Hibernate 4+ C3P0连接池返回错误

Question

我使用Hibernate 4和C3P0作为它的连接提供者。我目前没有使用Spring框架。

开发环境

Windows 7
Eclipse Juno
JRE-7
JDK -7

我正在使用的jars是...

hibernate-core-4.1.7.Final.jar
c3p0-0.9.2-pre6.jar
jtds-1.3.0.jar

但是在相同的lib路径中，还有

hibernate-c3p0-4.1.1.Final.jar
spring-orm-3.2.0.RC1.jar

这些其他jar(hibernate-C3p0-4.1.1.Final.jar和spring-orm-3.2.0.RC1.jar)是否有可能对这个错误产生一些影响(见下文)？

是的，整个spring框架jars都在路上，但我只是想先习惯hibernate。我还不知道如何使用Spring。让我们暂时把这个问题留在这里。

我可以成功地创建连接并对数据库进行查询。但是我得到了这个错误

就像这样

Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@4d0106e5

和

WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@4d0106e5

我得到的错误是相当重复的。它们看起来都像这样

11월 30, 2012 4:39:59 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:39:59 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:39:59 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@4d0106e5
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@4d0106e5
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:17 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:17 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:17 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@40a4d015
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@40a4d015
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:17 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:17 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:17 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@2ee657fa
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@2ee657fa
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:18 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:18 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:18 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@51b2f91b
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@51b2f91b
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:19 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:19 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:19 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@7bb39e5e
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@7bb39e5e
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:21 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:21 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:21 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@155767ad
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@155767ad
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:22 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@299bdc58
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@299bdc58
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:22 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@550a9854
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@550a9854
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] Exceptions occurred while trying to close a PooledConnection's resources normally.
11월 30, 2012 4:42:22 오후 com.mchange.v2.c3p0.impl.NewPooledConnection logCloseExceptions
INFO: [c3p0] NewPooledConnection close Exception.
java.sql.SQLException: I/O Error: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2388)
    at net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:736)
    at net.sourceforge.jtds.jdbc.JtdsStatement.reset(JtdsStatement.java:722)
    at net.sourceforge.jtds.jdbc.JtdsStatement.close(JtdsStatement.java:966)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.cleanupUncachedStatements(NewPooledConnection.java:718)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:592)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)
Caused by: java.io.IOException: Stream 2 attempting to read when no request has been sent
    at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:755)
    at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
    at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
    at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2282)
    ... 9 more

11월 30, 2012 4:42:22 오후 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask run
WARNING: Failed to destroy resource: com.mchange.v2.c3p0.impl.NewPooledConnection@67a80f8e
java.sql.SQLException: Some resources failed to close properly while closing com.mchange.v2.c3p0.impl.NewPooledConnection@67a80f8e
    at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:638)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:247)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:607)
    at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1012)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636)

提前谢谢。如果有几点我可以改进写一个问题，请告诉我：)

编辑糟糕，我忘记粘贴我的配置了。开始吧

<hibernate-configuration>

<session-factory>

 <!-- Database connection settings -->
 <property name="connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
 <!--  -->

 <!-- JDBC connection pool (use the built-in) -->
 <property name="connection.pool_size">5</property>

 <!-- connection pooling -->

        <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
        <!-- 
        <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>        
         -->
        <property name="hibernate.c3p0.acquire_increment" >1</property>
        <property name="hibernate.c3p0.idle_test_period">30</property>
        <property name="hibernate.c3p0.min_size">1</property>
        <property name="hibernate.c3p0.max_size">2</property>
        <property name="hibernate.c3p0.max_statements">50</property>
        <property name="hibernate.c3p0.timeout">60</property>

        <!-- 
        <property name="hibernate.c3p0.acquireRetryAttempts">1</property>
        <property name="hibernate.c3p0.acquireRetryDelay">250</property>
         -->

 <!-- SQL dialect -->
 <!--  
 <property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
 -->

 <!-- Enable Hibernate's automatic session context management -->
 <property name="current_session_context_class">thread</property>

 <!-- Disable the second-level cache -->
 <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

 <!-- Echo all executed SQL to stdout -->
 <property name="show_sql">true</property>

 <!-- Drop and re-create the database schema on startup -->
 <!-- <property name="hbm2ddl.auto">update</property> -->

 <!-- Mapping files -->
 <mapping resource="standard.hbm.xml"/>
 <mapping resource="revisionedFile.hbm.xml"/>
 <mapping resource="keyword.hbm.xml"/>  
 <mapping resource="device.hbm.xml"/>
 <mapping resource="reference.hbm.xml"/>
 <mapping resource="commonSpecification.hbm.xml"/>
 <mapping resource="item.hbm.xml"/>
 <mapping resource="superItem.hbm.xml"/>
 <mapping resource="defaultURLResource.hbm.xml" />
 <mapping resource="test.hbm.xml"/>

  <!--  Enver Listeners -->
   <listener class="org.hibernate.envers.event.AuditEventListener" type="post-insert"/>
   <listener class="org.hibernate.envers.event.AuditEventListener" type="post-update"/>
   <listener class="org.hibernate.envers.event.AuditEventListener" type="post-delete"/>
   <listener class="org.hibernate.envers.event.AuditEventListener" type="pre-collection-update"/>
   <listener class="org.hibernate.envers.event.AuditEventListener" type="pre-collection-remove"/>
   <listener class="org.hibernate.envers.event.AuditEventListener" type="post-collection-recreate"/>


</session-factory>

</hibernate-configuration>  

Answer 1

我不知道您为什么会看到这些异常，但它们是c3p0正在清理本应由用户关闭但却没有关闭的语句的异常。解决该问题的一种方法是确保客户端应用程序在使用语句后立即关闭语句(这将解决问题，或者为您提供有关问题发生位置的更清晰信息)。当您签入连接时(或者在这种情况下，当从池中删除PooledConnection时)，c3p0会小心地为您清理未关闭的语句，但如果发生异常，它们将在资源清理过程中报告为异常，即在close()期间。这就是你所看到的。

在PooledConnection被销毁的同时，如何/为什么会有未缓存的语句需要关闭，这有点令人费解。池不应该在PooledConnection签出时尝试关闭()它，如果它已经签入，那么语句应该在签入时被清除。在c3p0的下一个预发布版本中，我将在记录器com.mchange.v2.c3p0.impl.NewPooledConnection中添加更多的日志记录(在更好的/调试级别)，这可能有助于跟踪这个问题。如果你有机会，请一定要看一下。