Spring Boot 启动时间过长

Question

我有一个Spring Boot应用程序，它监听RabbitMQ队列。问题在于当我运行应用程序时，它会在Hibernate的特定步骤上挂起，并且需要大约10分钟才能继续。

以下是它挂起的位置：

INFO [] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext
INFO [] org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 3338 ms
INFO [] org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor - Initializing ExecutorService  'metricsExecutor'
INFO [] org.springframework.boot.context.embedded.ServletRegistrationBean - Mapping servlet: 'dispatcherServlet' to [/]
INFO [] org.springframework.boot.context.embedded.FilterRegistrationBean - Mapping filter: 'metricFilter' to: [/*]
INFO [] org.springframework.boot.context.embedded.FilterRegistrationBean - Mapping filter: 'characterEncodingFilter' to: [/*]
 INFO [] org.springframework.boot.context.embedded.FilterRegistrationBean - Mapping filter: 'webRequestLoggingFilter' to: [/*]
INFO [] org.springframework.boot.context.embedded.FilterRegistrationBean - Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
 INFO [] org.springframework.boot.context.embedded.FilterRegistrationBean - Mapping filter: 'applicationContextIdFilter' to: [/*]
 [main] INFO [] org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean - Building JPA container EntityManagerFactory for persistence unit 'default'
 [main] INFO [] org.hibernate.jpa.internal.util.LogHelper - HHH000204: Processing PersistenceUnitInfo [
name: default
...]
 [main] INFO [] org.hibernate.Version - HHH000412: Hibernate Core {4.3.7.Final}
 [main] INFO [] org.hibernate.cfg.Environment - HHH000205: Loaded properties from resource hibernate.properties: {hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect, hibernate.show_sql=true, hibernate.bytecode.use_reflection_optimizer=false, hibernate.format_sql=true, hibernate.ejb.naming_strategy=org.hibernate.cfg.DefaultNamingStrategy}
 [main] INFO [] org.hibernate.cfg.Environment - HHH000021: Bytecode provider name : javassist
 [main] INFO [] org.hibernate.annotations.common.Version - HCANN000001: Hibernate Commons Annotations {4.0.5.Final}

以下是时间信息

2015-07-08 09:31:16,714 [main] INFO [] org.hibernate.Version - HHH000412: Hibernate Core {4.3.7.Final}
2015-07-08 09:31:16,717 [main] INFO [] org.hibernate.cfg.Environment - HHH000205: Loaded properties from resource hibernate.properties: {hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect, hibernate.show_sql=true, hibernate.bytecode.use_reflection_optimizer=false, hibernate.format_sql=true, hibernate.ejb.naming_strategy=org.hibernate.cfg.DefaultNamingStrategy}
2015-07-08 09:31:16,717 [main] INFO [] org.hibernate.cfg.Environment - HHH000021: Bytecode provider name : javassist
2015-07-08 09:31:16,895 [main] INFO [] org.hibernate.annotations.common.Version - HCANN000001: Hibernate Commons Annotations {4.0.5.Final}

