使用Spring JdbcTemplate与HikariCP和JTDS连接到我正在维护的遗留代码中的MS SQL Server数据库。我试图处理应用程序启动的情况,以后因数据库变得不可用而引发连接异常的原因。
我已经有一个自定义SQL错误代码转换器(下面),它捕获jdbcTemplate抛出的许多其他异常。但是连接拒绝异常没有被捕获,即使它被封装为java.sql.SQLException(参见堆栈跟踪)。
为什么翻译没有捕获此异常?
public class CustomSqlErrorCodeTranslator extends
SQLErrorCodeSQLExceptionTranslator {
private final Log log = LogFactory.getLog(getClass());
@Override
protected DataAccessException customTranslate
(String task, String sql, SQLException sqlException) {
/*
* We want to capture all codes.
*/
StringBuilder logMsg = new StringBuilder("*********************SQL Exception:");
logMsg.append(", errorCode: " + sqlException.getErrorCode())
.append(", message: " + sqlException.getMessage())
;
log.error(logMsg.toString());
return null;
}
}
public class Dao {
//HikariDataSource dataSource;
DataSource dataSource;
protected JdbcTemplate jdbcTemplate;
private final Log log = LogFactory.getLog(getClass());
private boolean connected = false;
private CustomSqlErrorCodeTranslator exceptionHandler;
public void setDataSource(DataSource ds) {
//this.jdbcTemplate = new JdbcTemplate(ds);
try {
this.jdbcTemplate = new JdbcTemplate(ds);
exceptionHandler = new CustomSqlErrorCodeTranslator();
this.jdbcTemplate.setExceptionTranslator(exceptionHandler);
connected = true;
} catch (Exception e) {
if (e.getCause() != null && e.getCause() instanceof SQLException) {
log.error("******Cannot connect to database.***************************");
log.debug(e.getMessage());
}
}
}
}
16:59:33,542 [main] WARN PoolBase - springHikariCP - Connection net.sourceforge.jtds.jdbc.JtdsConnection@42206bce failed alive test with exception I/O Error: Connection reset by peer: socket write error
16:59:33,542 [Hikari connection closer (pool springHikariCP)] DEBUG PoolBase - springHikariCP - Closing connection net.sourceforge.jtds.jdbc.JtdsConnection@42206bce: (connection evicted or dead)
16:59:34,530 [main] DEBUG HikariPool - Timeout failure pool springHikariCP stats (total=0, active=0, idle=0, waiting=0)
16:59:34,544 [Hikari connection adder (pool springHikariCP)] DEBUG HikariPool - springHikariCP - Cannot acquire connection from data source
java.sql.SQLException: Network error IOException: Connection refused: connect
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:314)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:171)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:436)
at com.zaxxer.hikari.pool.HikariPool.access$500(HikariPool.java:65)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:567)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:560)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:288)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331)
... 13 more
16:59:35,746 [Hikari connection adder (pool springHikariCP)] DEBUG HikariPool - springHikariCP - Cannot acquire connection from data source
java.sql.SQLException: Network error IOException: Connection refused: connect
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:314)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:171)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:436)
at com.zaxxer.hikari.pool.HikariPool.access$500(HikariPool.java:65)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:567)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:560)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:288)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331)
... 13 more
16:59:37,010 [Hikari connection adder (pool springHikariCP)] DEBUG HikariPool - springHikariCP - Cannot acquire connection from data source
很抱歉,我花了很长时间才意识到我需要添加到堆栈跟踪。
这是我停止数据库时的堆栈跟踪。现在很明显涉及到JDBC模板。如果涉及JdbcTemplate,我觉得自定义异常处理程序应该选择它。有没有其他人有使用自定义错误代码转换器捕获数据库连接异常的经验?
5:06:05,076 [ActiveMQ Session Task-1] DEBUG HikariPool - Timeout failure pool HikariPool-0 stats (total=1, active=1, idle=0, waiting=2)
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 10000ms.
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:615)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:866)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:927)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:937)
at com.pevco.persist.resources.AvailabilityDaoImpl.create(AvailabilityDaoImpl.java:51)
at com.pevco.nexgen.health.handlers.SystemModelListener.onMessage(SystemModelListener.java:135)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:746)
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:684)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:651)
at org.springframework.jms.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:622)
at org.springframework.jms.listener.SimpleMessageListenerContainer.processMessage(SimpleMessageListenerContainer.java:330)
at org.springframework.jms.listener.SimpleMessageListenerContainer$2.onMessage(SimpleMessageListenerContainer.java:306)
at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1321)
at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 10000ms.
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:195)
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:147)
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:83)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 20 more
Caused by: java.sql.SQLException: Network error IOException: Connection refused: connect
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:314)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:171)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:436)
at com.zaxxer.hikari.pool.HikariPool.access$500(HikariPool.java:65)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:567)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:560)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
... 3 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:288)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331)
... 12 more
15:06:06,217 [ActiveMQ Session Task-1] DEBUG HikariPool - Timeout failure pool HikariPool-0 stats (total=1, active=1, idle=0, waiting=2)
15:06:06,217 [ActiveMQ Session Task-1] WARN SimpleMessageListenerContainer - Execution of JMS message listener failed, and no ErrorHandler has been set.
(我会在时间到期之前奖励赏金,但希望得到准确的答案。)
答案 0 :(得分:1)
问题是因为Hikari组件正在询问连接。可能Hikari失去了联系,它正试图重新连接。
在日志中没有任何与JdbcTemplate相关的部分。这是因为问题是由重新连接尝试引起的,而不是因为新事务。
如果事务没有通过模板,则永远不会调用错误转换器。抛出异常的事件不会被业务逻辑触发。它由Hikari的重新连接或创建连接功能触发。
答案 1 :(得分:1)
正如“reos”指出的那样,堆栈跟踪中没有与JdbcTemplate相关的内容。这意味着您尝试在JdbcTemplate外部打开连接。
即使您使用了JdbcTemplate,也不会转换异常。看看execute method in the source code。如果数据源无法获得连接,则它们不使用自定义异常转换程序。