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我使用 SpringBoot 1.5.10.RELEASE，Postgre Server 9.6，驱动程序版本是 9.4.1212.jre7，tomcat-jdbc（spring bom 版本）。

这是配置 JPA ：

  • spring.datasource.driver-class-name=org.postgresql.Driver
  • spring.jpa.hibernate.ddl-auto=none
  • spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect

Java代码是：

AssureMaladieController.java

@BasePathAwareController 
public class AssureMaladieController {

@Autowired
IAssureMaladieService assureMaladieService;

@Autowired
RepositoryEntityLinks repositoryEntityLinks;


@RequestMapping(value = "/assures/{id}/reglements/find", method = RequestMethod.GET)
@ResponseBody
public ResponseEntity<AbstractSupport> getReglements(@PathVariable Long id, @RequestParam EnumTypeReglement typeReglement, @RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd") Date date ) {
    log.trace("entrée dans getReglements")
    List<Reglement> reglements =assureMaladieService.getReglementsAfter(id,typeReglement, date);
}

AssureMaladieService.java

@Service
public class AssureMaladieService implements IAssureMaladieService{

@Autowired
private ReglementRepository reglementRepository;

@Transactional
public List<Reglement> getReglementsAfter(Long idAssure, EnumTypeReglement typeReglement, Date dateDebut){
    log.trace("entrée dans getReglementsAfter")
    if (personnePhysiqueRepository.findOne(idAssure)== null){
        throw new RessourceNonTrouveeException();
    }
    List<Reglement> reglements= reglementRepository.findByAssureMaladie_IdAndTypeReglement_CodeAndDateGreaterThanEqualOrderByDateDesc(idAssure,typeReglement,dateDebut);

    return reglements;
}

ReglementRepository.java

import org.springframework.data.repository.CrudRepository;

@RepositoryRestResource(path="reglements")
public interface ReglementRepository extends CrudRepository<Reglement,Long> {    

    @Override
    @PostAuthorize("(returnObject!=null?hasPermission(returnObject.assureMaladie.matricule, 'maladie','R'):true)")
    Reglement findOne(@Param("id")Long var1);
}

有时，JPA 从一等到二等需要几分钟

在异常情况下，日志是：

2018-09-13 14:36:54.826 DEBUG 21979 --- [http-nio-8001-exec-9] n.c.g.c.i.c.AssureMaladieController      : entrée dans getReglements avec les id : 484608 type règlement : ASSURE date : Mon Aug 13 00:00:00 NCT 2018
2018-09-13 14:36:54.826 DEBUG 21979 --- [http-nio-8001-exec-9] o.s.orm.jpa.JpaTransactionManager        : Creating new transaction with name [nc.cafat.gen.cli.impl.service.AssureMaladieService.getReglementsAfter]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
2018-09-13 14:36:54.826 DEBUG 21979 --- [http-nio-8001-exec-9] o.s.orm.jpa.JpaTransactionManager        : Opened new EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1cf1ad2a] for JPA transaction
2018-09-13 14:52:32.272 DEBUG 21979 --- [http-nio-8001-exec-9] o.s.orm.jpa.JpaTransactionManager        : Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@665fa46c]
2018-09-13 14:52:32.273 TRACE 21979 --- [http-nio-8001-exec-9] .s.t.s.TransactionSynchronizationManager : Bound value [org.springframework.jdbc.datasource.ConnectionHolder@7329c08c] for key [org.apache.tomcat.jdbc.pool.DataSource@4165b803{ConnectionPool[defaultAutoCommit=null; defaultReadOnly=null; defaultTransactionIsolation=-1; defaultCatalog=null; driverClassName=org.postgresql.Driver; maxActive=100; maxIdle=100; minIdle=10; initialSize=10; maxWait=30000; testOnBorrow=true; testOnReturn=false; timeBetweenEvictionRunsMillis=5000; numTestsPerEvictionRun=0; minEvictableIdleTimeMillis=60000; testWhileIdle=false; testOnConnect=false; password=********; url=jdbc:postgresql://DBPG-PRD-80:5432/prd_cafat_01; username=prdcafatuser; validationQuery=SELECT 1; validationQueryTimeout=-1; validatorClassName=null; validationInterval=3000; accessToUnderlyingConnectionAllowed=true; removeAbandoned=false; removeAbandonedTimeout=60; logAbandoned=false; connectionProperties=null; initSQL=null; jdbcInterceptors=null; jmxEnabled=true; fairQueue=true; useEquals=true; abandonWhenPercentageFull=0; maxAge=0; useLock=false; dataSource=null; dataSourceJNDI=null; suspectTimeout=0; alternateUsernameAllowed=false; commitOnReturn=false; rollbackOnReturn=false; useDisposableConnectionFacade=true; logValidationErrors=false; propagateInterruptState=false; ignoreExceptionOnPreLoad=false; useStatementFacade=true; }] to thread [http-nio-8001-exec-9]
2018-09-13 14:52:32.273 TRACE 21979 --- [http-nio-8001-exec-9] .s.t.s.TransactionSynchronizationManager : Bound value [org.springframework.orm.jpa.EntityManagerHolder@189284e4] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@30d8f1e5] to thread [http-nio-8001-exec-9]
2018-09-13 14:52:32.273 TRACE 21979 --- [http-nio-8001-exec-9] .s.t.s.TransactionSynchronizationManager : Initializing transaction synchronization
2018-09-13 14:52:32.273 TRACE 21979 --- [http-nio-8001-exec-9] o.s.t.i.TransactionInterceptor           : Getting transaction for [nc.cafat.gen.cli.impl.service.AssureMaladieService.getReglementsAfter]
2018-09-13 14:52:32.273 DEBUG 21979 --- [http-nio-8001-exec-9] n.c.g.c.i.service.AssureMaladieService   : entrée dans getReglementsAfter avec les idAssure : 484608 type règlement : ASSURE dateDebut : Mon Aug 13 00:00:00 NCT 2018

超过15分钟！

在正常情况下，日志是：

2018-09-13 14:56:47.796 DEBUG 21979 --- [http-nio-8001-exec-6] n.c.g.c.i.c.AssureMaladieController      : entrée dans getReglements avec les id : 484608 type règlement : ASSURE date : Mon Aug 13 00:00:00 NCT 2018
2018-09-13 14:56:47.796 DEBUG 21979 --- [http-nio-8001-exec-6] o.s.orm.jpa.JpaTransactionManager        : Creating new transaction with name [nc.cafat.gen.cli.impl.service.AssureMaladieService.getReglementsAfter]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
2018-09-13 14:56:47.797 DEBUG 21979 --- [http-nio-8001-exec-6] o.s.orm.jpa.JpaTransactionManager        : Opened new EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@36b59887] for JPA transaction
2018-09-13 14:56:47.797 DEBUG 21979 --- [http-nio-8001-exec-6] o.s.orm.jpa.JpaTransactionManager        : Exposing JPA transaction as JDBC transaction 
2018-09-13 14:56:47.798 TRACE 21979 --- [http-nio-8001-exec-6] .s.t.s.TransactionSynchronizationManager : Bound value [org.springframework.jdbc.datasource.ConnectionHolder@62337496] for key [org.apache.tomcat.jdbc.pool.DataSource@4165b803{ConnectionPool[defaultAutoCommit=null; defaultReadOnly=null; defaultTransactionIsolation=-1; defaultCatalog=null; driverClassName=org.postgresql.Driver; maxActive=100; maxIdle=100; minIdle=10; initialSize=10; maxWait=30000; testOnBorrow=true; testOnReturn=false; timeBetweenEvictionRunsMillis=5000; numTestsPerEvictionRun=0; minEvictableIdleTimeMillis=60000; testWhileIdle=false; testOnConnect=false; ; username=prdcafatuser; validationQuery=SELECT 1; validationQueryTimeout=-1; validatorClassName=null; validationInterval=3000; accessToUnderlyingConnectionAllowed=true; removeAbandoned=false; removeAbandonedTimeout=60; logAbandoned=false; connectionProperties=null; initSQL=null; jdbcInterceptors=null; jmxEnabled=true; fairQueue=true; useEquals=true; abandonWhenPercentageFull=0; maxAge=0; useLock=false; dataSource=null; dataSourceJNDI=null; suspectTimeout=0; alternateUsernameAllowed=false; commitOnReturn=false; rollbackOnReturn=false; useDisposableConnectionFacade=true; logValidationErrors=false; propagateInterruptState=false; ignoreExceptionOnPreLoad=false; useStatementFacade=true; }] to thread [http-nio-8001-exec-6]
2018-09-13 14:56:47.798 TRACE 21979 --- [http-nio-8001-exec-6] .s.t.s.TransactionSynchronizationManager : Bound value [org.springframework.orm.jpa.EntityManagerHolder@4961b514] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@30d8f1e5] to thread [http-nio-8001-exec-6]
2018-09-13 14:56:47.798 TRACE 21979 --- [http-nio-8001-exec-6] .s.t.s.TransactionSynchronizationManager : Initializing transaction synchronization
2018-09-13 14:56:47.798 TRACE 21979 --- [http-nio-8001-exec-6] o.s.t.i.TransactionInterceptor           : Getting transaction for [nc.cafat.gen.cli.impl.service.AssureMaladieService.getReglementsAfter]
2018-09-13 14:56:47.798 DEBUG 21979 --- [http-nio-8001-exec-6] n.c.g.c.i.service.AssureMaladieService   : entrée dans getReglementsAfter avec les idAssure : 484608 type règlement : ASSURE dateDebut : Mon Aug 13 00:00:00 NCT 2018

Visual VM 确认线程在 CPU 中需要 15 分钟（945160 ~ 15m45s）

CPU时间

更多参与的行是由 socket read 上的驱动程序：

套接字读取

这篇文章似乎与同样的问题有关：https ://github.com/brettwooldridge/HikariCP/issues/603

我们正在尝试这个：

  • 从 tomcat-jdbc 切换到 hikari 3.2.0（似乎从 2.6.2 开始对此进行了修复）
  • 将 jdbc PG 驱动程序从 9.4 更新到 42.2.5

（升级到 spring 2.0 会更容易，但我们面临另一个迁移问题）

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