Recently, I received many crashed errors like below:
java.lang.NullPointerException
at com.splunk.mint.network.MonitorRegistry.getMetricsForName(MonitorRegistry.java:31)
at com.splunk.mint.network.socket.MonitoringSocketImpl.close(MonitoringSocketImpl.java:199)
at java.net.Socket.close(Socket.java:317)
at java.net.ServerSocket.accept(ServerSocket.java:130)
....
The fix for the NullPointerException issue was released in 5.x SDK version.