techdocsmith commented on a change in pull request #11755:
URL: https://github.com/apache/druid/pull/11755#discussion_r719580831
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File path: docs/configuration/index.md
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@@ -631,6 +631,48 @@ Store task logs in HDFS. Note that the
`druid-hdfs-storage` extension must be lo
|`druid.indexer.logs.kill.initialDelay`| Optional. Number of milliseconds
after Overlord start when first auto kill is run. |random value less than
300000 (5 mins)|
|`druid.indexer.logs.kill.delay`|Optional. Number of milliseconds of delay
between successive executions of auto kill run. |21600000 (6 hours)|
+### API error response
+
+You can configure Druid API error responses to hide internal information like
the Druid class name, stack trace, thread name, servlet name, code, line/column
number, host, or IP address.
+
+|Property|Description|Default|
+|--------|-----------|-------|
+|`druid.server.http.showDetailedJettyErrors`|When set to true, any error from
the Jetty layer / Jetty filter includes `servlet`, `message`, `url`, `status`,
and `cause`, if it exists, fields in the JSON response. When set to false, the
JSON response only includes `message`, `url`, and `status`. The field values
remain unchanged.|true|
+|`druid.server.http.errorResponseTransformStrategy.strategy`|Error response
transform strategy. The strategy controls how Druid transforms error responses
from Druid services. When unset or set to `none`, Druid leaves error responses
unchanged.|`none`|
+
+##### Error response transform strategy
+
+You can use an error response transform strategy to transform error responses
from within Druid services to hide internal information.
+When you specify an error response transform strategy other than `none`, Druid
transforms the error responses from Druid services as follows:
+ - For any query API that fails in the Router service, Druid sets the fields
`errorClass` and `host` to null. Druid applies the transformation strategy to
the `errorMessage` field.
+ - For Any SQL query API, for example `POST /druid/v2/sql/...` that fails,
Druid sets the fields `errorClass` and `host` to null. Druid applies the
transformation strategy to the `errorMessage` field.
Review comment:
```suggestion
- For Any SQL query API that fails, for example `POST /druid/v2/sql/...`,
Druid sets the fields `errorClass` and `host` to null. Druid applies the
transformation strategy to the `errorMessage` field.
```
sorry another minor edit
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