log4j WARN No appenders could be found for logger-优快云博客

From: http://ylzhj01.javaeye.com/blog/763361

使用时，如果在程序中没有 log4j.properties , 则会出现如标题的warn，程序不能运行。

把这个文件放到src下便可

网络较详细地说明有：

http://blog.youkuaiyun.com/azheng270/archive/2008/03/12/2173430.aspx

http://blog.youkuaiyun.com/hingwu/archive/2007/02/13/1509269.aspx

http://www.cnblogs.com/licheng/archive/2008/09/23/1297185.html

http://haitao.javaeye.com/blog/192491

log4j WARN No such property SMTP Username

是因为版本不对， log4j-1.2.13.jar 用新的 log4j-1.2.16.jar解决问题

出现下面的问题

1。即使是将 log4j.appender.MAIL.Threshold=ERROR 修改为 INFO 级别，也只有在日志输出级别为 ERROR （即代码中调用logger.error("message")方法）时才会发送邮件，不知道是什么原因，反正现在的已经满足了需求，就没在去研究。

可能的解决办法http://www.manning-sandbox.com/thread.jspa?messageID=91270

Java代码

Inordertosendemailloggingmessages for levelsbelowerror,youneedtosetandcreatea new EvaluatorClass.Tofollowtheexampleabove,thelo4j.propertiesfilebecomes:
#Assignappenderstorootlogger
log4j.rootLogger=DEBUG,myConsole,myLogFile,myMail
#Consoleappender
log4j.appender.myConsole=org.apache.log4j.ConsoleAppender
log4j.appender.myConsole.layout=org.apache.log4j.PatternLayout
log4j.appender.myConsole.layout.ConversionPattern=%5p[%t](%F:%L)-%m%n
#Rollingfileappender
log4j.appender.myLogFile=org.apache.log4j.RollingFileAppender
log4j.appender.myLogFile.File=mylog.log
log4j.appender.myLogFile.MaxFileSize=100KB
log4j.appender.myLogFile.MaxBackupIndex=2
log4j.appender.myLogFile.layout=org.apache.log4j.PatternLayout
log4j.appender.myLogFile.layout.ConversionPattern=%d{MMMd,yyyyhh:mm:ssa}:%p[%t]%m%n
log4j.appender.myLogFile.threshold=WARN
#SMTPappender
log4j.appender.myMail=org.apache.log4j.net.SMTPAppender
log4j.appender.myMail.Threshold=WARN
log4j.appender.myMail.BufferSize=10
log4j.appender.myMail.To=username@agency .gov
log4j.appender.myMail.From=username@agency .gov
log4j.appender.myMail.SMTPHost=smtphost
log4j.appender.myMail.Subject=Log4JMessage
log4j.appender.myMail.layout=org.apache.log4j.PatternLayout
log4j.appender.myMail.layout.ConversionPattern=%5p[%t](%F:%L)-%m%n
#THISISTHENEWLINETOSETTHEEVALUATOR
log4j.appender.myMail.evaluatorClass=com.millersystems.example.spi.MyEvaluator
Nowyouhavetocreatetheevaluatorclass andimplementtheorg.apache.log4j.spi.TriggeringEventEvaluator interface andplace this class inapathwherelog4jcanaccessit.
//ExampleTriggeringEventEvaluatorimpl
package com.millersystems.example.spi;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.spi.TriggeringEventEvaluator;
public class MyEvaluator implements TriggeringEventEvaluator{
public boolean isTriggeringEvent(LoggingEventevent){ return true ;}
}

In order to send email logging messages for levels below error, you need to set and create a new EvaluatorClass. To follow the example above, the lo4j.properties file becomes:
# Assign appenders to root logger
log4j.rootLogger=DEBUG, myConsole, myLogFile, myMail

# Console appender
log4j.appender.myConsole=org.apache.log4j.ConsoleAppender
log4j.appender.myConsole.layout=org.apache.log4j.PatternLayout
log4j.appender.myConsole.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

# Rolling file appender
log4j.appender.myLogFile=org.apache.log4j.RollingFileAppender
log4j.appender.myLogFile.File=mylog.log
log4j.appender.myLogFile.MaxFileSize=100KB
log4j.appender.myLogFile.MaxBackupIndex=2
log4j.appender.myLogFile.layout=org.apache.log4j.PatternLayout
log4j.appender.myLogFile.layout.ConversionPattern=%d{MMM d, yyyy hh:mm:ss a}: %p [%t] %m%n
log4j.appender.myLogFile.threshold=WARN

