如何防止CXF客户端服务死锁?

时间:2012-04-30 15:38:34

标签: multithreading cxf deadlock

我正在研究CXF客户端服务,但负载测试(1000个并发用户)导致大量锁定线程和JVM崩溃。线程似乎被锁定在Jaxb类AccessorInjector:

com/sun/xml/bind/v2/runtime/reflect/opt/AccessorInjector@341F3D78/341F3D84

我的客户端是一个由servlet调用的单例。客户端调用Web服务:

HttpServlet:

SRecherche srech = SRecherche .getInstance();
String reponse = srech.recherche(parametres, retour);

客户服务:

public static SRecherche getInstance() {
        synchronized (SRecherche .class) {
            if (instance == null) {
                instance = new SRecherche();
            }
        }
        return instance;
    }

.
.
.
.

public String recherche(String parametres, String retour[]) {

    SampleSOAPService sampleSOAPService = new SampleSOAPService(ClassLoader.getSystemResource("service.wsdl"));
    SampleSOAP s = sampleSOAPService .getService();
    ((BindingProvider) s).getRequestContext().put("thread.local.request.context", "true");
    // set the username and password
    ((BindingProvider) s).getRequestContext().put(BindingProvider.USERNAME_PROPERTY, username);
    ((BindingProvider) s).getRequestContext().put(BindingProvider.PASSWORD_PROPERTY, password);
    //set timeout to be longer
    Client client = ClientProxy.getClient(s);
    HTTPConduit http = (HTTPConduit) client.getConduit();
    HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
    httpClientPolicy.setConnectionTimeout(timeout);
    httpClientPolicy.setAllowChunking(false);
    httpClientPolicy.setReceiveTimeout(timeout);
    httpClientPolicy.setConnection(ConnectionType.CLOSE);
    http.setClient(httpClientPolicy);
.
.
.

    s.callService(...);
.
.
}

我正在开发weblogic 9.2 / Java 5.0 / CXF 2.5

您是否知道该客户端同时调用的批次可能会导致锁定线程?

JDK版本:

J2RE 5.0 IBM J9 2.3 AIX ppc-32 build j9vmap3223-20081129

JVM参数:

-Xjcl:jclscar_23
-Dcom.ibm.oti.vm.bootstrap.library.path=/usr/java5/jre/bin
-Dsun.boot.library.path=/usr/java5/jre/bin
-Djava.library.path=/usr/java5/jre/bin:/usr/java5/jre/bin:/usr/java5/jre/bin/classic:/usr/java5/jre/bin:/exec/products/weblogic/v9.2/bea/patch_weblogic921/profiles/default/native:/exec/products/weblogic/v9.2/server/native/aix/ppc:/usr/java5/jre/bin/j9vm:/usr/lib
-Djava.home=/usr/java5/jre
-Djava.ext.dirs=/usr/java5/jre/lib/ext
-Duser.dir=/exec/products/weblogic/v9.2/user_projects/domains/rforce
_j2se_j9=70912 0xF12ACF08
vfprintf 0x300017A4
-Xms2048m
-Xmx2048m
-Dcom.sun.xml.namespace.QName.useCompatibleSerialVersionUID=1.0
-da
-Dplatform.home=/exec/products/weblogic/v9.2
-Dwls.home=/exec/products/weblogic/v9.2/server
-Dwli.home=/exec/products/weblogic/v9.2/integration
-Dweblogic.management.discover=true
-Dwlw.iterativeDev=false
-Dwlw.testConsole=false
-Dwlw.logErrorsToConsole=
-Dweblogic.ext.dirs=/exec/products/weblogic/v9.2/bea/patch_weblogic921/profiles/default/sysext_manifest_classpath
-Dcom.wily.introscope.agentProfile=/exec/products/weblogic/introscope/wily/IntroscopeAgent_prod.profile
-javaagent:/exec/products/weblogic/introscope/wily/Agent.jar
-Dcom.wily.introscope.agent.agentName=RFORCE
-Dweblogic.Name=RForceServer
-Djava.security.policy=/exec/products/weblogic/v9.2/server/lib/weblogic.policy
-Dinvokedviajava
-Djava.class.path=/exec/products/weblogic/v9.2/server/lib/geronimo-ws-metadata_2.0_spec-1.1.3.jar:/exec/products/weblogic/v9.2/user_projects/domains/rforce/config/rforce/:/exec/products/weblogic/v9.2/user_projects/domains/rforce/config/rforce/wsdl/drakkar/:/usr/java5/lib/tools.jar:/exec/products/weblogic/v9.2/server/lib/weblogic_sp.jar:/exec/products/weblogic/v9.2/server/lib/weblogic.jar:/exec/products/weblogic/v9.2/server/lib/webservices.jar::/exec/products/weblogic/v9.2/common/eval/pointbase/lib/pbclient51.jar:/exec/products/weblogic/v9.2/server/lib/xqrl.jar::
vfprintf
_port_library 0xF12AC748
-Xdump

谢谢, 西蒙

1 个答案:

答案 0 :(得分:0)

只需快速浏览一下,因为您手动完成所有操作(即处理所有连接等),我唯一能推荐的就是在您的公共String recherche中启动threqad(String parametres,String retour [])实施。

将您拥有的所有代码包装在匿名的runnable或Thread实例中并启动它。该线程将处理对客户端的所有处理和响应,使recherche()方法可以自由地进行另一次调用。

只是一个想法。

同样在FYI中,上面描述的客户端实际上是Servlet,因为它正在调用服务。或者换句话说,看起来Servlet是消费者而单身人士是提供者。