日志消息未写入日志文件

Question

我已经用Log4j配置了一个项目。 我已经使用log4.properties文件配置了log4j。 测试运行时，它将创建myLog.log文件，但不会将任何内容写入日志文件。 我们使用的Appender为RollingFileAppender和log4j.rootLogger=DEBUG 。

任何人都可以建议导致此问题的原因吗？

这是项目的log4j.properties。

log4j.rootLogger= DEBUG, ConsoleAppender, Rolling 
log4j.appender.ConsoleAppender=org.apache.log4j.ConsoleAppender 
log4j.appender.ConsoleAppender.layout=org.apache.log4j.PatternLayout 

log4j.appender.ConsoleAppender.layout.ConversionPattern=%d %-2p %c.%M(): %m%n 
log4j.appender.Rolling=org.apache.log4j.RollingFileAppender 
log4j.appender.Rolling.MaxFileSize=5MB 
log4j.appender.Rolling.MaxBackupIndex=2 
log4j.appender.Rolling.File=D:\Logs\myProj.log 
log4j.appender.Rolling.layout = org.apache.log4j.PatternLayout 
log4j.appender.Rolling.layout.ConversionPattern=%d %-4p %c.%M(): %m%n 
## Following two lines have been removed now.
log4j.logger.com=WARN 
log4j.logger.org=WARN

收到日志文件中的日志：

2012-01-16 22:02:08,534 DEBUG org.apache.http.headers.receiveResponseHeader(): << content-type: application/json; charset=UTF-8
2012-01-16 22:02:08,534 DEBUG org.apache.http.headers.receiveResponseHeader(): << connection: close
2012-01-16 22:02:08,534 DEBUG org.apache.http.headers.receiveResponseHeader(): << content-length: 236
2012-01-16 22:02:08,550 DEBUG org.apache.http.headers.receiveResponseHeader(): << server: httpd.js
2012-01-16 22:02:08,550 DEBUG org.apache.http.headers.receiveResponseHeader(): << date: Tue, 17 Jan 2012 03:02:06 GMT
2012-01-16 22:02:08,566 DEBUG org.apache.http.wire.wire(): << "{"name":"clickElement","sessionId":"2fad55cf-670e-44f3-ab60-7d2f76f641e6","status":0,"value":"This action is final and cannot be undone?"}"
2012-01-16 22:02:08,566 DEBUG org.apache.http.impl.conn.DefaultClientConnection.shutdown(): Connection shut down
2012-01-16 22:02:08,566 DEBUG org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.releaseConnection(): Released connection is not reusable.
2012-01-16 22:02:08,566 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.freeEntry(): Releasing connection [HttpRoute[{}->http://127.0.0.1:7055]][null]
2012-01-16 22:02:08,566 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.notifyWaitingThread(): Notifying no-one, there are no waiting threads
2012-01-16 22:02:10,566 DEBUG org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.getConnection(): Get connection: HttpRoute[{}->http://127.0.0.1:7055], timeout = 120000
2012-01-16 22:02:10,566 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.getEntryBlocking(): [HttpRoute[{}->http://127.0.0.1:7055]] total kept alive: 0, total issued: 0, total allocated: 0 out of 2000
2012-01-16 22:02:10,566 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.getFreeEntry(): No free connections [HttpRoute[{}->http://127.0.0.1:7055]][null]
2012-01-16 22:02:10,566 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.getEntryBlocking(): Available capacity: 2000 out of 2000 [HttpRoute[{}->http://127.0.0.1:7055]][null]
2012-01-16 22:02:10,581 DEBUG org.apache.http.impl.conn.tsccm.ConnPoolByRoute.createEntry(): Creating new connection [HttpRoute[{}->http://127.0.0.1:7055]]
2012-01-16 22:02:10,597 DEBUG org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(): Connecting to 127.0.0.1:7055
2012-01-16 22:02:10,597 DEBUG org.apache.http.client.protocol.RequestAddCookies.process(): CookieSpec selected: best-match
2012-01-16 22:02:10,597 DEBUG org.apache.http.client.protocol.RequestAuthCache.process(): Auth cache not set in the context
2012-01-16 22:02:10,597 DEBUG org.apache.http.impl.client.DefaultHttpClient.tryExecute(): Attempt 1 to execute request
2012-01-16 22:02:10,597 DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader(): Sending request: GET /hub/session/2fad55cf-670e-44f3-ab60-7d2f76f641e6/alert_text HTTP/1.1
2012-01-16 22:02:10,597 DEBUG org.apache.http.wire.wire(): >> "GET /hub/session/2fad55cf-670e-44f3-ab60-7d2f76f641e6/alert_text HTTP/1.1[\r][\n]"
2012-01-16 22:02:10,597 DEBUG org.apache.http.wire.wire(): >> "Accept: application/json, image/png[\r][\n]"
2012-01-16 22:02:10,597 DEBUG org.apache.http.wire.wire(): >> "Host: 127.0.0.1:7055[\r][\n]"
2012-01-16 22:02:10,597 DEBUG org.apache.http.wire.wire(): >> "Connection: Keep-Alive[\r][\n]"
2012-01-16 22:02:10,597 DEBUG org.apache.http.wire.wire(): >> "[\r][\n]"
2012-01-16 22:02:10,597 DEBUG org.apache.http.headers.sendRequestHeader(): >> GET /hub/session/2fad55cf-670e-44f3-ab60-7d2f76f641e6/alert_text HTTP/1.1
2012-01-16 22:02:10,597 DEBUG org.apache.http.headers.sendRequestHeader(): >> Accept: application/json, image/png
2012-01-16 22:02:10,597 DEBUG org.apache.http.headers.sendRequestHeader(): >> Host: 127.0.0.1:7055
2012-01-16 22:02:10,597 DEBUG org.apache.http.headers.sendRequestHeader(): >> Connection: Keep-Alive
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "HTTP/1.1 200 OK[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "content-type: application/json; charset=UTF-8[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "connection: close[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "content-length: 236[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "server: httpd.js[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "date: Tue, 17 Jan 2012 03:02:10 GMT[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.wire.wire(): << "[\r][\n]"
2012-01-16 22:02:10,612 DEBUG org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(): Receiving response: HTTP/1.1 200 OK

