User roster gets cleared

[saarangsoltani]

We have a problem where user's contacts list (roster) is cleared from time to time. Could somebody give me some hints as to what I should be looking at to find out the cause?

Details (please complete the following information):

• Tigase version:7.0.0.0
• JVM flavour and version: openjdk version "1.8.0_275"
• Operating system/distribution/version centos

[woj-tek]

Is there any pattern to this? How often does it happen?

You should take a look at Debugging Tigase section in our documentation. Two possible cases would be:

1. someone intentionally deleted the rosters via XMPP over it's connection - check logs from xmpp.impl package
2. the rosters "disappear" in which case you should take a look at logs for db package.

Btw. version 7.0.0 is quite old and I'd recommend upgrading to the latest stable: 8.1.0