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RE: Null pointer trying to use multiplexing
Not sure if this is the issue, but I believe this configuration property is wrong:

ais_agent.sources.ais-source1.selector.mapping.default = ais-ch1

It should be:

ais_agent.sources.ais-source1.selector.default = ais-ch1

Hope that helps,
Paul Chavez

-----Original Message-----
From: Steve Knott [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 08, 2013 3:33 PM
To: [EMAIL PROTECTED]
Subject: Null pointer trying to use multiplexing

Hi,

I am trying to use multiplexing. Basically, I have 1 source which sets a header field 'datatype' to either 'Position' or 'Ship'. Depending on the value, it should go to 1 of 2 channels, so the data will flow to two different files/sinks. I believe I have configured it correctly, but I keep getting a null pointer trying to start flume:

> java.lang.NullPointerException
>         at
> org.apache.flume.channel.MultiplexingChannelSelector.getChannelListFromNames(MultiplexingChannelSelector.java:160)
>         at
> org.apache.flume.channel.MultiplexingChannelSelector.configure(MultiplexingChannelSelector.java:94)
>         at
> org.apache.flume.conf.Configurables.configure(Configurables.java:41)

Has anyone seen this error?  My setup file is below for reference.

Thanks for any help,
Steve

----

# tell ais_agent which ones we want to activate.
ais_agent.channels = ais-ch1 ais-ch2
ais_agent.sources = ais-source1
ais_agent.sinks = ais-sink1 ais-sink2

# Define a memory channel called ch1 on ais_agent ais_agent.channels.ais-ch1.type = memory ais_agent.channels.ais-ch1.capacity = 100000 ais_agent.channels.ais-ch1.transactionCapactiy = 1000

ais_agent.channels.ais-ch2.type = memory ais_agent.channels.ais-ch2.capacity = 100000 ais_agent.channels.ais-ch2.transactionCapactiy = 1000

# Define an AIS source called ais-source1 on ais_agent and tell it # to connect to dog:8657. Connect it to channel ais-ch1.
ais_agent.sources.ais-source1.channels = ais-ch1 ais-ch2 ais_agent.sources.ais-source1.type = ais_flume.AISPortSource ais_agent.sources.ais-source1.host = dog ais_agent.sources.ais-source1.port = 8657 ais_agent.sources.ais-source1.selector.type = multiplexing ais_agent.sources.ais-source1.selector.header = datatype ais_agent.sources.ais-source1.selector.mapping.Position = ais-ch1 ais_agent.sources.ais-source1.selector.mapping.Ship = ais-ch2 ais_agent.sources.ais-source1.selector.mapping.default = ais-ch1
# Describe the sink
ais_agent.sinks.ais-sink1.channel = ais-ch1 ais_agent.sinks.ais-sink1.type = hdfs ais_agent.sinks.ais-sink1.hdfs.path = /csv6/ ais_agent.sinks.ais-sink1.serializer = TEXT ais_agent.sinks.ais-sink1.hdfs.filePrefix = position-%Y-%m-%d ais_agent.sinks.ais-sink1.hdfs.fileType = DataStream ais_agent.sinks.ais-sink1.hdfs.rollCount = 10000000 ais_agent.sinks.ais-sink1.hdfs.rollSize = 0 ais_agent.sinks.ais-sink1.hdfs.rollInterval = 0 ais_agent.sinks.ais-sink1.hdfs.batchSize = 100 ais_agent.sinks.ais-sink1.hdfs.maxOpenFiles = 5 ais_agent.sinks.ais-sink1.hdfs.writeFormat = Text
ais_agent.sinks.ais-sink2.channel = ais-ch2 ais_agent.sinks.ais-sink2.type = hdfs ais_agent.sinks.ais-sink2.hdfs.path = /csv/csv5/ ais_agent.sinks.ais-sink2.serializer = TEXT ais_agent.sinks.ais-sink2.hdfs.filePrefix = ship-%Y-%m-%d ais_agent.sinks.ais-sink2.hdfs.fileType = DataStream ais_agent.sinks.ais-sink2.hdfs.rollCount = 10000000 ais_agent.sinks.ais-sink2.hdfs.rollSize = 0 ais_agent.sinks.ais-sink2.hdfs.rollInterval = 0 ais_agent.sinks.ais-sink2.hdfs.batchSize = 100 ais_agent.sinks.ais-sink2.hdfs.maxOpenFiles = 5 ais_agent.sinks.ais-sink2.hdfs.writeFormat = Text ais_agent.sinks.ais-sink2.hdfs.maxOpenFiles = 5 ais_agent.sinks.ais-sink2.hdfs.writeFormat = Text