在上述这行代码中，程序会停止运行八分钟，并等待任何信息的下达，同时生成以下日志。

15-07-14 15:36:22,917 [main] INFO [] com.test.myApp.reporting.service.Application
 - Starting Application on hyd-rupakular-m.local with PID 654 (/Users/myUser/code/myRepo/target/classes started by rupakulr in /Users/myuser/myRepo/xyzabc)
2015-07-14 15:36:22,966 [main] INFO [] org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext - Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@5fa0d903: startup date [Tue Jul 14 15:36:22 IST 2015]; root of context hierarchy
2015-07-14 15:36:24,023 [main] INFO [] org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-integration-context.xml]
2015-07-14 15:36:24,332 [main] INFO [] org.springframework.beans.factory.config.PropertiesFactoryBean - Loading properties file from URL [jar:file:/Users/rupakulr/.m2/repository/org/springframework/integration/spring-integration-core/4.1.2.RELEASE/spring-integration-core-4.1.2.RELEASE.jar!/META-INF/spring.integration.default.properties]
2015-07-14 15:45:09,646 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/env],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2015-07-14 15:45:09,646 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/metrics/{name:.*}],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.MetricsMvcEndpoint.value(java.lang.String)
2015-07-14 15:45:09,646 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/metrics],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2015-07-14 15:45:09,647 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/mappings],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2015-07-14 15:45:09,647 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/trace],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2015-07-14 15:45:09,647 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/shutdown],methods=[POST],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.ShutdownMvcEndpoint.invoke()
2015-07-14 15:45:09,647 [main] INFO [] org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping - Mapped "{[/manage/beans],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2015-07-14 15:45:09,700 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Registering beans for JMX exposure on startup
2015-07-14 15:45:09,708 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Bean with name 'org.springframework.integration.channel.interceptor.WireTap#0' has been autodetected for JMX exposure
2015-07-14 15:45:09,708 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Bean with name 'org.springframework.integration.channel.interceptor.WireTap#1' has been autodetected for JMX exposure
2015-07-14 15:45:09,709 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Bean with name 'org.springframework.integration.config.RouterFactoryBean#0' has been autodetected for JMX exposure
2015-07-14 15:45:09,712 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Located managed bean 'org.springframework.integration.channel.interceptor.WireTap#0': registering with JMX server as MBean [org.springframework.integration.channel.interceptor:name=org.springframework.integration.channel.interceptor.WireTap#0,type=WireTap]
2015-07-14 15:45:09,726 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Located managed bean 'org.springframework.integration.channel.interceptor.WireTap#1': registering with JMX server as MBean [org.springframework.integration.channel.interceptor:name=org.springframework.integration.channel.interceptor.WireTap#1,type=WireTap]
2015-07-14 15:45:09,730 [main] INFO [] org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Located managed bean 'org.springframework.integration.config.RouterFactoryBean#0': registering with JMX server as MBean [org.springframework.integration.router:name=org.springframework.integration.config.RouterFactoryBean#0,type=HeaderValueRouter]
2015-07-14 15:45:09,745 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Registering beans for JMX exposure on startup
2015-07-14 15:45:09,749 [main] INFO [] org.springframework.context.support.DefaultLifecycleProcessor - Starting beans in phase -2147483648
2015-07-14 15:45:09,750 [main] INFO [] org.springframework.context.support.DefaultLifecycleProcessor - Starting beans in phase 0
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {router} as a subscriber to the 'reporting-dealer-compliance-dealer-list-channel' channel
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.reporting-dealer-compliance-dealer-list-channel' has 1 subscriber(s).
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started org.springframework.integration.config.ConsumerEndpointFactoryBean#0
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {object-to-json-transformer} as a subscriber to the 'reporting-dealer-compliance-dealer-compliance-json-channel' channel
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.reporting-dealer-compliance-dealer-compliance-json-channel' has 1 subscriber(s).
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started org.springframework.integration.config.ConsumerEndpointFactoryBean#1
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {logging-channel-adapter:logging-channel.adapter} as a subscriber to the 'logging-channel' channel
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.logging-channel' has 1 subscriber(s).
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started logging-channel.adapter
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {stream:outbound-channel-adapter(character):std-out-channel.adapter} as a subscriber to the 'std-out-channel' channel
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.std-out-channel' has 1 subscriber(s).
2015-07-14 15:45:09,751 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started std-out-channel.adapter
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.amqp.inbound.AmqpInboundGateway - started org.springframework.integration.amqp.inbound.AmqpInboundGateway#0
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {amqp:outbound-channel-adapter:invalidMessageChannelAdapter} as a subscriber to the 'invalid-message-channel' channel
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.invalid-message-channel' has 2 subscriber(s).
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started invalidMessageChannelAdapter
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {service-activator} as a subscriber to the 'failed-channel' channel
2015-07-14 15:45:10,968 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.failed-channel' has 1 subscriber(s).
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started org.springframework.integration.config.ConsumerEndpointFactoryBean#2
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {amqp:outbound-channel-adapter:failedMessageChannelAdapter} as a subscriber to the 'failed-channel' channel
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.failed-channel' has 2 subscriber(s).
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started failedMessageChannelAdapter
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.handler.MessageHandlerChain - started org.springframework.integration.handler.MessageHandlerChain#0
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {chain} as a subscriber to the 'reporting-dealer-compliance-inbound-channel' channel
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.reporting-dealer-compliance-inbound-channel' has 1 subscriber(s).
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started org.springframework.integration.config.ConsumerEndpointFactoryBean#3
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.handler.MessageHandlerChain - started org.springframework.integration.handler.MessageHandlerChain#1
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {chain} as a subscriber to the 'prepare-csv' channel
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.channel.DirectChannel - Channel 'application:8204.prepare-csv' has 1 subscriber(s).
2015-07-14 15:45:10,969 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started org.springframework.integration.config.ConsumerEndpointFactoryBean#4
2015-07-14 15:45:10,971 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'requestMappingEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=requestMappingEndpoint]
2015-07-14 15:45:10,979 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'environmentEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=environmentEndpoint]
2015-07-14 15:45:10,986 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'healthEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=healthEndpoint]
2015-07-14 15:45:10,992 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'beansEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=beansEndpoint]
2015-07-14 15:45:10,997 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'infoEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=infoEndpoint]
2015-07-14 15:45:11,003 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'metricsEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=metricsEndpoint]
2015-07-14 15:45:11,009 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'traceEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=traceEndpoint]
2015-07-14 15:45:11,014 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'dumpEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=dumpEndpoint]
2015-07-14 15:45:11,020 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'autoConfigurationAuditEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=autoConfigurationAuditEndpoint]
2015-07-14 15:45:11,026 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'shutdownEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=shutdownEndpoint]
2015-07-14 15:45:11,032 [main] INFO [] org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter - Located managed bean 'configurationPropertiesReportEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=configurationPropertiesReportEndpoint]
2015-07-14 15:45:11,037 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2015-07-14 15:45:11,037 [main] INFO [] org.springframework.integration.channel.PublishSubscribeChannel - Channel 'application:8204.errorChannel' has 1 subscriber(s).
2015-07-14 15:45:11,037 [main] INFO [] org.springframework.integration.endpoint.EventDrivenConsumer - started _org.springframework.integration.errorLogger
2015-07-14 15:45:11,037 [main] INFO [] org.springframework.context.support.DefaultLifecycleProcessor - Starting beans in phase 2147483647
2015-07-14 15:45:11,089 [main] INFO [] org.apache.coyote.http11.Http11NioProtocol - Initializing ProtocolHandler ["http-nio-8204"]
2015-07-14 15:45:11,095 [main] INFO [] org.apache.coyote.http11.Http11NioProtocol - Starting ProtocolHandler ["http-nio-8204"]
2015-07-14 15:45:11,100 [main] INFO [] org.apache.tomcat.util.net.NioSelectorPool - Using a shared selector for servlet write/read
2015-07-14 15:45:11,112 [main] INFO [] org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer - Tomcat started on port(s): 8204 (http)
2015-07-14 15:45:11,115 [main] INFO [] com.test.myApp.reporting.service.Application - Started Application in 528.444 seconds (JVM running for 529.101)

我们在开发应用程序时遇到了很多问题，每次进行更改后，我们都需要等待8分钟来测试我们的更改。

- user804401

---

很遗憾，您的日志缺少时间信息。您的应用程序在哪个步骤卡住了？ - daniel.eichten

你可能想要包含在挂起条目之后的条目，以防它说出类似“INFO Cache warmed”之类的内容。 - user41871

抱歉，我无法理解您的意思，请您详细说明一下。 - user804401

#1 这里有一些调试应用程序的方法：将根日志级别更改为 DEBUG / CPU 分析 / 生成线程转储可以帮助确定应用程序在哪里花费了那8分钟。即使是像 visualvm（在 JDK_HOME/bin 下）这样的简单工具也可以帮助解决后两个问题。#2 应用程序无法连接到数据库，连接超时8分钟的可能性有多大？ - kaviddiss

在线程挂起时获取线程转储（在*nix上使用kill -3 $PID，在Windows控制台中使用ctl-break），并发布线程转储的链接。您要查找的是处于运行状态的线程。查看阻塞的方法，这应该能告诉您它正在等待什么。 - stringy05

Answer 1

如果你在Linux上运行应用程序，请尝试将此属性添加到java命令行中：

-Djava.security.egd=file:/dev/./urandom

E.g.:

