Thanks Patrick,
We do have plans to upgrade to *java 11* eventually but we will go through internal testing and would also need some time given the size of our infrastructure. Is it safe to assume that the issue exists in the combination of upgrades from 3.11.x to 4.0.x *and* running on JAVA 8 ? Did you happen to have created a ticket for this when you observed the issue ? Thanks vaibhav On Wed, Aug 16, 2023 at 11:15 AM Patrick Lee <patrickclee0...@gmail.com> wrote: > I've actually noticed this as well on a few clusters I deal with but after > upgrading Cassandra from 3.11 to 4 we also changed to use Java 11 shortly > after the cluster upgrade. After I moved to Java 11 I have not experienced > a problem. > > On Wed, Aug 16, 2023 at 12:12 PM vaibhav khedkar <vkhedk...@gmail.com> > wrote: > >> Thank you Scott >> >> We are seeing it for all the tables (Filter, Data ..etc ) >> >> <path>/nb-1-big-Statistics.db.tmp (deleted) >> <path>/nb-3-big-Statistics.db.tmp (deleted) >> <path>/nb-2-big-Data.db (deleted) >> <path>/nb-2-big-Statistics.db.tmp (deleted) >> <path>/nb-2-big-Index.db (deleted) >> <path>/nb-2-big-Statistics.db.tmp (deleted) >> <path>/nb-2-big-CompressionInfo.db (deleted) >> <path>/nb-2-big-Filter.db (deleted) >> <path>/nb-2-big-Summary.db (deleted) >> <path>/nb-2-big-Digest.crc32 (deleted) >> >> Also I believe the property `disk_access_mode` is only present in the DSE >> version of cassandra and we use Open source. >> >> I will certainly open the ticket for this. >> >> Thanks >> vaibhav >> >> On Wed, Aug 16, 2023 at 9:34 AM C. Scott Andreas <sc...@paradoxica.net> >> wrote: >> >>> Vaibhav, thank you for reaching out and sharing this issue report. >>> >>> Could you run an `lsof` and share which SSTable files you see open >>> (e.g., all SSTable components or a subset of them); and also share the >>> value of the `disk_access_mode` property from your cassandra.yaml? >>> >>> Opening a Jira ticket for this for discussion / investigation is >>> probably a good next step. >>> >>> Thanks, >>> >>> – Scott >>> >>> On Aug 16, 2023, at 9:28 AM, vaibhav khedkar <vkhedk...@gmail.com> >>> wrote: >>> >>> >>> Hi everyone, >>> >>> We recently upgraded our fleet of ~2500 Cassandra instances from 3.11.9 >>> to 4.0.5. >>> >>> After the upgrade, we are seeing a unique issue where the compacted >>> SSTables's file descriptors are still present and are never cleared. This >>> is causing false disk alerts. We have to restart nodes very often in order >>> to reclaim the disk space. >>> >>> We use the Apache version of C* along with CentOS Linux 7.9.2009 and >>> Java 8. >>> >>> We are looking for help in resolving this issue. If you have any >>> suggestions, please let us know. >>> >>> Thank you, >>> vaibhav >>> >>> >>> >> >> -- >> Best Regards, >> Vaibhav Khedkar >> Google Inc. >> Mobile : (806)- 252 - 2912 >> >> Email: vkhedk...@gmail.com >> > -- Best Regards, Vaibhav Khedkar Google Inc. Mobile : (806)- 252 - 2912 Email: vkhedk...@gmail.com
