Hibernate + c3p0 + SQL Server

Question

我使用HIBERNATE和SQL Server構建服務器。當我使用c3p0連接池並進行負載測試時，我得到java中的鎖（在c3p0中）。

在線程轉儲我看到：

at java.lang.Object.wait(Object.java:-1) 
at java.lang.Object.wait(Object.java:485) 
at com.mchange.v2.c3p0.stmt.GooGooStatementCache.acquireStatement(GooGooStatementCache.java:552) 
at com.mchange.v2.c3p0.stmt.GooGooStatementCache.checkoutStatement(GooGooStatementCache.java:168) 
at com.mchange.v2.c3p0.impl.NewPooledConnection.checkoutStatement(NewPooledConnection.java:234) 
    - locked <0x124d> (a com.mchange.v2.c3p0.impl.NewPooledConnection) 
at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:199) 
    - locked <0x124e> (a com.mchange.v2.c3p0.impl.NewProxyConnection) 
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:534) 
... 

或

at java.lang.Object.wait(Object.java:-1) 
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1315) 
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557) 
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477) 
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525) 
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128) 
at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:78) 
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) 

和一段時間的所有線程都被鎖定了。

但如果我使用內部休眠連接池 - 一切ok。我沒有看到任何鎖。但我不能使用內部hibernate連接池，因爲它不適用於生產（來自Hibernate文檔）。

有人可以幫助我，請。

Answer 1

我聽說c3p0已經死了，你最好別用別的東西。 如果你使用Tomcat，你可以去Apache Tomcat池， 否則，檢查這個線程Java JDBC connection pool library choice in 2011/2012?