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我正在使用 Winston for Node 将日志行输出到 Loggly。我遇到了一个问题，我无法解决将日志行输出到控制台的位置，但它们从未出现在 Loggly 中。有趣的是，一些日志行出现在 Loggly 中，而另一些则没有。

这是控制台数据：

info: Lambda: createCustomer(dev): Function called to create customer in DynamoDB. Attempt #1

info: Lambda: createCustomer(dev): Successfully created customer (6196434835540541440) on attempt #1 Attempting to create a ZOHO customer record

error: Lambda: createCustomer(dev): Error creating ZOHO customer (Enter a valid Customer Name). Attempting to delete customer (6196434835540541440) from FS database

info: Lambda: createCustomer(dev): FS customer (6196434835540541440) was successfully backed out.

以下是 Loggly 中出现的内容：

2016-10-24 17:39:49.462 {"level":"info","message":"Lambda: createCustomer(dev): Function called to create customer in DynamoDB. Attempt #1"}

2016-10-24 17:39:49.792 {"level":"info","message":"Lambda: createCustomer(dev): Successfully created customer (6196434835540541440) on attempt #1 Attempting to create a ZOHO customer record"}

我不明白为什么对 watson.log 的调用会输出到控制台，但永远不会到达 Loggly。我的脚本是否有可能在 watson.log 完成之前“结束”所以它只是中止（这是一个 lambda 函数）？

简化代码：

exports.handler = (event, context, callback) => { 
    createCustomer(event, callback);
}

function createCustomer(event, callback) {   
    docClient.put(event.body, function(err, data) {
        if (err) {
            // code to try to create the customer 3 times then fail.
        }
        else {
            winston.log('info', 'This log line will output to both the console and Loggly.');

            updateCustId(event, data.customer_id, function(err, data) {
                if (err) 
                    winston.log('error','This will output to console but not appear in Loggly.');
                else 
                    winston.log('error','This will output to console but not appear in Loggly.');

                callback(null,  event.body.Item);
            });
        }
    });
}
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