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From Ravi Prakash <ravihad...@gmail.com>
Subject Re: Fw:Re:How to add custom field to hadoop MR task log?
Date Sat, 05 Nov 2016 03:35:02 GMT
Hi Maria!

You have to be careful which log4j.properties file is on the classpath of
the task which was launched. Often times there are multiple
log4j.properties file, perhaps in the classpaths or in one of the jars on
the classpath. Are you sure the log4j.properties file you edited is the
only one loaded by the classloader?

Ravi

On Fri, Nov 4, 2016 at 5:06 AM, Maria <linanmengxiaoai@126.com> wrote:

> Sorry,(clerical errors) .
> I just modified “log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601}
> %p %c: %m%n”
> to "log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %p %c: [ID:
> %X{ID}] %m%n",
> and use "MDC.put("ID",ID)" in mapper class, It does not work.
>
>
> At 2016-11-04 17:01:16, "Maria" <linanmengxiaoai@126.com> wrote:
> >
> >I know that, A simple way is to write "<custom ID> " to every LOG.info()/LOG.warn()....like
this:
> >
> >logger.info(ID + " start map logic");
> >BUT,every LOG info has to add "ID" is not wise.
> >Or else, can someone know how to modify the mapreduce task ConversionPattern configuration?
> >I tried to modify "RFA" Appender to this:
> >-------------------
> >log4j.appender.RFA=org.apache.log4j.RollingFileAppender
> >log4j.appender.RFA.File=${hadoop.log.dir}/${hadoop.log.file}
> >log4j.appender.RFA.MaxFileSize=${hadoop.log.maxfilesize}
> >log4j.appender.RFA.MaxBackupIndex=${hadoop.log.maxbackupindex}
> >log4j.appender.RFA.layout=org.apache.log4j.PatternLayout
> ># Pattern format: Date LogLevel LoggerName LogMessage
> >log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
> ># Debugging Pattern format
> >#log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %-5p %l - [ID: %X{ID}] 
%m%n
> >-----------------
> >It does not work.
> >
> >At 2016-11-04 11:26:57, "Maria" <linanmengxiaoai@126.com> wrote:
> >>
> >>Hi, dear developers,
> >>
> >>I'm trying to reconfig $HADOOP/etc.hadoop/log4j.properties,
> >>I want to add an <custom ID> to mapreduce log before LOGmessage. Like this:
> >>"ID:234521 start map logic"
> >>
> >>My steps as follow:
> >>(1)In my Mapper Class:
> >>
> >>static Logger logger = LoggerFactory.getLogger(Mapper.class);
> >>....
> >>
> >>public void map(Object key, Text value, Context context) throws IOException,
InterruptedException {
> >>
> >>    MDC.put("ID", "operatorID");
> >>    logger.info("start map logic");
> >>
> >>     StringTokenizer itr = new StringTokenizer(value.toString());
> >>     while (itr.hasMoreTokens()) {
> >>       word.set(itr.nextToken());
> >>       context.write(word, one);
> >>     }
> >>   }
> >> }
> >>(2)config $HADOOP/etc.hadoop/log4j.properties
> >>
> >>log4j.appender.TLA=org.apache.hadoop.mapred.TaskLogAppender
> >>log4j.appender.TLA.taskId=${hadoop.tasklog.taskid}
> >>log4j.appender.TLA.isCleanup=${hadoop.tasklog.iscleanup}
> >>log4j.appender.TLA.totalLogFileSize=${hadoop.tasklog.totalLogFileSize}
> >>
> >>log4j.appender.TLA.layout=org.apache.log4j.PatternLayout
> >>log4j.appender.TLA.layout.ConversionPattern=%l  %p %c: ID:[%X{ID}]  %m%n
> >>
> >>
> >>BUT it does not work. and because use slf4j API, so I don't know how to get Appenders.
> >>
> >>I am desperately in need。。
> >>Any help would be highly appreciated
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> >
> >
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> >
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