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I create a default project using GoogleAppEngine for java, and when I deploy my application on google server I have the following warning message for the first request.
log4j:WARN No appenders could be found for logger (DataNucleus.Connection).
log4j:WARN Please initialize the log4j system properly.
The log is working fine, but some request are delayed by this problem.
How can I configure it correctly?
What makes you sure that this is delaying some of your requests?
GAE does not function like a standard servlet container. Behind the scenes it unloads any webapps that are idle, and then loads them in again only when it gets a new request for that webapp. This is basically equivalent to doing a complete redeploy of your application, and it doesn’t even begin until after GAE has received the request. Thus any request that triggers a load operation will be noticeably delayed compared to subsequent requests.
But there are a whole lot of things going on that are contributing to the delay, and I think an uninitialized log4j setup is not making much of an actual difference.