Answer 1

首先，确保将log4j.properties加载到类路径中。 我认为如果是webapp，也可以在WEB-INF/classes目录中找到该文件。 但是因为您说正在创建文件，所以我认为这不是问题。

所以，尝试这个

log4j.rootLogger= DEBUG, Console, Rolling 
log4j.appender.Console=org.apache.log4j.ConsoleAppender 
log4j.appender.Console.layout=org.apache.log4j.PatternLayout 

log4j.appender.Console.layout.ConversionPattern=%d %-2p %c.%M(): %m%n 
log4j.appender.Rolling=org.apache.log4j.RollingFileAppender 
log4j.appender.Rolling.MaxFileSize=5MB 
log4j.appender.Rolling.MaxBackupIndex=2 
log4j.appender.Rolling.File=D:\Logs\myProj.log 
log4j.appender.Rolling.layout = org.apache.log4j.PatternLayout 
log4j.appender.Rolling.layout.ConversionPattern=%d %-4p %c.%M(): %m%n 

请注意，我删除了最后两行。

基本上，这些WARN com和org开头的所有软件包的日志级别设置为WARN 。 因此，除非您记录了任何WARN消息，否则您将在日志文件上看不到任何内容。

您可以通过类似的方法尝试关卡

log4j.logger.com.foo.bar=DEBUG
log4j.logger.com.foo.bar.MyClass=TRACE

上面的命令将在DEBUG打印所有com.foo.bar日志，而在TRACE级别中打印com.foo.bar.MyClass日志。

Answer 2

或更详细：不会启用来自日志级别为<WARN的com或org-packages的日志记录请求。 因此它不会转发到您的rootLogger。

引用：

如果p> = q，则启用（级别为q的）记录器中级别为p的日志请求（分配或继承，以适当者为准）。

和

给定记录器的每个启用的日志记录请求都将转发给该记录器中的所有附加程序以及层次结构中较高的附加程序。

请参阅： http : //logging.apache.org/log4j/1.2/manual.html