/usr/bin/java -Xmx75m -Djava.security.egd=file:/dev/./urandom -jar app.jar

我遇到了类似的问题，虽然启动应用程序的时间不是8分钟而只有大约3分钟，但这对我解决了问题。

- yglodt

---

谢谢！这个问题已经为我解决了;-) - Jack

Answer 2

我觉得我遇到了类似的问题。在我的情况下，启动时间与数据库大小成正比。整个问题就是hibernate（我们使用hibernate-core-5.0.2-Final）从数据库中加载完整的元数据仅仅是为了获取方言值。

现在我们使用以下属性来禁用：

spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false

请确保您正确指定了“spring.jpa.database-platform”的值。

以下是JdbcEnvironmentInitiator.java文件的相关部分：

@Override
public JdbcEnvironment initiateService(Map configurationValues, ServiceRegistryImplementor registry) {
    final DialectFactory dialectFactory = registry.getService( DialectFactory.class );

    // 'hibernate.temp.use_jdbc_metadata_defaults' is a temporary magic value.
    // The need for it is intended to be alleviated with future development, thus it is
    // not defined as an Environment constant...
    //
    // it is used to control whether we should consult the JDBC metadata to determine
    // certain Settings default values; it is useful to *not* do this when the database
    // may not be available (mainly in tools usage).
    boolean useJdbcMetadata = ConfigurationHelper.getBoolean(
            "hibernate.temp.use_jdbc_metadata_defaults",
            configurationValues,
            true
    );

    if ( useJdbcMetadata ) {
        final JdbcConnectionAccess jdbcConnectionAccess = buildJdbcConnectionAccess( configurationValues, registry );
        try {
            final Connection connection = jdbcConnectionAccess.obtainConnection();
            try {
                final DatabaseMetaData dbmd = connection.getMetaData();
                if ( log.isDebugEnabled() ) {
                    log.debugf(
                            "Database ->\n"
                                    + "       name : %s\n"
                                    + "    version : %s\n"
                                    + "      major : %s\n"
                                    + "      minor : %s",
                            dbmd.getDatabaseProductName(),
                            dbmd.getDatabaseProductVersion(),
                            dbmd.getDatabaseMajorVersion(),
                            dbmd.getDatabaseMinorVersion()
                    );
                    log.debugf(
                            "Driver ->\n"
                                    + "       name : %s\n"
                                    + "    version : %s\n"
                                    + "      major : %s\n"
                                    + "      minor : %s",
                            dbmd.getDriverName(),
                            dbmd.getDriverVersion(),
                            dbmd.getDriverMajorVersion(),
                            dbmd.getDriverMinorVersion()
                    );
                    log.debugf( "JDBC version : %s.%s", dbmd.getJDBCMajorVersion(), dbmd.getJDBCMinorVersion() );
                }

                Dialect dialect = dialectFactory.buildDialect(
                        configurationValues,
                        new DialectResolutionInfoSource() {
                            @Override
                            public DialectResolutionInfo getDialectResolutionInfo() {
                                try {
                                    return new DatabaseMetaDataDialectResolutionInfoAdapter( connection.getMetaData() );
                                }
                                catch ( SQLException sqlException ) {
                                    throw new HibernateException(
                                            "Unable to access java.sql.DatabaseMetaData to determine appropriate Dialect to use",
                                            sqlException
                                    );
                                }
                            }
                        }
                );
                return new JdbcEnvironmentImpl(
                        registry,
                        dialect,
                        dbmd
                );
            }
            catch (SQLException e) {
                log.unableToObtainConnectionMetadata( e.getMessage() );
            }
            finally {
                try {
                    jdbcConnectionAccess.releaseConnection( connection );
                }
                catch (SQLException ignore) {
                }
            }
        }
        catch (Exception e) {
            log.unableToObtainConnectionToQueryMetadata( e.getMessage() );
        }
    }

    // if we get here, either we were asked to not use JDBC metadata or accessing the JDBC metadata failed.
    return new JdbcEnvironmentImpl( registry, dialectFactory.buildDialect( configurationValues, null ) );
}

- Konstantin Konyshev