# SMTP appender
log4j.appender.myMail=org.apache.log4j.net.SMTPAppender
log4j.appender.myMail.Threshold=WARN
log4j.appender.myMail.BufferSize=10
log4j.appender.myMail.To=username@agency.gov
log4j.appender.myMail.From=username@agency.gov
log4j.appender.myMail.SMTPHost=smtphost
log4j.appender.myMail.Subject=Log4J Message
log4j.appender.myMail.layout=org.apache.log4j.PatternLayout
log4j.appender.myMail.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
# THIS IS THE NEW LINE TO SET THE EVALUATOR
log4j.appender.myMail.evaluatorClass=com.millersystems.example.spi.MyEvaluator


Now you have to create the evaluator class and implement the org.apache.log4j.spi.TriggeringEventEvaluator interface and place this class in a path where log4j can access it.

//Example TriggeringEventEvaluator impl

package com.millersystems.example.spi;

import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.spi.TriggeringEventEvaluator;
public class MyEvaluator implements TriggeringEventEvaluator {

public boolean isTriggeringEvent(LoggingEvent event) { return true; }

}

2。log4j:ERROR Error occured while sending e-mail notification.
javax.mail.SendFailedException: Sending failed;
nested exception is:
class javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command first. d39sm646911wam.4

解决办法：

http://codelol.com/2009/09/log4j-smtpappender-and-authentication/

Java代码

Iwastryingtohookupmylog4jconfigurationtomygmailaccountsothatIcouldbeimmediatelyalert for errors.Prettysimpleuse case …ButIstartedgettingerrorslike:
com.sun.mail.smtp.SMTPSendFailedException:530 5.7 . 0 MustissueaSTARTTLScommandfirst.
and
com.sun.mail.smtp.SMTPSendFailedException:530 5.7 . 0 Authenticationrequired
IhavereasontobelieveSMTPAppenderisborkedonanythingauthenticationrelatedbecauseyourauthenticationpropertiesarereadafterthejavax.mail.Sessioniscreated.Thefollowingiscodefor anoverriddenSMTPAppenderthattakesoverthesessioncreation.
viewsourceprint?01 . import java.security.Security;
02 . import java.util.Properties;
03 . import javax.mail.PasswordAuthentication;
04 . import javax.mail.Session;
05 . import org.apache.log4j.net.SMTPAppender;
06 .
07 . public class SMTPSSLAppender extends SMTPAppender{
08 .
09 .
public SMTPSSLAppender(){
10 .
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
11 .
}
12 .
13 .
@Override
14 .
protected SessioncreateSession(){
15 .
Propertiesproperties=new Properties();
16 .
properties.setProperty("mail.transport.protocol" , "smtp" );
17 .
properties.setProperty("mail.host" ,getSMTPHost());
18 .
properties.put("mail.smtp.auth" , "true" );
19 .
properties.put("mail.smtp.port" , "465" );
20 .
properties.put("mail.smtp.socketFactory.port" , "465" );
21 .
properties.put("mail.smtp.socketFactory.class" , "javax.net.ssl.SSLSocketFactory" );
22 .
properties.put("mail.smtp.socketFactory.fallback" , "false" );
23 .
properties.setProperty("mail.smtp.quitwait" , "false" );
24 .
25 .
Sessionsession=Session.getDefaultInstance(properties,new javax.mail.Authenticator(){
26 .
protected PasswordAuthenticationgetPasswordAuthentication()
27 .
{return new PasswordAuthentication(getSMTPUsername(),getSMTPPassword());}
28 .
});
29 .
30 .
return session;
31 .
}
32 .}Andthelog4j.propertieswouldhavesomethinglike:
viewsourceprint?01 .log4j.appender.mail=SMTPSSLAppender
02 .log4j.appender.mail.SMTPHost=smtp.gmail.com
03 .log4j.appender.mail.SMTPUsername=myusername
04 .log4j.appender.mail.SMTPPassword=mypassword
05 .log4j.appender.mail.BufferSize= 1
06 .log4j.appender.mail.Subject=ZOMGsomeerroroccured!
07 .log4j.appender.mail.To=my @email .com
08 .log4j.appender.mail.threshold=error
09 .log4j.appender.mail.layout=org.apache.log4j.PatternLayout
10 .log4j.appender.mail.layout.ConversionPattern=%d{ABSOLUTE}%5p%c{ 1 }:%L-%m%nOfcourse,overridingsessioncreationbreaksalotofthings,butitstillhasthe 20 %offunctionalitythat 80 %offolkswilluse