Question

当我将hibernate lib从hibernate 3升级到hibernate core 4.3.6并添加了c3p0-0.9.2.1.jar时，我遇到了这个问题。我的休眠连接没有建立。在线程堆栈跟踪中得到以下内容：

"pool-9-thread-11" prio=6 tid=0x00000000147dd000 nid=0xd20 in Object.wait() [0x0000000018dee000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000701ac0608> (a com.mchange.v2.resourcepool.BasicResourcePool)
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1414)
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
    - locked <0x0000000701ac0608> (a com.mchange.v2.resourcepool.BasicResourcePool)
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
    at org.hibernate.c3p0.internal.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:89)
    at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380)
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228)
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:67)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162)
    at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
    at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
   Locked ownable synchronizers:
    - 0x00000007b5530978> (a java.util.concurrent.ThreadPoolExecutor$Worker)

有关如何解决此问题的任何建议??

Answer 1

我认为你不需要添加：

c3p0-0.9.2.1.jar

您应该添加hibernate-c3p0依赖项，让Maven为您计算所有需要的依赖项：

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-c3p0</artifactId>
    <version>4.3.6.Final</version>
</dependency>

因此，在设置此依赖项并运行mvn：dependency：tree之后，您应该得到类似的内容：

D:\wrk\vladmihalcea\hibernate-master-class\core>mvn dependency:tree
[WARNING]
[WARNING] Some problems were encountered while building the effective settings
[WARNING] 'usePluginRegistry' is deprecated and has no effect. @ C:\apache-maven-3.1.0\conf\settings.xml
[WARNING]
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building hibernate-master-class-core 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ hibernate-master-class-core ---
[INFO] com.vladmihalcea:hibernate-master-class-core:jar:1.0-SNAPSHOT
[INFO] +- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] +- ch.qos.logback:logback-classic:jar:1.1.2:compile
[INFO] |  \- ch.qos.logback:logback-core:jar:1.1.2:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.3.2:compile
[INFO] +- org.hibernate:hibernate-core:jar:4.3.6.Final:compile
[INFO] |  +- org.jboss.logging:jboss-logging:jar:3.1.3.GA:compile
[INFO] |  +- org.jboss.logging:jboss-logging-annotations:jar:1.2.0.Beta1:compile
[INFO] |  +- org.jboss.spec.javax.transaction:jboss-transaction-api_1.2_spec:jar:1.0.0.Final:compile
[INFO] |  +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |  |  \- xml-apis:xml-apis:jar:1.0.b2:compile
[INFO] |  +- org.hibernate.common:hibernate-commons-annotations:jar:4.0.5.Final:compile
[INFO] |  +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] |  +- org.javassist:javassist:jar:3.18.1-GA:compile
[INFO] |  +- antlr:antlr:jar:2.7.7:compile
[INFO] |  \- org.jboss:jandex:jar:1.1.0.Final:compile
[INFO] +- org.hibernate:hibernate-c3p0:jar:4.3.6.Final:compile
[INFO] |  \- com.mchange:c3p0:jar:0.9.2.1:compile
[INFO] |     \- com.mchange:mchange-commons-java:jar:0.2.3.4:compile
[INFO] +- org.hibernate:hibernate-entitymanager:jar:4.3.6.Final:compile
[INFO] +- net.ttddyy:datasource-proxy:jar:1.2.1:compile
[INFO] +- org.hsqldb:hsqldb:jar:2.3.2:test
[INFO] \- junit:junit:jar:4.11:test
[INFO]    \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] ------------------------------------------------------------------------

hibernate-c3p0还带来了com.mchange：c3p0：jar：0.9.2.1和com.mchange：mchange-commons-java：jar：0.2.3.4：

[INFO] +- org.hibernate:hibernate-c3p0:jar:4.3.6.Final:compile
[INFO] |  \- com.mchange:c3p0:jar:0.9.2.1:compile
[INFO] |     \- com.mchange:mchange-commons-java:jar:0.2.3.4:compile

线程堆栈跟踪和hibernate连接中的com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable未建立

1 个答案: