大家好我有一个使用Hibernate检索数据库中的数据的Web应用程序.在服务器端,一些例外定期出现.以下是异常日志.
16:04:22,227 DEBUG NewPooledConnection:491 - com.mchange.v2.c3p0.impl.NewPooledConnection@ef46613 closed by a client.
java.lang.Exception: DEBUG -- CLOSE BY CLIENT STACK TRACE
at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:491)
at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:191)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:470)
at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:964)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
16:09:42,310 DEBUG C3P0PooledConnectionPool:476 - Successfully destroyed PooledConnection: com.mchange.v2.c3p0.impl.NewPooledConnection@32ef0763
16:09:42,310 DEBUG BasicResourcePool:967 - Successfully destroyed resource: com.mchange.v2.c3p0.impl.NewPooledConnection@32ef0763
16:09:42,310 DEBUG GooGooStatementCache:319 - ENTER METHOD: closeAll( org.postgresql.jdbc4.Jdbc4Connection@42df0af8 )! -- num_connections: 1
任何人都可以帮我解决这个问题吗？非常感谢!
谁能告诉我C的短路范围是否在不同的机器上有所不同.例如,如果一个短路是2个字节,并且在1的补码机器中,短路的范围将-32767 ~ 32767在2的补码机器中,范围将是-32768 ~ 32767.提前致谢.