Generation of .mdmp files

Niharika

Hi
I figured that on virtual machine my rapidminer server had been hosted there were some .mdmp files(each around 12GB) getting created in the folder where server has been installed.I per my knowledge these files get created if any process crashes.So can you help me to figure out how it is related in context of RapidMiner because these consume a lot of space on disk probably making the server slow as well.

sgenzer

cc @mmichel

mmichel

Hi Niharika,

the JVM is responsible for creating these dump files. You can deactivate it by setting this java option:

-XX:-CreateMinidumpOnCrash

If you don't want to pass this parameter via the start command, you can also add it to the default options by adding it to the $server/bin/standalone.conf(.bat) file.

Cheers,
Marcel

Niharika

Okay just to double check deactivating these won't be an issue as we can keep the track of processes on server from logs.Further by process crashing we mean the process was not able to run successfully on server and some error occurred which might be due to various issues like extension not there on server,some exception occurring while running the process.  

mmichel

Further by process crashing we mean the process was not able to run successfully on server

That sound quite strange. Which RapidMiner Server and Java VM are you using? We could not reproduce the mentioned behavior on our test system. Are you using any specific operators which may produce this dump files?

Niharika

Even I am not absolutely sure of the operators but probably we were testing some processes which uses python operator and that process was failing due to extension issue.
We are using server 9.2 and jre 1.8 

mmichel

Hi Niharika,

are you sure that these files were created because of process failures and not by a crash of the JVM?
So far, we've not observed the dump creation for process errors. I would appreciate it if you could provide a minimal example for the mdmp creation issue.

Thanks,
Marcel