PSQLException：此連接已關閉 - Spring Boot + AWS RDS + Postgres

Question

嘗試訪問AWS RDS中的Postgres數據庫時，我得到了PSQLException: This connection has been closed。唯一的例外隨機發生的（不是所有我運行代碼的時間），它是更可能的，如果它需要一段時間才能執行到達下面的代碼發生：

@Transactional 
public void revokeChanges(ArrayList<Integer> changeIds) { 
    jdbcTemplate.batchUpdate(sqlUpdate, 
      new BatchPreparedStatementSetter() { 
       @Override 
       public void setValues(PreparedStatement ps, int i) throws SQLException { 
        ps.setStuff.. 
        ... 
       } 
       @Override 
       public int getBatchSize() { 
        return changeIds.size(); 
       } 
      }); 
    jdbcTemplate.batchUpdate(sqlInsert, 
      new BatchPreparedStatementSetter() { 
       @Override 
       public void setValues(PreparedStatement ps, int i) throws SQLException { 
        ps.setStuff... 
       } 
       @Override 
       public int getBatchSize() { 
        return changeIds.size(); 
       } 
      }); 

連接東西：

spring.datasource.url=jdbc:postgresql://my-url:port/dbName?tcpKeepAlive=true&autoReconnect=true

spring.datasource.driver-class-name=org.postgresql.Driver

相關POM：

<parent> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-parent</artifactId> 
    <version>1.1.9.RELEASE</version> 
</parent> 

<dependencies> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-jdbc</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.postgresql</groupId> 
     <artifactId>postgresql</artifactId> 
     <version>9.3-1102-jdbc41</version> 
    </dependency> 

堆棧跟蹤：

 
org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is org.postgresql.util.PSQLException: This connection has been closed. 
    at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:296) 
    at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:320) 
    at org.springframework.jdbc.support.SQLErrorCodesFactory.getErrorCodes(SQLErrorCodesFactory.java:214) 
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.setDataSource(SQLErrorCodeSQLExceptionTranslator.java:134) 
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.(SQLErrorCodeSQLExceptionTranslator.java:97) 
    at org.springframework.jdbc.support.JdbcAccessor.getExceptionTranslator(JdbcAccessor.java:99) 
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:660) 
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:673) 
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:989) 
    at my.package.DataServiceJdbc.revokeChanges(DataServiceJdbc.java:71) 
    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:483) 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) 
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) 
    at com.sun.proxy.$Proxy24.revokeChanges(Unknown Source) 
    at my.package.DataExporterS3ToPostgre.exportData(DataExporterS3ToPostgre.java:59) 
    at my.package.Application.main(Application.java:41) 
    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:483) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134) 
Caused by: org.postgresql.util.PSQLException: This connection has been closed. 
    at org.postgresql.jdbc2.AbstractJdbc2Connection.checkClosed(AbstractJdbc2Connection.java:843) 
    at org.postgresql.jdbc4.Jdbc4Connection.getMetaData(Jdbc4Connection.java:54) 
    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:483) 
    at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) 
    at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109) 
    at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:80) 
    at com.sun.proxy.$Proxy23.getMetaData(Unknown Source) 
    at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:285) 
    ... 29 common frames omitted 

Answer 1

它看起來像連接DB和游泳池之間丟失。嘗試設置removeAbandoned和removeAbandonedTimeout選項。有關這些選項的更多信息，請參閱JDBC Connection Pool docs。