+1 for exploring adding this feature. We had a feature to dynamically change log levels at runtime through the rest API in Apache Apex and it was very helpful with debugging things.
________________________________ From: Paul Rogers <prog...@mapr.com> Sent: Friday, August 25, 2017 11:01:29 AM To: dev@drill.apache.org Subject: Re: Dynamically change logging levels for loggers Hi Kunal, Don’t know about rereading the config file, but I have had luck in the unit test framework with adjusting log levels programmatically. (Tests turn on interesting log levels for the duration of a single tests.) We might be able to use that capability (provided by Logback) to make adjustments at run time. - Paul > On Aug 25, 2017, at 10:55 AM, Kunal Khatua <kkha...@mapr.com> wrote: > > I figured this is a rarely modified piece of code but most frequently used > across all components. Hoping that someone who might have worked on logging > can share some insight from their experience in general, if not within Drill. > > I was wondering if changes to Drill's logback.xml can be picked up > dynamically. > > i.e. without restarting the Drillbit, change the logging level of specific > classes within the Drillbit. > > I ask this because sometimes, a Drillbit needs to go through a warmup phase > where the JVM optimizes the functions frequently in use. Changing the logging > from something like an INFO to a DEBUG level would then allow me to correctly > capture specific log messages without having to lose all those optimizations > due to a restart (for the DEBUG to take effect). > > Is it something worth having ? > > ~ Kunal
