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SOLR-13159: Add a warning about DNS resolution in SolrCloud clusters.

This commit is contained in:
Andrzej Bialecki 2019-09-16 18:48:29 +02:00
parent e04917dc9f
commit 30aad175e0
1 changed files with 6 additions and 0 deletions
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solr/solr-ref-guide/src/how-solrcloud-works.adoc
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@ -46,3 +46,9 @@ A SolrCloud cluster consists of some "logical" concepts layered on top of some "
* The number of Replicas that each Shard has determines: * The number of Replicas that each Shard has determines:
** The level of redundancy built into the Collection and how fault tolerant the Cluster can be in the event that some Nodes become unavailable. ** The level of redundancy built into the Collection and how fault tolerant the Cluster can be in the event that some Nodes become unavailable.
** The theoretical limit in the number concurrent search requests that can be processed under heavy load. ** The theoretical limit in the number concurrent search requests that can be processed under heavy load.
WARNING: Make sure the DNS resolution in your cluster is stable, ie.
for each live host belonging to a Cluster the host name always corresponds to the
same specific IP and physical node. For example, in clusters deployed on AWS this would
require setting `preserve_hostname: true` in `/etc/cloud/cloud.cfg`. Changing DNS resolution
of live nodes may lead to unexpected errors. See SOLR-13159 for more details.