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io.netty.resolver.dns.DnsNameResolver#doResolveCached race condition

See original GitHub issue

Expected behavior

No exception.

Actual behavior

2018-01-15 05:33:32,915 ERROR [Redisson-Epoll-1-15] (org.redisson.connection.DNSMonitor) Unable to resolve xxx.0001.use1.cache.amazonaws.com
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at java.util.ArrayList.rangeCheck(ArrayList.java:653) ~[?:1.8.0_144]
    at java.util.ArrayList.get(ArrayList.java:429) ~[?:1.8.0_144]
    at io.netty.resolver.dns.DnsNameResolver.doResolveCached(DnsNameResolver.java:613) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.dns.DnsNameResolver.doResolve(DnsNameResolver.java:593) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.dns.DnsNameResolver.doResolve(DnsNameResolver.java:527) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.SimpleNameResolver.resolve(SimpleNameResolver.java:63) ~[netty-resolver-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.dns.InflightNameResolver.resolve(InflightNameResolver.java:100) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.dns.InflightNameResolver.resolve(InflightNameResolver.java:66) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.dns.InflightNameResolver.resolve(InflightNameResolver.java:51) ~[netty-resolver-dns-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.InetSocketAddressResolver.doResolve(InetSocketAddressResolver.java:57) ~[netty-resolver-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.InetSocketAddressResolver.doResolve(InetSocketAddressResolver.java:32) ~[netty-resolver-4.1.19.Final.jar:4.1.19.Final]
    at io.netty.resolver.AbstractAddressResolver.resolve(AbstractAddressResolver.java:108) ~[netty-resolver-4.1.19.Final.jar:4.1.19.Final]
    at org.redisson.connection.DNSMonitor$1.run(DNSMonitor.java:89) ~[redisson-3.5.7.jar:?]
    at io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]