SolrCloud shards marked as down and Does not recovery connection to zk

[KNitin <ni...@gmail.com>]

Hi,

I am  indexing about 5M docs in a 4 shard and 1 replica setup. During
indexing one of the shards is marked as down in zookeeper but when i tail
the logs all the updates are received in the shard and a hard commit at the
end of the job also succeeds.  (The auto commit is set to trigger every 10
mins or 150K documents).  The shard does not recover until i force restart
solr on that node.  The mem/cpu/load on solr is very less during this time.

How and when does solr try to reconnect to zk?

Thanks,
Nitin