All user shown offline even if they are online

For the second time, I’m having an issue with Spark / Openfire showing all of my users as offline in the chat client. When I log into Openfire, it shows 7-8 users as being online. But when I log into Spark and bring up the Offline group, it shows them all as being offline. It also shows them as offline if I log into Openfire using Meebo on my phone.

This is the second time this has happened to me. The first time, I just ended up re-installing Openfire since it was a test project. But now we have many more people using this so I don’t want to just blow it away.

I’ve tried clearing the server cache; that didn’t seem to help.

Any other troubleshooting tips? I’m using Openfire 3.7.0 and Spark 2.5.8 (also tried 2.6.0 RC).

I found this thread and followed the suggestion to increase the cache size,as I had the same message in my server warnings:

After adding this property and restarting Openfire, all was well.