mapSummary.errors
|
Property Description |
Holds all serialized errors thrown from the map(mapContext) function. May also hold the |
|
Type |
iterator |
|
Since |
2015.2 |
Members
|
Member |
Type |
Required/Optional |
Description |
|---|---|---|---|
|
iterator().each(parameters) |
function |
required |
Executes one time for each error. |
parameters
|
Member |
Type |
Required/Optional |
Description |
|---|---|---|---|
|
iteratorFunction(key, error, executionNo) See also functionParameters. |
function |
required |
Provides logic to be executed during each iteration. |
functionParameters
|
Parameter |
Type |
Required/Optional |
Description |
|---|---|---|---|
|
key |
string |
optional |
Represents a key that was passed to the map stage for processing. |
|
error |
string |
optional |
The error thrown during processing of the corresponding key. |
|
executionNo |
number |
optional |
Indicates whether the error occurred during the first, second, third, or fourth attempt to process the key. |
Syntax
The following snippets show three ways you could use this iterator.
This code is not a functional example. For a complete script example, see Map/Reduce Script Samples.
// Add additional code
...
// Create a log entry showing each full serialized error
summary.mapSummary.errors.iterator().each(
function (key, error, executionNo) {
log.error({
title: 'Map error for key: ' + key + ", execution no. ' + executionNo,
details: error
});
return true;
}
);
// Log only the name and description of each error thrown
summary.mapSummary.errors.iterator().each(
function (key, error, executionNo) {
var errorObject = JSON.parse(error);
log.error({
title: Map error for key: ' + key + ", execution no. ' + executionNo,
details: errorObject.name + ': ' + errorObject.message
});
return true;
}
);
// Calculate and log the total number of errors encountered during the map stage
var errorCount = 0;
summary.mapSummary.errors.iterator().each(
function() {
errorCount++;
return true;
}
);
log.audit({
title: Map stage errors',
details: 'Total number of errors: ' + errorCount
});
...
// Add additional code