使用c3p0在Hibernate中进行客户端堆栈跟踪 [英] CLIENT STACK TRACE in Hibernate using c3p0

问题描述

这可能是>奇怪的错误:通过客户堆栈跟踪CLOSE 但我问了一个新问题，因为我看不到Log的isLoggable方法.我将org.apache.log4j.Logger的Logger类用于我的日志目的.

This may be a duplicate of Weird Error: CLOSE BY CLIENT STACK TRACE But I've asked a new question because I don't see isLoggable method for Log. I'm using Logger class of org.apache.log4j.Logger for my log purpose.

我的错误是相同的

java.lang.Exception: DEBUG -- CLOSE BY CLIENT STACK TRACE
at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:566)
at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:234)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:470)
at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:964)

我的代码是

    public JSONObject getUserDetails(int id) {
    System.setProperty("net.sf.ehcache.skipUpdateCheck", "true");
    long lStartTime = new Date().getTime();
    JSONObject obj = new JSONObject();
    try (Session session = factory.openSession()) {
        Employee emp = (Employee) session.load(Employee.class, id);
        if (emp != null) {
            obj.put("id", emp.getId());
            obj.put("name", emp.getName());
        }
        long lEndTime = new Date().getTime();
        log.info("[ Personal Details ]Time elapsed For Fetching :"
                + (lEndTime - lStartTime));

    } catch (Exception e) {
        log.error(e);
    }
    return obj;
}

我的专长是:

public class PersonalisationImpl implements PersonalisationDao {
private void close( Throwable cause ) throws SQLException
{ 
    close( cause, false ); 
}

private void close(Throwable cause, boolean b) {
    // TODO Auto-generated method stub
    assert Thread.holdsLock( this );
    if ( logger.isLoggable( MLevel.FINEST ) )
          logger.log( MLevel.FINEST, this + " closed by a client.", 
                    new Exception("DEBUG -- CLOSE BY CLIENT STACK TRACE") );
}

在代码中应该在哪里编写isLoggable方法的方法，应该使用哪个logger类?

Where should I write the method of isLoggable method in the code and which logger class should I use?

推荐答案

您没有编写isLoggable(...)方法.日志库中已经存在的文件，并且c3p0对其进行了调用.

you don't write an isLoggable(...) method. that already exists in the logging library and c3p0 calls it.

您的问题是您正在以TRACE/FINEST级别进行日志记录，这意味着您将获得许多不需要的调试信息，包括记录的堆栈跟踪.

your problem is that you are logging at TRACE/FINEST levels, which means you are getting a lot of debugging info, including logged stack traces, that you don't want.

您需要弄清楚如何配置用于以com.mchange开头的库的日志记录库，该库仅用于记录INFO或更高版本的消息.而已！配置您的日志记录，以便您停止记录调试级别的消息，这将消失.没有问题.您只是记录了太多信息.

you need to figure out how to configure whatever logging library you are using to log only messages at INFO or above for libraries beginning with com.mchange. that's it! configure your logging so that you stop logging debug-level messages, and this will go away. there is no problem. you are just logging too much information.

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