Re: Problem with scheduler (stops after ten executions)

[Prasad Wagle <pr...@gmail.com>]

Hi Florian,

We have seen this behavior when the 10 quartz scheduler worker threads are
waiting for some note paragraph to complete at this statement
<https://github.com/apache/zeppelin/blob/v0.6.2/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Notebook.java#L645>.
You can see what the quartz scheduler worker threads are doing in the
jstack output of the ZeppelinServer process (look for
DefaultQuartzScheduler_Worker). Can you post that part of the jstack
output?

In some cases where the paragraphs generate JDBC queries, I have managed to
unblock threads by killing the queries in the database.

Regards,
Prasad



On Wed, Nov 9, 2016 at 1:41 AM, Florian Schulz <Fl...@web.de> wrote:

> Hi,
>
> I have a problem with the scheduler. I have a notebook and I execute the
> spark code in it every minute (with the cron scheduler). The scheduler
> starts ten times and then it stops and do nothing anymore (in no notebook
> at all). I use version 0.6.2 of Apache Zeppelin. Do you have any idea, why
> this happens? I can reproduce this without a problem, but I can't find
> anything in the logs. Hope you can help me.
>
>
> Best regards
> Florian
>