我们遇到了 Java 应用程序和 PostgreSQL 8.3 服务器之间随机断开连接的问题，并出现“坏记录 MAC”SSL 错误。
我们两边都运行 Debian / Lenny。在客户端，我们看到：
main, WRITE: TLSv1 Application Data, length = 104
main, READ: TLSv1 Application Data, length = 24
main, READ: TLSv1 Application Data, length = 104
main, WRITE: TLSv1 Application Data, length = 384
main, READ: TLSv1 Application Data, length = 24
main, READ: TLSv1 Application Data, length = 8216
%% Invalidated: [Session-1, SSL_RSA_WITH_3DES_EDE_CBC_SHA]
main, SEND TLSv1 ALERT: fatal, description = bad_record_mac
main, WRITE: TLSv1 Alert, length = 24
main, called closeSocket()
main, handling exception: javax.net.ssl.SSLException: bad record MAC
2010-03-09 02:36:27,980 WARN org.hibernate.util.JDBCExceptionReporter.logExceptions(JDBCExceptionReporter.java:100) - SQL Error: 0, SQLState: 08006
2010-03-09 02:36:27,980 ERROR org.hibernate.util.JDBCExceptionReporter.logExceptions(JDBCExceptionReporter.java:101) - An I/O error occured while sending to the backend.
2010-03-09 02:36:27,981 ERROR org.hibernate.transaction.JDBCTransaction.toggleAutoCommit(JDBCTransaction.java:232) - Could not toggle autocommit
org.postgresql.util.PSQLException: An I/O error occured while sending to the backend.
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:220)
at org.postgresql.jdbc2.AbstractJdbc2Connection.executeTransactionCommand(AbstractJdbc2Connection.java:650)
at org.postgresql.jdbc2.AbstractJdbc2Connection.commit(AbstractJdbc2Connection.java:670)
at org.postgresql.jdbc2.AbstractJdbc2Connection.setAutoCommit(AbstractJdbc2Connection.java:633)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.jdbc.datasource.SingleConnectionDataSource$CloseSuppressingInvocationHandler.invoke(SingleConnectionDataSource.java:336)
at $Proxy17.setAutoCommit(Unknown Source)
at org.hibernate.transaction.JDBCTransaction.toggleAutoCommit(JDBCTransaction.java:228)
at org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:220)
at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:196)
at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:85)
at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:482)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:823)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:800)
at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:339)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)
...
Caused by: javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLException: bad record MAC
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1255)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1267)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:43)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at org.postgresql.core.PGStream.flush(PGStream.java:508)
at org.postgresql.core.v3.QueryExecutorImpl.sendSync(QueryExecutorImpl.java:692)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:193)
... 22 more
Caused by: javax.net.ssl.SSLException: bad record MAC
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1611)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1569)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:850)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:746)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:135)
at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:104)
at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:186)
at org.postgresql.core.PGStream.Receive(PGStream.java:445)
at org.postgresql.core.PGStream.ReceiveTupleV3(PGStream.java:350)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1322)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:194)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1808)
at org.hibernate.loader.Loader.doQuery(Loader.java:697)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2015)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1743)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366)
at org.hibernate.collection.PersistentSet.add(PersistentSet.java:212)
...
使用了密码套件 SSL_RSA_WITH_3DES_EDE_CBC_SHA 或 SSL_RSA_WITH_RC4_128_SHA。
我们在客户端尝试过：
- OpenJDK 包
- Sun JDK 包
- 太阳焦油包
- libbcprov-java 包
- PostgreSQL 驱动程序 8.3 而不是 8.4
在服务器端我们看到：
2010-03-01 08:26:05 CET [18513]: [161833-1] LOG: SSL error: sslv3 alert bad record mac
2010-03-01 08:26:05 CET [18513]: [161834-1] LOG: could not receive data from client: Connection reset by peer
2010-03-01 08:26:05 CET [18513]: [161835-1] LOG: unexpected EOF on client connection
错误类型似乎是 SSL_R_ SSLV3_ALERT_BAD_RECORD_MAC。
SSL 层配置为：
ssl_ciphers = '全部:!ADH:!低:!EXP:!MD5:@STRENGTH'
在服务器端，我们将密码套件更改为：
'全部:!SSLv2:!中:!AES:!ADH:!低:!EXP:!MD5:@STRENGTH'
但这些改变都没有解决问题。建议表示赞赏！
