我正在使用teiid虚拟过程来创建Rest API并公开我的数据。我已使用缓存提示启用了结果集缓存。当我发送两次相同的API请求时，我在第二次尝试中没有数据，并且teiid控制台记录了以下异常。但是，当缓存被禁用或者我等待缓存无效后发送第二个请求（在ttl时间之后）请求被正确执行并且我得到相关的响应。我做的另一个重要观察是，当响应大小限制为小于某个大小时（例如，使用LIMIT子句将响应大小限制为10个记录），请求在启用缓存时正确提供。只有当我在特定大小后增加记录大小时才会发生这种情况（在我的情况下为15）。
我是否可以知道此背后的原因以及任何修复或解决方法，以便我可以继续使用结果集缓存而不会出现此问题。
05:04:52,909 ERROR [io.undertow.request] (default task-20) UT005023: Exception handling request to /TestView_1/report/get_data: org.jboss.resteasy.spi.UnhandledException: RESTEASY003770: Response is committed, can't handle exception
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:167)
at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:471)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:415)
at org.jboss.resteasy.core.SynchronousDispatcher.invokePropagateNotFound(SynchronousDispatcher.java:240)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:225)
at org.jboss.resteasy.plugins.server.servlet.FilterDispatcher.doFilter(FilterDispatcher.java:62)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: already removed
at org.teiid.common.buffer.FileStore.checkRemoved(FileStore.java:162)
at org.teiid.common.buffer.FileStore.read(FileStore.java:156)
at org.teiid.common.buffer.FileStore$1.nextBuffer(FileStore.java:223)
at org.teiid.common.buffer.ExtensibleBufferedInputStream.ensureBytes(ExtensibleBufferedInputStream.java:42)
at org.teiid.common.buffer.ExtensibleBufferedInputStream.read(ExtensibleBufferedInputStream.java:54)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.Reader.read(Reader.java:100)
at org.teiid.core.util.ReaderInputStream.read(ReaderInputStream.java:94)
at org.teiid.core.util.ObjectConverterUtil.write(ObjectConverterUtil.java:106)
at org.teiid.core.util.ObjectConverterUtil.write(ObjectConverterUtil.java:143)
at org.teiid.core.util.ObjectConverterUtil.write(ObjectConverterUtil.java:139)
at org.teiid.jboss.rest.TeiidRSProvider$1.write(TeiidRSProvider.java:72)
at org.jboss.resteasy.plugins.providers.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:32)
at org.jboss.resteasy.plugins.providers.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:17)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.writeTo(AbstractWriterInterceptorContext.java:131)
at org.jboss.resteasy.core.interception.ServerWriterInterceptorContext.writeTo(ServerWriterInterceptorContext.java:60)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:120)
at org.jboss.resteasy.security.doseta.DigitalSigningInterceptor.aroundWriteTo(DigitalSigningInterceptor.java:145)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:124)
at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.aroundWriteTo(GZIPEncodingInterceptor.java:100)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:124)
at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:98)
at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:466)
... 33 more
答案 0 :(得分：0)
我能够找到解决方案。我试着提到Jdbc cliet，就像@ramesh一样。但问题仍然存在。 对于我们从REST API检索的XML和JSON格式响应，此问题仍然存在。 仅当响应大小大于4000个字符（这是teiid的默认限制）时才会发生这种情况。我使用管理控制台从系统属性增加了此限制，然后重新启动teiid群集。
property value boot-time
org.teiid.maxStringLength 200000 true
这解决了这个空缓存响应问题。