Hi,
I'm using Tomcat versiĆ³n 8.5.23 with http2 and from time to time I get some 
ClosedChannelException:

{"message":"Failed to register socket with selector from 
poller","timestamp":"2019-10-02T02:23:32+02:00","level":"ERROR","networkFunction":"UDR","serviceId":"eric-udr-nudrfe","exception":"java.nio.channels.ClosedChannelException:
 null at 
java.nio.channels.spi.AbstractSelectableChannel.register(AbstractSelectableChannel.java:197)
 at 
org.apache.tomcat.util.net.NioEndpoint$PollerEvent.run(NioEndpoint.java:567) at 
org.apache.tomcat.util.net.NioEndpoint$Poller.events(NioEndpoint.java:682) at 
org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:787) at 
java.lang.Thread.run(Thread.java:748) "}

I don't know if this might be a problem in the configuration in my 
EmbeddedServletContainerCustomizer ( I don't think this is the problem because 
normally it works as expected) or if there is  a nio library bug which is 
already fixed in a newer version or if maybe there's a way to handle this 
exception through the socket.
I would appreciate any help to fix or avoid this behavior.

BR,
Helena

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