【发布时间】：2012-06-13 17:34:44
【问题描述】：
我已经多次测试了 Google Plugin for Eclipse (GPE) 在运行一个项目时表现出的一些奇怪行为，该项目既包含一个 JPA 方面又坚持到 Google Cloud SQL 和 GWT。我正在使用 Eclipse 3.7 Indigo、AppEngine 1.6.5、EclipseLink 2.3 JPA 和 GWT 2.4.0。
我在 directions 之后成功设置了带有 GPE 的 JPA 2.0。然后，一旦工作正常，我会尝试在项目的 GPE“Google”菜单中检查“使用 GWT”。就在那时，JPA 对 Google Cloud SQL 的持久性中断了。幸运的是，通过取消选中“使用 GWT”，这是可逆的。我使用 Cloud SQL 进行开发，而不是本地 MySQL。接下来我想测试一下。
这是我在检查“使用 GWT”后弹出的连接错误的堆栈跟踪。它的缩写是：“java.lang.NoClassDefFoundError：无法初始化类 sun.security.pkcs11.SunPKCS11”。
[EL Severe]: 2012-06-13 02:47:02.408--ServerSession(4315167)--com.google.apphosting.api.ApiProxy$UnknownException: An error occurred for the API request rdbms.OpenConnection().
Jun 13, 2012 2:47:02 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: /jpatest
javax.persistence.PersistenceException: com.google.apphosting.api.ApiProxy$UnknownException: An error occurred for the API request rdbms.OpenConnection().
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:517)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:294)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:272)
at com.myproject.JpatestServlet.doGet(JpatestServlet.java:14)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:369)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: com.google.apphosting.api.ApiProxy$UnknownException: An error occurred for the API request rdbms.OpenConnection().
at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:518)
at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:452)
at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:430)
at java.util.concurrent.Executors$PrivilegedCallable$1.run(Executors.java:493)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.concurrent.Executors$PrivilegedCallable.call(Executors.java:490)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.security.pkcs11.SunPKCS11
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
at sun.security.jca.ProviderConfig$3.run(ProviderConfig.java:262)
at sun.security.jca.ProviderConfig$3.run(ProviderConfig.java:244)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.jca.ProviderConfig.doLoadProvider(ProviderConfig.java:244)
at sun.security.jca.ProviderConfig.getProvider(ProviderConfig.java:224)
at sun.security.jca.ProviderList.getProvider(ProviderList.java:232)
at sun.security.jca.ProviderList.getService(ProviderList.java:330)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:157)
at java.security.Security.getImpl(Security.java:696)
at java.security.AlgorithmParameters.getInstance(AlgorithmParameters.java:130)
at sun.security.x509.AlgorithmId.decodeParams(AlgorithmId.java:121)
at sun.security.x509.AlgorithmId.<init>(AlgorithmId.java:114)
at sun.security.x509.AlgorithmId.parse(AlgorithmId.java:381)
at sun.security.x509.X509Key.parse(X509Key.java:168)
at sun.security.x509.CertificateX509Key.<init>(CertificateX509Key.java:75)
at sun.security.x509.X509CertInfo.parse(X509CertInfo.java:705)
at sun.security.x509.X509CertInfo.<init>(X509CertInfo.java:169)
at sun.security.x509.X509CertImpl.parse(X509CertImpl.java:1747)
at sun.security.x509.X509CertImpl.<init>(X509CertImpl.java:196)
at sun.security.provider.X509Factory.engineGenerateCertificate(X509Factory.java:107)
at java.security.cert.CertificateFactory.generateCertificate(CertificateFactory.java:322)
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:763)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:55)
at java.security.KeyStore.load(KeyStore.java:1201)
at com.google.appengine.api.urlfetch.dev.LocalURLFetchService.getTrustStore(LocalURLFetchService.java:190)
at com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createValidatingScheme(LocalURLFetchService.java:206)
at com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createHttpClient(LocalURLFetchService.java:252)
at com.google.appengine.api.urlfetch.dev.LocalURLFetchService.init(LocalURLFetchService.java:298)
at com.google.appengine.tools.development.ApiProxyLocalImpl.startServices(ApiProxyLocalImpl.java:581)
at com.google.appengine.tools.development.ApiProxyLocalImpl.access$700(ApiProxyLocalImpl.java:46)
at com.google.appengine.tools.development.ApiProxyLocalImpl$2.run(ApiProxyLocalImpl.java:564)
at com.google.appengine.tools.development.ApiProxyLocalImpl$2.run(ApiProxyLocalImpl.java:562)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.tools.development.ApiProxyLocalImpl.getService(ApiProxyLocalImpl.java:561)
at com.google.appengine.tools.development.ApiProxyLocalImpl.resolveDeadline(ApiProxyLocalImpl.java:233)
at com.google.appengine.tools.development.ApiProxyLocalImpl.doAsyncCall(ApiProxyLocalImpl.java:214)
at com.google.appengine.tools.development.ApiProxyLocalImpl.makeSyncCall(ApiProxyLocalImpl.java:147)
at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:105)
at com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:37)
at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.fetchResponse(URLFetchServiceStreamHandler.java:418)
at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getInputStream(URLFetchServiceStreamHandler.java:297)
at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getResponseCode(URLFetchServiceStreamHandler.java:150)
at com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:37)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:89)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:814)
at com.google.cloud.sql.jdbc.internal.googleapi.RpcGoogleApi$DefaultGoogleApi.execImpl(RpcGoogleApi.java:346)
at com.google.cloud.sql.jdbc.internal.googleapi.RpcGoogleApi$DefaultGoogleApi.exec(RpcGoogleApi.java:322)
at com.google.cloud.sql.jdbc.internal.googleapi.RpcGoogleApi.openConnection(RpcGoogleApi.java:100)
at com.google.appengine.api.rdbms.dev.LocalRdbmsServiceRemoteDriver.openConnection(LocalRdbmsServiceRemoteDriver.java:206)
at com.google.appengine.api.rdbms.dev.LocalRdbmsService.openConnection(LocalRdbmsService.java:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:498)
... 10 more
这是我在 Eclipse 运行配置中添加 GWT 后的连接参数：
-remoteUI "${gwt_remote_ui_server_port}:${unique_id}" -logLevel INFO -codeServerPort 9997 -war /home/eric/workspace/jpatest/war -server com.google.appengine.tools.development.gwt.AppEngineLauncher -port 8888 com.myproject.jpatest
Just JPA: --port=8888 /home/eric/workspace/jpatest/war
VM
-Drdbms.password= -Drdbms.user= -Drdbms.database=compass -Drdbms.hosted.instance=ejahn.net:openciss:compasslight -Drdbms.server=hosted -Xmx512m -javaagent:/home/eric/eclipse/appengine-java-sdk-1.6.5/lib/agent/appengine-agent.jar
提前感谢您提供任何见解。我也会尝试与 Google 分享这一点，因为我认为这是他们最终需要注意的事情。
【问题讨论】：
-
你用的是什么版本的jdk？你试过另一个吗？
-
看看这个可能：stackoverflow.com/questions/10034900/… .. 正如@jonasr 所说，可能是 JDK 问题。
标签： gwt eclipse-plugin jpa-2.0 google-apps google-cloud-sql