title: When I deploy two portlets one after another in liferay the second deployed portlet is undeploying the first deployed portlet in liferay
body: <p>When I am deploying two portlets in liferay 6.0.6 on tomcat server one after another portlet, the second deploying portlet is undeploying the first deployed portlet and vice versa happening when changing its order:</p>
  
  <p>Stacktrace:</p>
  
  <pre><code> 2ERROR [HotDeployUtil:112] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for abc-portlet
   3com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for abc-portlet
   4    at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:45)
   5    at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.invokeDeploy(PluginPackageHotDeployListener.java:161)
   6    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil._doFireDeployEvent(HotDeployUtil.java:109)
   7    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil._fireDeployEvent(HotDeployUtil.java:182)
   8    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:38)
   9    at com.liferay.portal.kernel.servlet.PortletContextListener.doPortalInit(PortletContextListener.java:99)
  10    at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:42)
  11    at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:52)
  12    at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:50)
  13    at com.liferay.portal.kernel.servlet.PortletContextListener.contextInitialized(PortletContextListener.java:55)
  14    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
  15    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
  16    at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1244)
  17    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1342)
  18    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:303)
  19    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
  20    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
  21    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
  22    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
  23    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
  24    at java.lang.Thread.run(Thread.java:744)
  25Caused by: com.liferay.portal.OldServiceComponentException: Build namespace abc has build number 20 which is newer than 4
  26    at com.liferay.portal.service.impl.ServiceComponentLocalServiceImpl.initServiceComponent(ServiceComponentLocalServiceImpl.java:128)
  27    at sun.reflect.GeneratedMethodAccessor689.invoke(Unknown Source)
  28    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  29    at java.lang.reflect.Method.invoke(Method.java:606)
  30    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
  31    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
      at com.liferay.portal.dao.jdbc.aop.DynamicDataSourceTransactionInterceptor.invoke(DynamicDataSourceTransactionInterceptor.java:44)
      at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
      at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
      at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:58)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
      at com.sun.proxy.$Proxy74.initServiceComponent(Unknown Source)
      at com.liferay.portal.service.ServiceComponentLocalServiceUtil.initServiceComponent(ServiceComponentLocalServiceUtil.java:243)
      at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.initServiceComponent(PluginPackageHotDeployListener.java:306)
      at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.doInvokeDeploy(PluginPackageHotDeployListener.java:217)
      at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.invokeDeploy(PluginPackageHotDeployListener.java:158)
      ... 19 more
  09:02:30,390 INFO  [HookHotDeployListener:394] Registering hook for abc-portlet
  09:02:34,913 INFO  [HookHotDeployListener:649] Hook for abc-portlet is available for use
  </code></pre>
  
  <p>Any Solution?</p>