Du -sh /tmp : 773M /tmp

there are a lot of directories like this:

5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-6759995874843235691.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-6845318868178450786.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-6856210687239397600.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-6994588018087667865.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-7037861226139156752.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-7225913469382862775.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-815774054268364737.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-8656498973103699199.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-8809515691283408277.dir
5.3M    jetty-0.0.0.0-58080-bridge.war-_default-any-971732138657535052.dir

1- Is it safe to just delete those?

2- has anyone else had those ? they could be because of not doing an upgrade correct on my part…

3- on a freepbx system, is it ok to delete all files in /tmp when system reboots? I assume so but you know how that works.

more info on our set up :
cat /etc/schmooze/pbx-version
10.13.66-11

High Availability set up.

I have the same thing. Did you ever find out anything regarding these files?

Jetty is java and 58080 is the port associated with iSymphony. Probably crash files. You can delete them.