Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Chukwa >> mail # user >> Chukwa collector confronted with a NPE

Copy link to this message
Re: Chukwa collector confronted with a NPE

Is there some process that's connecting to the SocketTeeWriter port
[9094 by default] and then not sending a command? I think you'll get
that NPE if you open the connection and then close it without sending

As you suspect, it should be benign, since all that's being killed
there is the per-connection handler thread.


On Wed, Nov 16, 2011 at 12:49 AM, IvyTang <[EMAIL PROTECTED]> wrote:
> Exception in thread "Thread-332" java.lang.NullPointerException
>         at
> org.apache.hadoop.chukwa.datacollection.writer.SocketTeeWriter$Tee.setup(SocketTeeWriter.java:178)
>         at
> org.apache.hadoop.chukwa.datacollection.writer.SocketTeeWriter$Tee.run(SocketTeeWriter.java:136)
>         at java.lang.Thread.run(Thread.java:662)
> 2011-11-16 02:44:07,147 INFO Thread-6 SocketTeeWriter - got connection from
> /
> And the is our hadoop cluster.
> This exception arises very frequently , every 5 mins.
> But the collector seemed doesn't been influenced .
> Why this exception arises? Is there something wrong with the hadoop?
> --
> Best regards,
> Ivy Tang

UC Berkeley Computer Science Department