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Hibernate 4 + C3P0 連接池返回錯誤

[英]Hibernate 4 + C3P0 connection pooling returns errors

 原文  2012-11-30 07:53:34  3   1    hibernate/ c3p0

問題描述

我使用帶有 C3P0 的 Hibernate 4 作為其連接提供程序。 我目前沒有使用 Spring 框架。

開發環境

Windows 7
Eclipse Juno
JRE-7
JDK -7

我使用的罐子是...

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

但在同一個 lib 路徑中也有

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

其他 jars（hibernate-c3p0-4.1.1.Final.jar 和 spring-orm-3.2.0.RC1.jar）有沒有可能對這個錯誤產生一些影響（見下文）？？

是的，整個 spring 框架 jars 都在路徑中，但我只是想先習慣休眠。 我真的不知道如何使用 Spring。 讓我們暫時把這件事留在這里。

我可以創建連接並成功查詢數據庫。 但我收到這個錯誤

就像是

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

我得到的錯誤非常重復。 他們都長這個樣子

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)

提前致謝。 如果有幾點我可以改進寫問題，請告訴我:)

編輯哎呀我忘了粘貼我的配置。 開始

<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>

1 個解決方案

解決方案1
 2 已采納  2012-12-05 03:35:42

我不知道您為什么會看到異常，但它們是 c3p0 正在清理本應被用戶關閉但沒有關閉的語句的異常。 解決問題的一種方法（這將解決問題或為您提供有關問題發生位置的更清晰的信息）是確保您的客戶端應用程序在使用語句后立即關閉它們。 當您簽入連接時（或者在這種情況下，當從池中刪除 PooledConnection 時），c3p0 會小心地為您清理未關閉的語句，但是如果發生異常，它們將在資源期間報告為異常 -清理，即在 close() 期間。 這就是你所看到的。

在 PooledConnection 被銷毀時，您如何/為什么要關閉未緩存的 Statements 有點神秘。 池不應該在檢出時嘗試 close() 一個 PooledConnection，如果它已經被檢入，則語句應該在檢入時被清除。 我將在下一個 c3p0 預發布版本的記錄器 com.mchange.v2.c3p0.impl.NewPooledConnection 中添加更多日志記錄（在 FINER/DEBUG 級別），這可能有助於跟蹤此問題。 如果有機會，請務必看一看。

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