edit

Author: kilfoyle

troubleshoot/elasticsearch/painless-array-list-manipulation-errors.md

@@ -7,15 +7,13 @@ products:
   - id: elasticsearch
 ---
 
-# Troubleshoot array/list manipulation errors in Painless
+# Troubleshoot array manipulation errors in Painless
 
-Follow these guidelines to avoid array access errors in your Painless script.
+Follow these guidelines to avoid array (list) access errors in your Painless scripts.
 
-## Array index\_out\_of\_bounds\_exception
+An array `index_out_of_bounds_exception` occurs when a script tries to access an element at a position that does not exist in the array. For example, if an array has two elements, trying to access a third element triggers this exception. 
 
-Array index out of bounds exceptions occur when a script tries to access an element at a position that does not exist in the array. For example, if an array has two elements, trying to access a third element will trigger this exception. 
-
-### Sample error
+## Sample error
 
 ```json
 {
@@ -71,7 +69,7 @@ Array index out of bounds exceptions occur when a script tries to access an elem
 }
 ```
 
-### Problematic code
+## Problematic code
 
 ```json
 {
@@ -92,13 +90,13 @@ Array index out of bounds exceptions occur when a script tries to access an elem
 }
 ```
 
-### Root cause
+## Root cause
 
 The error occurs because the script tries to access index 2 (the third element) in an array that only has two elements (indices 0, 1). Arrays in Painless are zero-indexed, so accessing an index greater than or equal to the array size causes an exception.
 
-### Solution: Check array bounds before accessing
+## Solution: Check array bounds before accessing
 
-Always verify array size before accessing specific indices:
+Always verify the size of an array before accessing specific indices:
 
 ```json
 GET blog_posts/_search
@@ -125,7 +123,7 @@ GET blog_posts/_search
 }
 ```
 
-### Sample document
+## Sample document
 
 ```json
 POST blog_posts/_doc
@@ -136,7 +134,7 @@ POST blog_posts/_doc
 }
 ```
 
-### Results
+## Results
 
 ```json
 {
@@ -159,8 +157,8 @@ POST blog_posts/_doc
 }
 ```
 
-### Notes
+## Notes
 
-* **Array bounds:** Always check array size before accessing specific indices.  
-* **Zero-indexed:** Remember that arrays start at index 0, so size() \- 1 is the last valid index.  
-* **Empty arrays:** Handle cases where arrays might be completely empty (size() \== 0).
+* **Array bounds:** Always check the size of an array before accessing specific indices.  
+* **Zero-indexed:** Remember that arrays start at index 0, so `size() - 1` is the last valid index.  
+* **Empty arrays:** Handle cases where arrays might be completely empty (`size() == 0`).

troubleshoot/elasticsearch/painless-date-math-errors.md

@@ -9,15 +9,11 @@ products:
 
 # Troubleshoot date math errors in Painless
 
-Follow these guidelines to avoid [date](elasticsearch://reference/scripting-languages/painless/using-datetime-in-painless.md) operation errors in your Painless script.
+Follow these guidelines to avoid [date](elasticsearch://reference/scripting-languages/painless/using-datetime-in-painless.md) operation errors in your Painless scripts.
 
-## Runtime mappings context
+When you work with date fields in runtime mappings, accessing methods directly on the document field object can cause errors if the proper value accessor is not used.
 
-### Dynamic method not found error
-
-When working with date fields in runtime mappings, accessing methods directly on the document field object can cause errors if the proper value accessor is not used.
-
-### Error
+## Error
 
 ```json
 {
@@ -76,7 +72,7 @@ When working with date fields in runtime mappings, accessing methods directly on
 }
 ```
 
-### Problematic code
+## Problematic code
 
 ```json
 "script": {
@@ -88,25 +84,25 @@ When working with date fields in runtime mappings, accessing methods directly on
 }
 ```
 
-### Root cause
+## Root cause
 
 The script attempts to call `toInstant()` directly on a `ScriptDocValues.Dates` object. Date fields in Painless require accessing the `.value` property to get the actual date value before calling date methods.
 
-### Solution
+## Solution
 
 Access the date value using `.value` before calling date methods:
 
 ```json
 "script": {
   "lang": "painless",
   "source": """
-    def orderDate = doc['order_date'].value; // added .value here
+    def orderDate = doc['order_date'].value; // Appended `.value` to the method.
     emit(orderDate.toInstant().toEpochMilli() + 14400000);
   """
 }
 ```
 
-### Notes
+## Notes
 
 * Always use `.value` when accessing single values from document fields in Painless.  
 * Check for empty fields when the field might not exist in all documents.  

troubleshoot/elasticsearch/painless-field-not-found.md

@@ -1,21 +1,19 @@
 ---
-navigation_title: Field not found (mapping conflicts)
+navigation_title: Field not found errors
 applies_to:
   stack: ga
   serverless: ga
 products:
   - id: elasticsearch
 ---
 
-# Troubleshoot field not found (mapping conflicts) in Painless
+# Troubleshoot field not found errors in Painless
 
-Follow these guidelines to avoid field access errors in your Painless script.
+Follow these guidelines to avoid field access errors in your Painless scripts.
 
-## A document doesn't have a value for a field
+When you work with document fields, attempting to access fields that don't exist in all documents or aren't properly mapped leads to field not found exceptions, causing script failures.
 
-When working with document fields, attempting to access fields that don't exist in all documents or aren't properly mapped leads to field not found exceptions, causing script failures.
-
-### Sample error
+## Sample error
 
 ```json
 {
@@ -78,7 +76,7 @@ When working with document fields, attempting to access fields that don't exist
 }
 ```
 
-### Problematic code
+## Problematic code
 
 ```json
 {
@@ -98,13 +96,13 @@ When working with document fields, attempting to access fields that don't exist
 }
 ```
 
-### Root cause
+## Root cause
 
 A field not found exception occurs when a script tries to access a field that is not defined in the index mappings. If the field is defined in the mappings but has no value in some documents, the script will not fail as long as you first check whether the field has values.  
 
-For example, calling `doc['author_score'].value` directly on a document without that field will cause an error. The recommended approach is to use `doc[<field>].size()==0` to check if the field is missing in a document before accessing its value.
+For example, calling `doc['author_score'].value` directly on a document that does not contain that field causes an error. The recommended approach is to use `doc[<field>].size()==0` to check if the field is missing in a document before accessing its value.
 
-### Sample documents
+## Sample documents
 
 ```json
 POST articles/_doc
@@ -123,9 +121,9 @@ POST articles/_doc
 }
 ```
 
-### Solution 1: Check field existence before accessing
+## Solution 1: Check field existence before accessing
 
-Always verify field existence using `size()` before accessing field values:
+Always verify the existence of a field by using `size()` before accessing field values:
 
 ```json
 GET articles/_search
@@ -152,9 +150,9 @@ GET articles/_search
 }
 ```
 
-### Solution 2: New field API approach
+## Solution 2: New field API approach
 
-The [field API](/explore-analyze/scripting/script-fields-api.md) provides a more elegant solution that handles missing values automatically by allowing you to specify default values. This approach is more concise and eliminates the need for explicit field existence checks:
+The [field API](/explore-analyze/scripting/script-fields-api.md) provides a more elegant solution that handles missing values automatically, by allowing you to specify default values. This approach is more concise and eliminates the need for explicit field existence checks:
 
 ```json
 GET articles/_search
@@ -178,9 +176,9 @@ GET articles/_search
 }
 ```
 
-### Solution 3: Use the $ shortcut in field API syntax
+## Solution 3: Use the $ shortcut in field API syntax
 
-With the field API you can make the solution even more concise using the `$` shortcut:
+With the field API, you can make the solution even more concise using the `$` shortcut:
 
 ```json
 GET articles/_search
@@ -204,7 +202,7 @@ GET articles/_search
 }
 ```
 
-### Results
+## Results
 
 ```json
 {
@@ -238,12 +236,10 @@ GET articles/_search
 }
 ```
 
-### Notes
+## Notes
 
-* **Field presence:** Always check if fields exist before accessing them using `.size() > 0`.  
+* **Field presence:** Always check if fields exist before accessing them, using `.size() > 0`.  
 * **Document variation:** Not all documents are guaranteed to have the same field structure.  
 * **Mapping awareness:** A field must be defined in the index mappings to be accessed with doc values, and its value in each document must be validated.  
-* **Field API:** The `field` API and `$` shortcut handle missing values gracefully with default values.  
-* **Compatibility:** Some field types (like `text` or `geo`) [aren't yet supported](/explore-analyze/scripting/script-fields-api.md#_supported_mapped_field_types) by the field API; continue using `doc` for those.
-
-
+* **Field API:** The `field` API and `$` shortcut handle missing values gracefully, using default values.  
+* **Compatibility:** Some field types (such as `text` or `geo`) [aren't yet supported](/explore-analyze/scripting/script-fields-api.md#_supported_mapped_field_types) by the field API; continue using `doc` for those.

troubleshoot/elasticsearch/painless-ingest-pipeline-failures.md

@@ -9,15 +9,11 @@ products:
 
 # Troubleshoot ingest pipeline failures in Painless
 
-Follow these guidelines to avoid [ingest pipeline](elasticsearch://reference/scripting-languages/painless/painless-ingest-processor-context.md) script errors in your Painless script.
+Follow these guidelines to avoid [ingest pipeline](elasticsearch://reference/scripting-languages/painless/painless-ingest-processor-context.md) errors in your Painless scripts.
 
