问题
The exception sometimes comes on the start of application,more frequently during the performance of the application .Moreover,the application starts slowly.
回答1:
Most likely your client node disconnects for some reason. You can check this by subscribing to EVT_CLIENT_NODE_DISCONNECTED event on the client (see [1] for more info on how to do this).
If this happens frequently, then there are some serious issues. The first thing I would check is the memory. Make sure that you're not running out of it and that you do not experience long GC pauses.
[1] https://apacheignite.readme.io/docs/events
来源：https://stackoverflow.com/questions/37384072/apache-ignite-cache-errorcaused-by-java-lang-illegalstateexception-cache-has