Java exception.getMessage() wipes out the actual message from end and adds ... (557 bytes)

[Puspender Tanwar]

I am hitting a REST api using Spring Boot RestTemplate. If the error response is smaller, exception.getMessage() returns the complete JSON structure of error, but if the error JSON gets 3 4 more lines added, it wiped out from the few keys and add ...(557 bytes) at the last.

Getting perfect JSON error response if error body is smaller:

{
    "id": "xxxxxxxxx",
    "code": "INVALID_DATA",
    "message": "The request could not be completed. One or more validation errors were in the request.",
    "details": [
        {
            "code": "INVALID_VALUE",
            "target": "something",
            "message": "xxxxxxxxxxxxxxxxx",
        }
    ]
}

But if a few more keys gets added to the error JSON, I get the below string on `exception.getMessage()`

{
  "id" : "52400a58-4511-429a-b403-2213dd97dfe1",
  "code" : "INVALID_DATA",
  "message" : "The request could not be completed. One or more validation errors were in the request.",
  "details" : [ {
... (557 bytes)
}

The same API if I hit using Postman this is the complete error JSON:

{
    "id": "xxxxxxxxxxxxxxxxx",
    "code": "INVALID_DATA",
    "message": "The request could not be completed. One or more validation errors were in the request.",
    "details": [
        {
            "code": "INVALID_VALUE",
            "target": "something",
            "message": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            "innerError": {
                "unsatisfiedRequirements": [
                    "history"
                ],
                "history": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
            }
        }
    ]
}

How can I get the complete JSON out of exception message? And first of all, why is there a limit?

[Paul Clapham]

Puspender Tanwar wrote:And first of all, why is there a limit?

If there's a problem with, say, a 2-megabyte JSON, then putting the whole thing into the exception message verbatim would be considered annoyingly wasteful by a lot of users.

[Puspender Tanwar]

But how to get the actual error JSON then? I need to parse the JSON body.