I have been using distributed search with haproxy but noticed that I am suffering a little from tcp connections building up waiting for the OS level closing/time out:
netstat -a ... tcp6 1 0 10.0.16.170%34654:53789 10.0.16.181%363574:8893 CLOSE_WAIT tcp6 1 0 10.0.16.170%34654:43932 10.0.16.181%363574:8890 CLOSE_WAIT tcp6 1 0 10.0.16.170%34654:43190 10.0.16.181%363574:8895 CLOSE_WAIT tcp6 0 0 10.0.16.170%346547:8984 10.0.16.181%36357:53770 TIME_WAIT tcp6 1 0 10.0.16.170%34654:41782 10.0.16.181%363574:8888 CLOSE_WAIT tcp6 1 0 10.0.16.170%34654:52169 10.0.16.181%363574:8890 CLOSE_WAIT tcp6 1 0 10.0.16.170%34654:55947 10.0.16.181%363574:8887 CLOSE_WAIT tcp6 0 0 10.0.16.170%346547:8984 10.0.16.181%36357:54040 TIME_WAIT tcp6 1 0 10.0.16.170%34654:40030 10.0.16.160%363574:8984 CLOSE_WAIT ... Digging a little into the haproxy documentation, it seems that they do not support persistent connections. Does solr normally persist the connections between shards (would this problem happen even without haproxy)? Ian.
