Error messages when libaio not installed (DSE 6.0 and 6.7)

When the required libaio1 package is not installed.

DSE 6.7 and 6.0 require installing the libaio package. If the libaio package is not installed, an error like this is logged:
WARN  [main] 2018-04-10 03:09:20,412 - Epoll doesn't seem to be available: this may result in subpar performance. Libaio doesn't appear to be installed.
java.lang.IllegalArgumentException: Failed to load any of the given libraries: [netty-transport-native-epoll, netty_transport_native_epoll]
        at io.netty.util.internal.NativeLibraryLoader.loadFirstAvailable(
        at org.apache.cassandra.concurrent.TPC.<clinit>(
        at org.apache.cassandra.service.CassandraDaemon.initializeTPC(
        at org.apache.cassandra.service.CassandraDaemon.activate(
        at org.apache.cassandra.service.CassandraDaemon.main(
This part of the error message Libaio doesn't appear to be installed. indicates that libaio was not installed during installation. In earlier versions of DSE, the libaio package was not required.
To resolve this error:
  1. Install libaio1:
    • For Debian-based systems:
      sudo apt-get install libaio1
    • For Red Hat-based systems:
      sudo yum install libaio1
  2. Restart DSE.