.doGet(WSServletDelegate.java:129)
        at com.sun.xml.ws.transport.http.servlet.WSServletDelegate.doPost(WSServletDelegate.java:160)
        at com.sun.xml.ws.transport.http.servlet.WSSpringServlet.doPost(WSSpringServlet.java:52)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3594)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2202)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

您知道线程卡住的原因吗？

Answer 1

非synchronized HashMap 的put 方法很有可能是多线程调用的。当从多个线程大量调用 HashMap 的 put 方法时，我遇到了同样的问题。