-Re: Hook for Mapper kill
Vinod Kumar Vavilapalli 2013-10-18, 17:39
There isn't anything in the API as such. You could register your own JVM shut-down hook which does it.
OTOH, if you are running this on Linux and a setsid binary is available, Hadoop itself will take care of killing these additional processes - it kills the whole session in this case.
On Oct 14, 2013, at 1:07 PM, Hider, Sandy wrote:
> I know the task tracker frequently kill mappers. During the mapper setup we are kicking off a runtime executable and passing data to and from it within the mapper using unix named pipes.
> This works OK until a mappers are killed. Currently when this happens the standalone executable is left as a zombie process taking up resources.
> Is there any way for my mapper to be notified of the kill and allow it to shutdown the executable before being killed off? A shutdown hook of some kind?
> Thanks in advance,
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