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From David Novogrodsky <david.novogrod...@gmail.com>
Subject Question about Flume and Ambari
Date Thu, 05 Feb 2015 23:50:06 GMT
I have the misfortune to be learning Ambari, Hadoop, flume and Sqoop
at the same time.  I am running into a problem with a simple agent
configuration for Flume:

I have a very simple agent I am running from the command line using
this command:
[root@namenode lib]# flume-ng agent –conf conf –conf-file
/etc/flume/conf/a1/flume.conf -n a1

Here is the configuration file that is being managed by Ambari:
a1.sources = r1
a1.sinks = k1
a1.channels = c1

a1.sources.r1.type = seq

a1.sinks.k1.type = file_roll
a1.sinks.k1.channel = c1
a1.sinks.k1.sink.directory = /tmp/flume

a1.channels.c1.type = memory

a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

Ok, but I am getting this error:
15/02/05 17:25:52 ERROR flume.SinkRunner: Unable to deliver event.
Exception follows.
org.apache.flume.EventDeliveryException: Failed to open file
/tmp/flume/1423178752254-1 while delivering event
at org.apache.flume.sink.RollingFileSink.process(RollingFileSink.java:177)
at org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: /tmp/flume/1423178752254-1
(No such file or directory)

But here are the permissions for that directory:
[root@namenode a1]# hadoop fs -ls /tmp/
Found 7 items
drwxrwxrwx – root hdfs 0 2015-02-04 15:53 /tmp/flume
drwxr-xr-x – admin hdfs 0 2015-01-09 18:12 /tmp/hive-beeswax-admin
drwxr-xr-x – hue hdfs 0 2014-12-19 11:49 /tmp/hive-beeswax-hue

I changed ownership of the directory
[root@namenode a1]# sudo hadoop fs -ls /tmp/flume
[root@namenode a1]# sudo hadoop fs -ls /tmp/
Found 7 items
drwxrwxrwx – root root 0 2015-02-04 15:53 /tmp/flume
drwxr-xr-x – admin hdfs 0 2015-01-09 18:12 /tmp/hive-beeswax-admin

But I got the same results.

David Novogrodsky

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