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From "gaurav9822@gmail.com"<gaurav9...@gmail.com>
Subject Re: Null pointer error when writing MapMessage key's value to database
Date Wed, 11 Oct 2017 05:20:09 GMT


On 2017-10-11 04:29, Gary Gregory <garydgregory@gmail.com> wrote: 
> On Tue, Oct 10, 2017 at 12:42 AM, gaurav9822@gmail.com <gaurav9822@gmail.com
> > wrote:
> 
> >
> >
> > On 2017-10-06 20:32, Gary Gregory <garydgregory@gmail.com> wrote:
> > > Hi,
> > >
> > > I think you will get better help if you provide a reproducible JUnit test
> > > case or program, on GitHub for example.
> > >
> > > Whenever you mention an Error or Exception, you should copy it in your
> > > message.
> >
> 
> Again?
> 
> Gary
> 
> 
> > >
> > > Gary
> > >
> > > On Fri, Oct 6, 2017 at 8:48 AM, gaurav9822@gmail.com <
> > gaurav9822@gmail.com>
> > > wrote:
> > >
> > > > Hi log4j2 users,
> > > >
> > > > I have created a MapMessage with a key-value pair
> > > >
> > > > e.g. userName="log4j"
> > > >
> > > > I have configured JDBCAppender with
> > > >
> > > > <Column name="userName" pattern="%K{userName}"/>
> > > >
> > > > But, it gives null pointer error when tried to insert into database
> > table
> > > > using %K/%map/%MAP
> > > > and works when you put normal message/literal string.
> > > >
> > > > Note:
> > > > 'userName' is same for Column-name, pattern and MapMessage-key as well.
> > > > Using log4j version 2.9.0
> > > >
> > > > Please help,
> > > >
> > > > Thanks,
> > > > Gaurav
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> > > > For additional commands, e-mail: log4j-user-help@logging.apache.org
> > > >
> > > >
> > > 1)    Test.java
> >
> > package com.test;
> >
> > import org.apache.logging.log4j.*;
> > import org.apache.logging.log4j.message.MapMessage;
> > import java.util.*;
> >
> > public class Test {
> >
> >   public static void main(String[] args) {
> >     dbLog();
> >   }
> >
> >   public static void dbLog() {
> >     Logger logger = LogManager.getLogger("dbLogger");
> >
> >     Map<String, String> myMap = new HashMap<>();
> >     myMap.put("username", "123456");
> >     logger.error(new MapMessage(myMap));
> >   }
> > }
> >
> > 2)      log4j2.xml
> >
> > <Configuration status="info" name="myConfig">
> >     <Appenders>
> >         <JDBC name="databaseAppender" tableName="temp">
> >             <ConnectionFactory class="com.database.ConnectionFactory"
> > method="getDatabaseConnection"/>
> >             <Column name="username" pattern="%K{username}"/>
> >         </JDBC>
> >     </Appenders>
> >     <Loggers>
> >         <Logger name="dbLogger" level="error" additivity="false">
> >             <AppenderRef ref="databaseAppender"/>
> >         </Logger>
> >
> >         <Root level="ERROR">
> >             <AppenderRef ref="Console1"/>
> >         </Root>
> >     </Loggers>
> > </Configuration>
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> > For additional commands, e-mail: log4j-user-help@logging.apache.org
> >
> >
> 

The pattern="%K{username}" is not working

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