Joshua Hyde created FLUME-2308:
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Summary: Document requirements for custom source
Key: FLUME-2308
URL: https://issues.apache.org/jira/browse/FLUME-2308
Project: Flume
Issue Type: Improvement
Components: Docs
Reporter: Joshua Hyde
Priority: Minor
I implemented my own custom source that extends
{{org.apache.flume.source.AbstractSource}}; to my surprise, however, I saw this
in my logs:
{noformat}
31 Jan 2014 15:40:11,289 ERROR [conf-file-poller-0]
(org.apache.flume.node.AbstractConfigurationProvider.loadSources:366) - Source
basset_source has been removed due to an error during configuration
java.lang.IllegalArgumentException: No known runner type for source
com.cerner.sentinel.flume.sources.basset.BassetSource{name:basset_source,state:IDLE}
at org.apache.flume.SourceRunner.forSource(SourceRunner.java:54)
at
org.apache.flume.node.AbstractConfigurationProvider.loadSources(AbstractConfigurationProvider.java:355)
at
org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:102)
at
org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:140)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
{noformat}
The solution, it appears, is mentioned in [this StackOverflow
question|http://stackoverflow.com/questions/13201893/flume-1-2-0-custom-source/13202095#13202095]:
{quote}i think i figured it out. The documentation on the Flume website does
not mention a custom implementation should implement not the Source interface
but either the EventDrivenSource or PollableSource interface.
{quote}
It would be helpful if this was, as mentioned, written in the user-facing
documentation. :)
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