GemFire PDX序列化无法在Pulse或REST API中使用OQL？

时间：2017-12-08 05:37:46

标签： spring rest gemfire spring-data-gemfire

我们使用 Spring 作为客户端与GemFire合作。我们的数据将保存到我们正在运行的GemFire实例的区域。

当我们提出请求时，我们可以通过 Spring 获取数据。

已完成Auto PDX序列化的所有配置，但是当我们尝试通过Pulse中的OQL或使用GemFire REST Apis查询数据时，我们得到ClassNotFoundException：

{"message" : "Server has encountered while executing Adhoc query!", "stackTrace" : "com.gemstone.gemfire.rest.internal.web.exception.GemfireRestException: Server has encountered while executing Adhoc query! 
at com.gemstone.gemfire.rest.internal.web.controllers.QueryAccessController.runAdhocQuery(QueryAccessController.java:200) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:498) 
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215) 
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) 
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:919) 
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851) 
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953) 
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) 
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) 
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808) 
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) 
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:88) 
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106) 
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) 
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) 
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) 
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) 
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) 
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) 
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) 
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) 
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) 
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) 
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110) 
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) 
at org.eclipse.jetty.server.Server.handle(Server.java:499) 
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) 
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) 
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) 
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) 
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) 
at java.lang.Thread.run(Thread.java:745) 
Caused by: com.gemstone.gemfire.SerializationException: A ClassNotFoundException was thrown while trying to deserialize cached value. 
at com.gemstone.gemfire.internal.cache.EntryEventImpl.deserialize(EntryEventImpl.java:1561) 
at com.gemstone.gemfire.internal.cache.EntryEventImpl.deserialize(EntryEventImpl.java:1546) 
at com.gemstone.gemfire.internal.cache.VMCachedDeserializable.getDeserializedValue(VMCachedDeserializable.java:124) 
at com.gemstone.gemfire.internal.cache.LocalRegion.getDeserialized(LocalRegion.java:1275) 
at com.gemstone.gemfire.internal.cache.LocalRegion$NonTXEntry.getValue(LocalRegion.java:9140) 
at com.gemstone.gemfire.internal.cache.EntriesSet$EntriesIterator.moveNext(EntriesSet.java:183) 
at com.gemstone.gemfire.internal.cache.EntriesSet$EntriesIterator.<init>(EntriesSet.java:121) 
at com.gemstone.gemfire.internal.cache.EntriesSet.iterator(EntriesSet.java:85) 
at com.gemstone.gemfire.cache.query.internal.ResultsCollectionWrapper.iterator(ResultsCollectionWrapper.java:181) 
at com.gemstone.gemfire.cache.query.internal.QRegion.iterator(QRegion.java:225) 
at com.gemstone.gemfire.cache.query.internal.CompiledSelect.doNestedIterations(CompiledSelect.java:712) 
at com.gemstone.gemfire.cache.query.internal.CompiledSelect.doIterationEvaluate(CompiledSelect.java:577) 
at com.gemstone.gemfire.cache.query.internal.CompiledSelect.evaluate(CompiledSelect.java:284) 
at com.gemstone.gemfire.cache.query.internal.DefaultQuery.executeUsingContext(DefaultQuery.java:529) 
at com.gemstone.gemfire.cache.query.internal.DefaultQuery.execute(DefaultQuery.java:365) 
at com.gemstone.gemfire.cache.query.internal.DefaultQuery.execute(DefaultQuery.java:303) 
at com.gemstone.gemfire.rest.internal.web.controllers.QueryAccessController.runAdhocQuery(QueryAccessController.java:180) 
... 40 more 
Caused by: java.lang.ClassNotFoundException: in.cycorax.User 
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
at java.lang.Class.forName0(Native Method)

2 个答案:

答案 0 :(得分：1)

看起来查询试图反序列化in.cycorax.User对象，但该类在服务器的类路径中不存在。

你的疑问是什么？使用PDX，您应该能够查询值的字段，而无需在服务器上反序列化对象。

但是如果你的查询在你的对象上调用一个方法或者试图读取一个不是PDX序列化数据的一部分的字段（甚至可能是拼写错误的字段！），那么gemfire将尝试反序列化你的对象并查看如果它可以调用该方法或在对象上找到该字段。

因此，您可以更改查询以使其不需要反序列化，也可以将类添加到服务器的类路径中。

答案 1 :(得分：0)

+1 Dan Smith 上面说的话。您还必须小心“SELECT * FROM /Region”查询。此查询将尝试反序列化整个对象。正如Dan所提到的，将查询限制在将被序列化为PDX的对象字段中。如果您的对象无论如何都要反序列化，那么您必须在GemFire服务器的类路径上拥有应用程序域对象类型（类），没有例外。

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