nifi-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Joe Witt <>
Subject Re: ExecuteProcess processor cannot be stopped/started
Date Mon, 23 Nov 2015 14:48:55 GMT
Good point on stopping just that process and didn't realize the
filename trick was an option - cool

On Mon, Nov 23, 2015 at 9:30 AM, Mark Payne <> wrote:
> Chris,
> Just to expand upon what Joe mentioned below.
> When you say that it immediately becomes stuck when you restart, I assume
> that means that you're restarting with it running. If you tell the processor to stop
> and restart, it should not begin running. This way you wouldn't need to change
> the autoResumeState. Unless I'm misunderstanding something?
> Also, when you run "bin/ dump" it is often easier to specify a filename there
> such as "bin/ dump thread-dump.txt" so that it writes the thread dump to the
> filename specified, rather than writing it to the logs.
> Thanks
> -Mark
>> On Nov 23, 2015, at 9:25 AM, Joe Witt <> wrote:
>> Chris,
>> If you run into a case of a stuck thread we'd love to see the stack
>> trace.  You can generate one by running 'bin/ dump' and sending
>> us the logs.  I believe it is bootstrap.log specifically.
>> If you have a processor which immediately gets stuck after startup
>> where it takes a thread and never relinquishes even if told to stop
>> then that does present a tricky situation for a user today.  We need
>> to provide a mechanism [1] whereby the user can say 'kill' and we'd
>> take that thread off into some special space and whatever sessions(s)
>> it has are automatically rolled-back no matter what.  Right now the
>> approach you'd have to take is to set conf/
>>   nifi.flowcontroller.autoResumeState=false
>> Then restart and now you can change/tweak/fix/test that processor
>> because all processes will come up stopped.  Just remember to change
>> that setting back :-)
>> Now, perhaps add additional copies of that processor to the graph and
>> tweak settings to find what is ultimately holding it up.  Tell it to
>> redirect the error stream, try the command manually, etc..
>> [1]
>> Thanks
>> Joe
>> On Mon, Nov 23, 2015 at 8:45 AM, Chris Teoh <> wrote:
>>> Hi folks,
>>> I have a processor stuck with a process (1 displayed in top right corner).
>>> How do I stop this? I have tried restarting NiFi but it comes back with the
>>> same issue.
>>> Kind Regards
>>> Chris

View raw message