Hi Koji,
Actually i have set all connections to FIFO and concurrency tasks to 1 for all
processors.
Before and after the MergeRecord, I add a LogAttribute to debug.
Before MergeRecord，the order in logfile is A,B,C in three flowfile
After MergeRecord, the order becomes {A,C,B} in one flowfile
This is nondeterministic.
I think I should look up the MergeRecord code and do further debug.
Thanks,
Lei
wangl...@geekplus.com.cn
From: Koji Kawamura
Date: 2019-10-16 09:46
To: users
CC: dev
Subject: Re: MergeRecord can not guarantee the ordering of the input sequence?
Hi Lei,
How about setting FIFO prioritizer at all the preceding connections
before the MergeRecord?
Without setting any prioritizer, FlowFile ordering is nondeterministic.
Thanks,
Koji
On Tue, Oct 15, 2019 at 8:56 PM wangl...@geekplus.com.cn
<wangl...@geekplus.com.cn> wrote:
>
>
> If FlowFile A, B, C enter the MergeRecord sequentially, the output should be
> one FlowFile {A, B, C}
> However, when testing with large data volume, sometimes the output order
> will be not the same as they enter. And this result is nondeterministic
>
> This really confuses me a lot.
> Anybody has any insight on this?
>
> Thanks，
> Lei
>
> ________________________________
> wangl...@geekplus.com.cn
