Doc update for ZooKeeper stat command configuration for Monitor Overview.
diff --git a/_docs-2/administration/monitoring-metrics.md b/_docs-2/administration/monitoring-metrics.md
index a22d85f..f04c3ab 100644
--- a/_docs-2/administration/monitoring-metrics.md
+++ b/_docs-2/administration/monitoring-metrics.md
@@ -21,6 +21,11 @@
<img src="{{ site.baseurl }}/images/accumulo-monitor-1.png" alt="monitor overview"/>
</a>
+Note: If the Zookeeper information is not available on the Overview, your version of zookeeper may
+require setting the four-letter-word command whitelist to allow the stat command.
+See [Configuration - Zookeeper Considerations] for more
+information.
+
The Master Server, Tablet Servers, and Tables pages display metrics grouped in different ways (e.g. by tablet server or by table).
Metrics typically include number of entries (key/value pairs), ingest and query rates.
The number of running scans, major and minor compactions are in the form _number_running_ (_number_queued_).
@@ -112,3 +117,4 @@
[grafana-post]: {{ site.baseurl }}/blog/2018/03/22/view-metrics-in-grafana.html
[metrics2-javadoc]: https://hadoop.apache.org/docs/current/api/org/apache/hadoop/metrics2/package-summary.html
[tracing]: {% durl troubleshooting/tracing %}
+[Configuration - Zookeeper Considerations]: {% durl configuration/overview#monitor-and-zookeeper-four-letter-word-command-whitelist %}
diff --git a/_docs-2/configuration/overview.md b/_docs-2/configuration/overview.md
index 972d35e..e5af6c6 100644
--- a/_docs-2/configuration/overview.md
+++ b/_docs-2/configuration/overview.md
@@ -86,6 +86,8 @@
### Zookeeper Considerations
+#### Storing Accumulo Server Properties
+
Any [server properties] that are set in Zookeeper should consider the limitations of Zookeeper itself with respect to the
number of nodes and the size of the node data. Custom table properties and options for Iterators configured on tables
are two areas in which there aren't any fail safes built into the API that can prevent the user from making this mistake.
@@ -93,6 +95,17 @@
While these properties have the ability to add some much needed dynamic configuration tools, use cases which might fall
into these warnings should be reconsidered.
+#### Monitor and Zookeeper Four-Letter-Word command whitelist
+
+Starting with Zookeeper version 3.5.3, the Four Letter Words commands must be enabled with the
+zookeeper property: 4lw.commands.whitelist. The monitor uses the stat command to provide zookeeper server(s),
+mode and number of clients. At a minimum, add the following to your zookeeper configuration (zoo.cfg):
+```
+4lw.commands.whitelist=stat
+```
+See [Zookeeper Administration Documentation] for your zookeeper version for other four-letter-word
+command whitelist options.
+
## Viewing Server Configuration
Accumulo's current configuration can be viewed in the shell using the `config` command.
@@ -133,3 +146,4 @@
[table.* properties]: {% purl table.\* %}
[accumulo-client.properties]: {% durl configuration/files#accumulo-clientproperties %}
[accumulo.properties]: {% durl configuration/files#accumuloproperties %}
+[Zookeeper Administration Documentation]: https://zookeeper.apache.org/doc/r3.5.7/zookeeperAdmin.html
