在linux下用c3p0连接mysql报错

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在linux下用c3p0连接mysql报错：
   root cause

java.sql.SQLException: An SQLException was provoked by the following failure: com.mchange.v2.resourcepool.ResourcePoolException: A ResourcePool could not acquire a resource from its primary factory or source.
com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:68)
com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:57)
com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:213)
com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:64)
com.mchange.v2.c3p0.ComboPooledDataSource.getConnection(ComboPooledDataSource.java:464)
org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:112)
org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:292)
org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:366)
org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:374)
org.springframework.jdbc.core.JdbcTemplate.queryForList(JdbcTemplate.java:405)
cn.com.uncc.database.JdbcTool.queryForList(JdbcTool.java:65)
org.apache.jsp.kexueyanjiu_jsp._jspService(kexueyanjiu_jsp.java:183)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
以前是没问题的，但自从双机备份后重装系统后就不行了，但在其他机器上是没问题的，还有如果用Jdbc最基本的方法是可以连接的，也可以得到数据，可是用从c3p0就是不行，一点头绪都没有，郁闷！