Java Exception

[gnomus]

Over the last few weeks - since upgrading to v2.1 - I've noticed that MinimServer will stop running on my QNAP NAS. The system tray icon is red and it reports an 'Exception while processing action request: java.util.ConcurrentModificationException' message.

The NAS is a QNAP HS-210 running the latest firmware (4.3.3.1945).

In 'Show Log', I see the following:

MinimServer: exception while processing action request: java.util.ConcurrentModificationException
java.util.ConcurrentModificationException
at java.util.ArrayList.sort(ArrayList.java:1462)
at java.util.Collections.sort(Collections.java:175)
at com.minimserver.Server$ValueContainer.sortFilters(Server.java:27365)
at com.minimserver.Server$ValueContainer.doPopulate(Server.java:27357)
at com.minimserver.Server$ValueContainer.populate(Server.java:27289)
at com.minimserver.Server.populateContainer(Server.java:11536)
at com.minimserver.Server.getContainer(Server.java:11461)
at com.minimserver.Server.populateContainer(Server.java:11535)
at com.minimserver.Server.getContainer(Server.java:11461)
at com.minimserver.Server.populateContainer(Server.java:11535)
at com.minimserver.Server.access$40600(Server.java:181)
at com.minimserver.Server$ContentDirectoryProvider.doBrowse(Server.java:31384)
at com.minimserver.Server$ContentDirectoryProvider.browse(Server.java:31328)
at org.openhome.net.device.providers.DvProviderUpnpOrgContentDirectory1$DoBrowse.ac​tionInvoked(DvProviderUpnpOrgContentDirectory1.java:978)

Any ideas what might be happening? Minimserver used to run without issue, but I've had this a handful of times now in the last few weeks.

Steve