java.lang.NullPointerException tại org.eclipse.persistence.platform.server.ServerPlatformUtils.createServerPlatform (ServerPlatformUtils.java)

Question

EclipseLink 2.6.1 (final) ném ngoại lệ sau đây khi triển khai một ứng dụng Java EE trên GlassFish Server 4.1. Điều này đã không xảy ra trước khi nâng cấp từ 2.6.0.

Warning: java.lang.NullPointerException 
    at org.eclipse.persistence.platform.server.ServerPlatformUtils.createServerPlatform(ServerPlatformUtils.java:101) 
    at org.eclipse.persistence.sessions.factories.SessionManager.init(SessionManager.java:77) 
    at org.eclipse.persistence.sessions.factories.SessionManager.<clinit>(SessionManager.java:71) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.addSessionToGlobalSessionManager(EntityManagerSetupImpl.java:907) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.initSession(EntityManagerSetupImpl.java:2676) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:675) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:305) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:337) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:303) 
    at org.glassfish.persistence.jpa.JPADeployer$2.visitPUD(JPADeployer.java:451) 
    at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:510) 
    at org.glassfish.persistence.jpa.JPADeployer.iterateInitializedPUsAtApplicationPrepare(JPADeployer.java:492) 
    at org.glassfish.persistence.jpa.JPADeployer.event(JPADeployer.java:395) 
    at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131) 
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:487) 
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219) 
    at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at javax.security.auth.Subject.doAs(Subject.java:360) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at javax.security.auth.Subject.doAs(Subject.java:360) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846) 
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722) 
    at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:534) 
    at com.sun.enterprise.v3.admin.AdminAdapter.onMissingResource(AdminAdapter.java:224) 
    at org.glassfish.grizzly.http.server.StaticHttpHandlerBase.service(StaticHttpHandlerBase.java:189) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) 
    at java.lang.Thread.run(Thread.java:745) 

Mặc dù nó là một java.lang.NullPointerException, mức LOG là Warning.

org.eclipse.persistence.sessions.factories.SessionManager#init() được định nghĩa như sau (mặc dù grepcode hiển thị RC1).

74  private static void init() { 
75   String platformClass = ServerPlatformUtils.detectServerPlatform(null); 
76   try { 
77    detectedPlatform = ServerPlatformUtils.createServerPlatform(null, platformClass, SessionManager.class.getClassLoader()); 
78   } catch (NullPointerException npe) { 
79    //some platforms may not be handling 'null' session well, 
80    //so be defensive here and only log throwable here 
81    detectedPlatform = null; 
82    LOG.logThrowable(SessionLog.WARNING, AbstractSessionLog.CONNECTION, npe); 
83   } 
84   supportPartitions = detectedPlatform != null && detectedPlatform.usesPartitions(); 
85   if (supportPartitions) { 
86    managers = new ConcurrentHashMap<String, SessionManager>(4, 0.9f, 1); 
87    SessionManager sm = initializeManager(); 
88    manager = sm; 
89    managers.put(sm.context, sm); 
90   } else { 
91    manager = initializeManager(); 
92   } 
93  } 

đâu createServerPlatform(DatabaseSession session, String platformClass, ClassLoader loader) ném một java.lang.NullPointerException, nếu platformClass là null.

97  public static ServerPlatform createServerPlatform(DatabaseSession session, String platformClass, ClassLoader loader) { 
98   if (platformClass == null) { 
99    throw new NullPointerException(); 
100  } 

      //... 
     } 

Dường như bình thường theo mã. Là nó?

Answer 1

Mặc dù ngoại lệ mà dường như là bình thường, nó không còn tái sản xuất trong EclipseLink 2.6.2 phát hành vào ngày 22 tháng 12 năm 2015.

Vì vậy, nếu bạn xảy ra để lo lắng về ngoại lệ đó, xem xét nâng cấp lên phiên bản EclipseLink rằng (2.6.2).