A sink runner and the sink are build from the configuration and started by the lifecycle manager. The runner then regularly calls process on the sink.

Sinks and sources are not required to be multithreaded, as they are normally exclusively accessed by their runners. The exception to this is the lifecycle manager which may call start/stop pretty much whenever.

On 08/03/2012 04:24 AM, Mohit Anchlia wrote:
Trying to understand how flume sink invocation works. I see HBaseSink.java has start and stop, is this object created once or is this object created for every event call to sink?
Also, who calls start,process and stop?

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