tillrohrmann commented on issue #6763: [FLINK-10415] Fail response future if connection closes in RestClient URL: https://github.com/apache/flink/pull/6763#issuecomment-425106479 Thanks again for the review @zentol. I had to add the `IdleStateHandler` because it happened sometimes in `RestClientTest#testConnectionClosedHandling` that the channel would not be closed by Netty after we closed the server socket. So sometimes Netty detects such an event and then calls `channelInactive` and sometimes not. For the latter case, we need to monitor the connection for idleness.
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