When I try the map-side join example (under Hadoop 0.17.1, running in
standalone mode under Win32), it attempts to dereference a null pointer.
$ cat One/some.txt
A 1
B 1
C 1
E 1
$ cat Two/some.txt
A 2
B 2
C 2
D 2
$ bin/hadoop jar *examples.jar join
Thanks very much, Chris!
Cheers,
John
-Original Message-
From: Chris Douglas [mailto:[EMAIL PROTECTED]
Sent: Friday, August 08, 2008 1:57 PM
To: core-user@hadoop.apache.org
Subject: Re: "Join" example
The contrib/data_join framework is different from the map-side join
Message-
From: John DeTreville [mailto:[EMAIL PROTECTED]
Sent: Friday, August 08, 2008 2:34 AM
To: core-user@hadoop.apache.org
Subject: "Join" example
Hadoop ships with a few example programs. One of these is "join,"
which
I believe demonstrates map-side joins. I
There are some examples in $HADOOPHOME/src/contrib/data_join, which I hope
would help.
Wei
-Original Message-
From: John DeTreville [mailto:[EMAIL PROTECTED]
Sent: Friday, August 08, 2008 2:34 AM
To: core-user@hadoop.apache.org
Subject: "Join" example
Hadoop ships with a f
Hadoop ships with a few example programs. One of these is "join," which
I believe demonstrates map-side joins. I'm finding its usage
instructions a little impenetrable; could anyone send me instructions
that are more like "type this" then "type this" then "type this"?
Thanks in advance.
Cheers,
J
