: Is the matter to use the config file ? I am using custom config instead : of _default, my config is from solr 8.6.2 with custom solrconfig.xml
Well, it depends on what's *IN* the custom config ... maybe you are using some built in functionality that has a bug but didn't get triggered by my simple test case -- or maybe you have custom components that have memory leaks. The point of the question was to try and understand where/how you are running into an OOM i can't reproduce. Knowing exactly what your config looks like would help, knowing exactly what you do before you see the OOM would help (are you realy just creating the collections, or is it actauly neccessary to index some docs into those collections before you see this problem start to happen? what do the logs say during the time when the heap usage is just growing w/o explanation? what is the stack trace of the OOM? what does a heap abalysis show in terms of large/leaked objects? etc. You have to help us understand the minimally viable steps we need to execute to see the behavior you see.... https://cwiki.apache.org/confluence/display/SOLR/UsingMailingLists -Hoss http://www.lucidworks.com/
