A follow up on my own post as it might be helpful for others, I found out that a firewall in the middle was dropping open connections with x amount of time of inactivity. ES wasn't really happy with this apparently.
Solution: set network.tcp.keep_alive true Add following params to sysctl.conf: net.ipv4.tcp_keepalive_time = 60 net.ipv4.tcp_keepalive_probes = 6 net.ipv4.tcp_keepalive_intvl = 10 -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/fbd78b0a-8aba-4aba-81b9-34555340c685%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
