Hi, I'm not Mark but still try to provide my help
> Hi Mark, > > Thanks for the response. For mainly related to our Thingworx IOT-based > application, we are using the Tomcat 9.0.62 server. So for that, we are > getting zombie or defunct processes. > > "Please provide the steps you used to recreate this issue in a clean > installation of a standalone Tomcat instance." -> So for this, We have > executed our installer, which itself installs the Tomcat server. So, there > are no manual steps that we ask the user to execute. What you were asked is to provide full details about your installer. That's most likely where we could see why you have this issue. > > As per the previous response, "A default Tomcat install does not create > parent and child processes, so zombie processes cannot occur." -> So we > have raised a support case with Tomcat to just understand the reason why > defunct processes are created. I'm not sure you can "raise a support case with Tomcat" as you do with commercial companies where you pay for support contracts. At least I was not aware Apache Tomcat provides such contracts, but I may have missed it. > > Is anybody already raised case similar to defunct or related to zombie > processes. If yes, can you please share which resolution you have provided > to them to prevent creation of those. Your best bet may be to openly provide more detailed info so we, as a community, can help you identifying why you see zombie processes. Regards, Simon > > Thanks, > Omkar V. > > -----Original Message----- > From: Mark Thomas <ma...@apache.org> > Sent: Friday, January 5, 2024 6:00 PM > To: users@tomcat.apache.org > Subject: Re: Regarding Tomcat is creating the zombie processes > > [You don't often get email from ma...@apache.org. Learn why this is > important at https://aka.ms/LearnAboutSenderIdentification ] > > You will need to provide more details. > > A default Tomcat install does not create parent and child processes so > zombie processes cannot occur. > > I'll also note that zombie process do not consume system resources (apart > from a process ID). > > Please provide the steps you used to recreate this issue in a clean > installation of a standalone Tomcat instance. > > Mark > > > On 05/01/2024 09:48, Vaidya, Omkar wrote: >> Adding information - >> Tomcat Version - 9.0.62 >> Platform - Linux Platform >> >> >> From: Vaidya, Omkar <ovai...@ptc.com> >> Sent: Friday, January 5, 2024 3:15 PM >> To: users@tomcat.apache.org >> Cc: Shriwardhankar, Varun <vshriwardhan...@ptc.com> >> Subject: Regarding Tomcat is creating the zombie processes >> >> Hi Team, >> >> This is regarding like we have one customer issue where on Linux >> platform, we have configured our IOT-application (Thingworx), which is >> using Tomcat as a server. >> So we are able to identify that even when we remove our application, >> Tomcat is creating a zombie (defunct) process, which is creating 200+ >> processes under the process table, which ultimately occupy all the OS >> resources and the application goes in a hung state. This issue is also >> reproducible on the Standalone Tomcat server also. >> There are two scenarios mentioned below - >> 1. If this is relatable to Tomcat can you please suggest any >> article or documentation so that we can stop zombie process creation, if >> this is a known issue or there is only way to clear zombie (defunct) >> process from Processes table of linux. >> 2. Also, let us know if this is a Operating System specific >> issue like as it is reproducible only on Linux, So Linux os is the thing >> that creates the zombie (defunct) processes? >> we are eagerly waiting for the response. >> >> Thanks, >> Omkar Vaidya. >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
