Question

Helo家伙，

当我尝试在页面上导航时出错。错误提示：“增加max_prepared_transactions（当前为1）”。

    WARN  [com.arjuna.ats.jta] (default task-8) ARJUNA016041: prepare on < formatId=131077, gtrid_length=29, bqual_length=36, tx_uid=0:ffffc0a80471:3a3e542a:57835324:1858, node_name=1, branch_uid=0:ffffc0a80471:3a3e542a:57835324:185e, subordinatenodename=null, eis_name=java:/jdbc/referenceData > (XAResourceWrapperImpl@56b51930[xaResource=org.jboss.jca.adapters.jdbc.xa.XAManagedConnection@450e867b pad=false overrideRmValue=null productName=PostgreSQL productVersion=9.5.2 jndiName=java:/jdbc/referenceData]) failed with exception XAException.XAER_RMERR: org.postgresql.xa.PGXAException: Error preparing transaction
    at org.postgresql.xa.PGXAConnection.prepare(PGXAConnection.java:334)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnection.prepare(XAManagedConnection.java:330)
    at org.jboss.jca.core.tx.jbossts.XAResourceWrapperImpl.prepare(XAResourceWrapperImpl.java:177)
    at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelPrepare(XAResourceRecord.java:210)
    at com.arjuna.ats.arjuna.coordinator.BasicAction.doPrepare(BasicAction.java:2586)
    at com.arjuna.ats.arjuna.coordinator.BasicAction.doPrepare(BasicAction.java:2536)
    at com.arjuna.ats.arjuna.coordinator.BasicAction.prepare(BasicAction.java:2097)
    at com.arjuna.ats.arjuna.coordinator.BasicAction.End(BasicAction.java:1481)
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:96)
    at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:162)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1166)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:126)
    at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
    at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:173)
    at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1021) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) [spring-tx-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655) [spring-aop-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at ro.digidata.socd.service.impl.GeprodromIntegrationBean$$EnhancerBySpringCGLIB$$d1fb6ba0.getCountyName(<generated>) [classes:]
    at ro.digidata.socd.portal.jsf.mbeans.users.UsersMB.initUserDetailsPage(UsersMB.java:468) [classes:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_77]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_77]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_77]
    at java.lang.reflect.Method.invoke(Method.java:498) [rt.jar:1.8.0_77]
    at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329) [jboss-el-2.0.1.GA.jar:]
    at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:274) [jboss-el-2.0.1.GA.jar:]
    at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59) [jboss-el-2.0.1.GA.jar:]
    at org.jboss.el.parser.AstValue.getValue(AstValue.java:67) [jboss-el-2.0.1.GA.jar:]
    at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) [jboss-el-2.0.1.GA.jar:]
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at com.sun.faces.facelets.el.ELText$ELTextVariable.writeText(ELText.java:238) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.facelets.el.ELText$ELTextComposite.writeText(ELText.java:154) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:85) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:183) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:456) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at org.apache.myfaces.tomahawk.application.ResourceViewHandlerWrapper.renderView(ResourceViewHandlerWrapper.java:169) [tomahawk21-1.1.14.jar:1.1.14]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:100) [primefaces-5.3.jar:5.3]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at ro.digidata.socd.portal.filters.ExceptionFilter.doFilter(ExceptionFilter.java:55) [classes:]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at ro.digidata.socd.portal.filters.DataCollectionEditFilter.doFilter(DataCollectionEditFilter.java:47) [classes:]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:168) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter.doFilter(AbstractPreAuthenticatedProcessingFilter.java:116) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:133) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176) [spring-security-web-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at ro.digidata.socd.portal.filters.ProcessingTimeFilter.doFilter(ProcessingTimeFilter.java:65) [classes:]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.jrHandle(ServletInitialHandler.java) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.zeroturnaround.javarebel.integration.servlet.undertow.cbp.ServletInitialHandlerCBP.handleRequest(ServletInitialHandlerCBP.java:100) [undertow-servlet-jr-plugin-6.4.3.jar:]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_77]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_77]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_77]
Caused by: org.postgresql.util.PSQLException: ERROR: maximum number of prepared transactions reached
  Hint: Increase max_prepared_transactions (currently 1).
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2284)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2003)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:200)
    at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:424)
    at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:321)
    at org.postgresql.jdbc.PgStatement.executeUpdate(PgStatement.java:297)
    at org.postgresql.xa.PGXAConnection.prepare(PGXAConnection.java:326)
    ... 128 more

已安装我有pgAdMIn III版本1.22
在服务器上有postgresql 9.4：D：\ install \ wildfly-8.2.0.Final \ modules \ org \ postgresql \ main \ postgresql-9.4.1208.jar
在pgAdmin上我有PostgreSQL 9.5.2，如下所示：

为了解决这个问题，我试图增加max_prepared_transactions，如提示所示：

1）在pgAdmin客户端工具＆gt;服务器配置＆gt; postgresql.conf我已将max_prepared_tranzaction设置为10

然后我尝试通过以下步骤重启服务器：

工具＆gt;服务器配置＆gt; postgresql.conf＆gt;文件＆gt;重新加载服务器我也试过
pgAdmin III＆gt;文件＆gt;重新加载配置

2）在C：\ Program Files（x86）\ pgAdmin III \ 1.22 \ i18n \ pg_settings.csv中我看到了这个：

但我不知道它是否适合编辑。

执行这些步骤后，错误仍然存在。

然后我尝试找到postfresql.config并执行了您可以在下面看到的查询：

但我找不到该文件（如上图所示）。

有人可以给我一个解决方案来解决错误吗？我认为应该增加参数max_prepared_transaction，但我找不到postgresql.config文件。

Answer 1

更改max_prepared_transactions后需要重新启动服务器，请参阅the documentation。

重新加载是不够的。

你无法用pgAdmin III做到这一点。

Answer 2

回答你的问题，

您需要将#include<type_traits> // (...) template<typename ... SensorType> class BaseSensor : public SensorType ... { template<typename F> void execute(F &&f) { int arr[] = { (f(static_cast<SensorType&>(*this)), 0)..., 0 }; (void)arr; } public: void update() { execute([](auto &t) { t.std::remove_reference<decltype(t)>::type::update(); }); } void printStats() { execute([](auto &t) { t.std::remove_reference<decltype(t)>::type::printStats(); }); } };的数量从1增加到您认为符合要求的数字（但建议使用小于100的数字）。只有在@Laurenz Albe建议的服务器重启后，配置更改才会生效！
您必须搜索名为max_prepared_transactions而不是postgresql.conf的文件（这是错误的，您将永远不会在已配置的PostgreSQL服务器上找到此文件），这通常是在PostgreSQL安装的postgresql.config文件夹下找到（以及您之前在问题的屏幕截图中分享的文件夹结构）！

希望这有帮助！

org.postgresql.util.PSQLException：错误：达到的最大准备事务数

2 个答案: