java - PSQL异常 : This connection has been closed - Spring Boot + AWS RDS + Postgres

Question

我在尝试访问 AWS RDS 中的 Postgres 数据库时收到 PSQLException: This connection has been closed。异常是随机发生的(不是我每次运行代码时)，如果在执行到下面的代码之前需要一段时间，则更有可能发生异常:

@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();
                }
            });

连接内容:

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

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

相关 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>

堆栈跟踪:

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

看起来数据库和池之间的连接丢失了。尝试设置 removeAbandoned 和 removeAbandonedTimeout 选项。有关这些选项的更多信息，请阅读 JDBC Connection Pool docs .