部署spring应用程序时出现javax.management.InstanceAlreadyExistsException
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<int:poller fixed-delay="${fixedDelay}" default="true">
<int:advice-chain>
<ref bean="pollAdvise"/>
</int:advice-chain>
</int:poller>
<bean id="pollAdvise" class="org.springframework.integration.scheduling.PollSkipAdvice">
<constructor-arg ref="healthCheckStrategy"/>
</bean>
<bean id="healthCheckStrategy" class="test.main.ServiceHealthCheckPollSkipStrategy">
<property name="url" value="${url}"/>
<property name="doHealthCheck" value="${doHealthCheck}"/>
<property name="restTemplate" ref="restTemplate"/>
</bean>
<bean id="restTemplate"
class="org.springframework.web.client.RestTemplate">
<constructor-arg ref="requestFactory"/>
</bean>
<bean id="requestFactory"
class="test.BatchClientHttpRequestFactory">
<constructor-arg ref="verifier"/>
</bean>
我的健康检查策略如下所示
@ManagedResource
public class ServiceHealthCheckPollSkipStrategy implements PollSkipStrategy {
private volatile boolean skip=false;
private String url;
private static String doHealthCheck;
private RestTemplate restTemplate;
public RestTemplate getRestTemplate() {
return restTemplate;
}
public void setRestTemplate(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getDoHealthCheck() {
return doHealthCheck;
}
public void setDoHealthCheck(String doHealthCheck) {
ServiceHealthCheckPollSkipStrategy.doHealthCheck= doHealthCheck;
}
@Override
public boolean skipPoll() {
if(doHealthCheck.equals("false")){
return this.skip;
}
else if(doHealthCheck.equals("true")){
List<String> urlList =getUrlfromEncodedString(url);
for (String url : urlList) {
boolean status =performHealthCheck(url);
if(status==false){
return this.skip = true;
}
}
return this.skip;
}
else {
throw new IllegalArgumentException("do health check can be either true or false");
}
}
/**
* Skip future polls.
*/
@ManagedOperation
public void skipPolls() {
this.skip = true;
}
/**
* Resume polling at the next {@code Trigger} event.
*/
@ManagedOperation
public void reset() {
this.skip = false;
}
private List<String> getUrlfromEncodedString(String urls) throws IllegalArgumentException
{
if(urls==null){
throw new IllegalArgumentException("urls passed is null");
}
List<String> urlList = Arrays.asList(urls.split("\\s*,\\s*"));
return urlList;
}
private boolean performHealthCheck(String url){
if(url==null){
throw new IllegalArgumentException("url passed is null");
}
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
headers.setContentType(MediaType.APPLICATION_JSON);
headers.set("API-Key", "RTM");
HttpEntity<String> request = new HttpEntity<String>("parameters", headers);
ResponseEntity<String> response = restTemplate.
exchange(url, HttpMethod.OPTIONS, request, String.class);
if (response.getStatusCode().toString().equals("200")){
return true;
}
return false;
}
}
我得到以下异常
Unable to register MBean [test.main.ServiceHealthCheckPollSkipStrategy@73d4b814] with key 'healthCheckStrategy'; nested exception is javax.management.InstanceAlreadyExistsException: test.main:name=healthCheckStrategy,type=ServiceHealthCheckPollSkipStrategy
at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:625)
at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:550)
at org.springframework.jmx.export.MBeanExporter.afterSingletonsInstantiated(MBeanExporter.java:432)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:139)
at org.springframework.xd.module.core.SimpleModule.initialize(SimpleModule.java:213)
at org.springframework.xd.dirt.module.ModuleDeployer.doDeploy(ModuleDeployer.java:217)
at org.springframework.xd.dirt.module.ModuleDeployer.deploy(ModuleDeployer.java:200)
at org.springframework.xd.dirt.server.container.DeploymentListener.deployModule(DeploymentListener.java:365)
at org.springframework.xd.dirt.server.container.DeploymentListener.deployStreamModule(DeploymentListener.java:334)
at org.springframework.xd.dirt.server.container.DeploymentListener.onChildAdded(DeploymentListener.java:181)
at org.springframework.xd.dirt.server.container.DeploymentListener.childEvent(DeploymentListener.java:149)
at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:509)
at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:503)
at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:92)
at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297)
at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:83)
at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:500)
at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35)
at org.apache.curator.framework.recipes.cache.PathChildrenCache$10.run(PathChildrenCache.java:762)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.management.InstanceAlreadyExistsException: test.main:name=healthCheckStrategy,type=ServiceHealthCheckPollSkipStrategy
at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:678)
at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:615)
... 30 m
解决方法:
这是因为你还在另一个spring应用程序中声明了另一个与“healthCheckStrategy”具有相同id的bean.您可能将这两个spring应用程序放在同一台服务器上.
解决方案1：
在这个spring应用程序中更改bean id或另一个将解决你的问题.
解决方案2：
添加EnableMBeanExport注释并为每个spring应用程序设置不同的defaultDomain
@Configuration
@EnableMBeanExport(defaultDomain="first")
public class BeanGenerator {...}
@Configuration
@EnableMBeanExport(defaultDomain="second")
public class BeanGenerator {...}
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