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Flume, mail # user - Could not instantiate class org.apache.flume.clients.log4jappender


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Re: Could not instantiate class org.apache.flume.clients.log4jappender
Alexander Alten-Lorenz 2013-01-14, 08:13
Can you please post the running flume process (ps waux|grep flume)?

- Alex

On Jan 14, 2013, at 8:11 AM, Dongliang Sun <[EMAIL PROTECTED]> wrote:

> Alex,
>
> The flume startup no problem,
> flume-ng agent --conf ./conf/ --conf-file ./conf/flume.conf --name agent1
> -Dflume.root.logger=DEBUG,console
>
> I have test the following client,
> bin/flume-ng avro-client -H localhost -p 41414 -F ~/test.txt
>
> It's OK, but if I can not make it work if I use the log4jappender as the
> client.
>
> Thanks,
> Dongliang
>
>
> 2013/1/14 Alexander Alten-Lorenz <[EMAIL PROTECTED]>
>
>> Please post the flume startup line. I guess you have missed the --conf
>> switch.
>>
>> - Alex
>>
>> On Jan 14, 2013, at 4:25 AM, 孙东亮 <[EMAIL PROTECTED]> wrote:
>>
>>> I'm a newbie for the Flume, and I just set up flume for a test.
>>> I want to use the log4jappender to get log info from PIG scripts, the
>>> log4j.properties is:
>>>
>>> log4j.appender.flume >> org.apache.flume.clients.log4jappender.Log4jAppender
>>> log4j.appender.flume.Hostname = localhost
>>> log4j.appender.flume.Port = 41414
>>> log4j.logger.org.apache.pig=DEBUG,flume
>>>
>>> And for the flume.config:
>>>
>>> a1.sources = r1
>>> a1.sinks = k1
>>> a1.channels = c1
>>>
>>> # Describe/configure the source
>>> a1.sources.r1.type = avro
>>> a1.sources.r1.bind = localhost
>>> a1.sources.r1.port = 41414
>>>
>>> # Describe the sink
>>> a1.sinks.k1.type = logger
>>> # Use a channel which buffers events in memory
>>> a1.channels.c1.type = memory
>>> a1.channels.c1.capacity = 1000
>>> a1.channels.c1.transactionCapacity = 100
>>>
>>> # Bind the source and sink to the channel
>>> a1.sources.r1.channels = c1
>>> a1.sinks.k1.channel = c1
>>>
>>> But I got the following error when run a pig script:
>>> java.lang.ClassNotFoundException:
>>> org.apache.flume.clients.log4jappender.Log4jAppender
>>> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>>> at java.security.AccessController.doPrivileged(Native Method)
>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>>> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>>> at java.lang.Class.forName0(Native Method)
>>> at java.lang.Class.forName(Class.java:169)
>>> at org.apache.log4j.helpers.Loader.loadClass(Loader.java:179)
>>> at
>>>
>> org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:320)
>>> at
>>>
>> org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:121)
>>> at
>>>
>> org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:664)
>>> at
>>>
>> org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:647)
>>> at
>>>
>> org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:568)
>>> at
>>>
>> org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:442)
>>> at
>>>
>> org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:367)
>>> at org.apache.pig.Main.configureLog4J(Main.java:678)
>>> at org.apache.pig.Main.run(Main.java:337)
>>> at org.apache.pig.Main.main(Main.java:111)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>>
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
>>> log4j:ERROR Could not instantiate appender named "flume".
>>>
>>> Could you please help me find what I miss or where is incorrect for the
>>> configuration.
>>>
>>> Thanks a lot!
>>> Dongliang
>>
>> --
>> Alexander Alten-Lorenz
>> http://mapredit.blogspot.com
>> German Hadoop LinkedIn Group: http://goo.gl/N8pCF
>>
>>

--
Alexander Alten-Lorenz
http://mapredit.blogspot.com
German Hadoop LinkedIn Group: http://goo.gl/N8pCF