-## Date conversion
+When you convert time strings to nanoseconds in ingest pipelines, attempting to perform arithmetic operations directly on string values without proper date parsing causes type casting errors. 
 
-### Class cast exception when converting date data types
-
-When converting time strings to nanoseconds in ingest pipelines, attempting to perform arithmetic operations directly on string values without proper date parsing leads to type casting errors. 
-
-### Sample error
+## Sample error
 
 ```json
 {
@@ -64,7 +60,7 @@ When converting time strings to nanoseconds in ingest pipelines, attempting to p
 }
 ```
 
-### Problematic code
+## Problematic code
 
 ```json
 {
@@ -76,11 +72,11 @@ When converting time strings to nanoseconds in ingest pipelines, attempting to p
 }
 ```
 
-### Root cause
+## Root cause
 
-When accessing fields via `ctx.time_field` in ingest pipelines, the values are not automatically parsed to their mapped field types. The script attempts to multiply a string value (time field) directly with an integer. Time strings like `"00:00:00.022"` remain as strings and need to be properly parsed as dates and converted to epoch milliseconds before performing arithmetic operations.
+When accessing fields using `ctx.time_field` in ingest pipelines, the values are not automatically parsed to their mapped field types. The script attempts to multiply a string value (time field) directly with an integer. Time strings such as `"00:00:00.022"` remain as strings. They need to be properly parsed as dates and converted to epoch milliseconds before performing arithmetic operations.
 
-### Solution: Use `SimpleDateFormat` in the script processor
+## Solution: Use `SimpleDateFormat` in the script processor
 
 Parse the time string directly using SimpleDateFormat and get epoch milliseconds:
 
@@ -113,7 +109,7 @@ POST _ingest/pipeline/_simulate
 }
 ```
 
-### Result
+## Result
 
 ```json
 {
@@ -136,7 +132,7 @@ POST _ingest/pipeline/_simulate
 }
 ```
 
-### Note
+## Notes
 
-* Time strings like `"HH:mm:ss.SSS"` must be explicitly parsed before arithmetic operations.  
+* Time strings such as `"HH:mm:ss.SSS"` must be explicitly parsed before performaing arithmetic operations.  
 * Using `SimpleDateFormat` in a script processor allows custom parsing.

troubleshoot/elasticsearch/painless-null-pointer-exceptions.md

@@ -9,17 +9,11 @@ products:
 
 # Troubleshoot null pointer exceptions in Painless
 
-Follow these guidelines to avoid null pointer exceptions in your Painless script.
+Follow these guidelines to avoid null pointer exceptions in your Painless scripts.
 
-## Null\_pointer\_exception
+In Painless, field access methods vary depending on the script execution [context](elasticsearch://reference/scripting-languages/painless/painless-contexts.md). Using a field access pattern that is not valid for the current script context causes a `null_pointer_exception`.
 
-Null pointer exceptions in Painless scripts often occur due to using field access patterns that are not valid for the current script context. 
-
-### Wrong field access patterns in script contexts
-
-When writing Painless scripts in different [contexts](elasticsearch://reference/scripting-languages/painless/painless-contexts.md), using wrong field access patterns leads to null pointer exceptions because field access methods vary depending on the script execution context.
-
-### Sample error
+## Sample error
 
 ```json
 {
@@ -109,7 +103,8 @@ POST products/_doc
 
 ### Root cause
 
-A common cause of null pointer exceptions in Painless scripts is attempting to access document fields using incorrect access patterns for the specific [script context](elasticsearch://reference/scripting-languages/painless/painless-contexts.md). In Painless, field access methods are context-dependent. For more information, refer to "Painless syntax-context bridge" in the Explore and Analyze documentation. 
+A common cause of null pointer exceptions in Painless scripts is attempting to access document fields using incorrect access patterns for the specific [script context](elasticsearch://reference/scripting-languages/painless/painless-contexts.md). To learn more about the context-dependent field access methods in Painless, refer to Painless syntax-context bridge in the Explore and Analyze documentation. 
+% Link to come after E&A PR is merged.
 
 The error occurs because `params['_source']` is not available in script filter contexts. In script filters, field values must be accessed through `doc` values, not through the `params['_source']` map.
 
@@ -167,5 +162,3 @@ GET products/_search
 * **Context limitations:** Script filters cannot access `params['_source']` .  
 * **Field mapping:** Use `.keyword` suffix for text fields when accessing via doc values.
 
-For more details related to Painless context, refer to [Painless context documentation](elasticsearch://reference/scripting-languages/painless/painless-contexts.md) and Painless syntax-context bridge. 
-