: there are not many OOM stack details printed in the solr log file, it's : just saying No enough memory, and it's killed by ****oom.sh(solr's script).
not many isn't the same as none ... can you tell us *ANYTHING* about what the logs look like? ... as i said: it's not just the details of the OOM that would be helpful: any details about what the solr logs say solr is doing while the memory is growing (before the OOM) would also be helpful. : My question(issue) is not it's OOM or not, the issue is why JVM memory : usage keeps growing up but never going down, it's not how java programs : work. the normal java process can use a lot of memory, but it will throw : away after using it instead of keep it in the memory with reference. you're absolutely right -- that's how a java program should be have, and that's what i'm seeing when I try to repoduce what you're describing with solr 8.7.0 by running a few nodes, creating a collection and waiting. In other words: i can't reproduce what you are seing based on the information you've provided -- so the only thing i can do is to ask you for more information: what you see in the logs, what your configs are, the exact steps you take to trigger this situation, etc... Please help us help you so we can figure out what is causing the behavior you are seeing and try to fix it.... : > 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/