The POST to our DATA_ACTION endpoint is failing intermittently with a 400 Bad Request - says the JSON is invalid, but it’s passing validation on our side. It’s happening on about 1 in 20 calls - makes debugging a nightmare. We’re using the JAVA_SDK version 4.0.109, hitting /api/v2/dataactions/{dataActionId}/execute with a simple string payload - just a customer ID.
Tried: wrapping the payload in quotes, different content types - nothing sticks. The ARCHITECT flow is basic - just a DATA ACTION node, no variables involved, straight POST. It’s almost like the API_GATEWAY is having a moment. Anyone found a similar issue, or a way to reliably force a retry on that 400? Don’t care about the root cause, just want it to not break duction.
The 400 error… it sounds like the connector maybe is not sending the content type header correctly. We’re on Zoom Contact Center, so the Data Action connector there sometimes has issues with the payload format.
Try setting the Content-Type header to text/plain directly in the Java SDK request. It’s possible the default is something unexpected. Something like this -
String payload = "12345"; // your customer ID
String contentType = "text/plain";
// Configure the request
RequestConfig requestConfig = RequestConfig.builder()
.addHeader("Content-Type", contentType)
.build();
// Execute the Data Action
DataActionResponse response = client.getDataActionApi().executeDataAction(dataActionId, payload, requestConfig);
Also, can you check the response body when the error happens? It usually shows more detail on what is invalid in the JSON. It doesn’t always say ‘JSON’ - sometimes it complains about the schema.
We had a similar issue with a webhook trigger - it was dropping the contactListId field. The router needs the array to be structured correctly. If the payload is just a string it should work, but the header might be the blem.
PlatformClientV2 actually enforces strict schema validation on the data action payload, even for seemingly simple string types. We encountered this issue - precisely this intermittent 400 error - during the rollout of a customer identification service three years ago. The initial symptom was identical: passing validation locally, failing intermittently in duction. It took some investigation to determine the root cause.
Cause:
The Java SDK, by default, appears to wrap the string payload in a JSON array, effectively sending ["12345"] instead of the expected plain string "12345". The data action endpoint interprets this as invalid JSON. It’s not a content type issue, as the connector will accept either way. It’s the payload structure. The intermittent nature stemmed from slight timing differences in the SDK’s serialization cess - sometimes it’d wrap the string, sometimes not.
Solution:
Modify the request to explicitly send the string without the surrounding array. This can be accomplished by setting the request body to the string directly.
String payload = "12345"; // your customer ID
try {
DataActionExecuteResponse response = client.getDataActionApi().executeDataAction(dataActionId, payload, null, null);
// cess the response
} catch (ApiException e) {
// Handle the error
System.err.println("Error executing data action: " + e.getCode());
}
The key is to omit any additional JSON wrapping when constructing the request body. The PlatformClientV2 handles the necessary formatting when the payload is passed as a simple string. We’ve implemented a similar pattern for all data action interactions in our duction environment and have not experienced the issue since.
The situation described - intermittent 400 errors with a seemingly valid payload - is surprisingly common, and it’s not usually a blem with the payload itself, but rather how it’s interpreted at the endpoint (which is frequently overlooked). Data Actions, as they’ve evolved, have become rather…particular about their input. The suggestion above regarding the Content-Type header is a good starting point - the system’s expectations can be very strict, and the SDK’s defaults aren’t always what you’d expect. It’s worth confirming that’s handled correctly, of course.
Cause: PlatformClientV2, and the underlying architecture, performs schema validation - even against simple string types - and the Java SDK, in its default configuration, tends to serialize strings in a way that introduces subtle formatting differences that the validation cess flags. Specifically, it appears to be adding extra characters (perhaps control characters, or unexpected whitespace) around the payload, which, while invisible to the eye, cause the endpoint to reject it. It’s almost as if it’s doing a strict string comparison rather than interpreting the data as a simple identifier.
Solution: Explicitly control the serialization cess. Instead of letting the SDK handle the string conversion, try wrapping the customer ID in a JSON object - even a minimal one - and setting the Content-Type header to application/json. Something like this: {"customerId": "12345"}. It adds a layer of abstraction, forces a consistent format, and - from experience - resolves this type of intermittent failure. We’ve seen this particular issue a lot with simpler Data Actions, and it’s almost always that subtle serialization blem.
Hi all,
We’ve encountered similar inconsistencies when integrating DATA ACTIONS within our ARCHITECT flows - specifically concerning string payloads and SCHEMA validation. The intermittent nature of the 400 errors suggests the SDK is occasionally serializing the payload in a format the DATA ACTION endpoint rejects, despite passing local validation checks. Consider this simplified data flow -
[JAVA SDK] --> [HTTP POST] --> [DATA ACTION Endpoint]
| Payload: "CustomerID" | | JSON Validation
| Content-Type: ? | | (strict schema)
V
[400 Error (intermittent)]
The issue isn’t necessarily the payload content but how it’s presented. Building on the suggestion regarding the CONTENT-TYPE header, explicitly define the payload as a JSON string - even for simple values - using the following configuration within your JAVA SDK request. This ensures the DATA ACTION endpoint receives a correctly formatted request body.
String payload = "{\"customer_id\": \"12345\"}";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<>(payload, headers);
It’s also prudent to confirm the SCHEMA associated with the DATA ACTION has been accurately defined to accept the string value within the specified JSON structure. Inconsistent SCHEMA definitions are a frequent source of these types of errors.