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I'm running a Logstash service (Logstash OSS with OpenSearch Output Plugin, Version 7.16.3) locally on my PC. My OS is Ubuntu 18.04, and all the packages are up to date.

However, after a period of time, it creates a lot of directories with jruby- prefix in my /tmp directory and fills the free space on my hard disk. Does anybody have an idea about the cause of the problem?

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It seems it's a known bug in Logstash according to here and there.

Best Solution

According to the information on the second page, it was resolved after Logstash version 8.1.0. So, the best solution might be to upgrade Logstash to a version greater than 8.1.0.

Hot Fix

If upgrading the package is impossible, there's a temporary solution on the first page. Create an executable shell file /path/to/clean.sh containing the following command:

find . -type d -name 'jruby*' -mtime +1 -prune -exec rm -rf {} \;

Then, run it periodically using the crontab utility. Open crontab file:

sudo crontab -e

and add the following line to it:

0 */12 * * * /path/to/clean.sh
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