Re: debug for Flink

Posted by Qian Ye on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/debug-for-Flink-tp19620p19646.html

Thanks for your kind reply.
But I still have some question. What does the logging level mean in your system? Why do you need to re-deploy the cluster to change the logging level?  As far as I know, the debugging information can be divided into level like info, warn, error, etc. Is these information totally logged during the system running? And then they can further be analyzed by category them by level?

Best,
Stephen

> On Apr 19, 2018, at 7:19 AM, Kien Truong <[hidden email]> wrote:
>
> Hi,
>
> Our most useful tool when debugging Flink is actually the simple log files, because debugger just slow things down too much for us.
>
> However, having to re-deploy the entire cluster to change the logging level is a pain (we use YARN),
>
> so we would really like an easier method to change the logging level at runtime.
>
>
> Regards,
>
> Kien
>
>
> On 4/19/2018 5:53 AM, Qian Ye wrote:
>> Hi
>>
>> I’m wondering if new debugging methods/tools  are urgent for Flink development. I know there already exists some debug methods for Flink, e.g., remote debugging of flink clusters(https://cwiki.apache.org/confluence/display/FLINK/Remote+Debugging+of+Flink+Clusters). But are they are convenient enough?
>>
>> Best regards.