Servlet filter is swallowing response body

[whiskeysierra]

I don't have a reproducible test case, but when enabling the Jolokia endpoint in a Spring Boot application (http://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-jmx.html#production-ready-jolokia) it neither logs nor writes the original response body:

Issuing this request:

GET /jolokia/read/java.lang:type=Memory/HeapMemoryUsage/used HTTP/1.1
Cookie: JSESSIONID=PErsV8g5P12cKvCmMZ3L29fR
Authorization: XXX
Cache-Control: no-cache
Accept: */*
Connection: keep-alive
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/45.0.2454.101 Chrome/45.0.2454.101 Safari/537.36
Host: localhost:8080
Postman-Token: d7248d0c-1e58-409e-003d-d9fdd8c6850c
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-US,en;q=0.8

will only log this response:

HTTP/1.1 200
Strict-Transport-Security: max-age=31536000 ; includeSubDomains
Cache-Control: no-cache
Pragma: no-cache
Expires: Tue, 03 Nov 2015 11:11:06 GMT
X-Application-Context: application
Date: Tue, 03 Nov 2015 12:11:06 GMT
Content-Type: text/plain;charset=utf-8

When I disable the logbook filter the response is returned to the browser.

{
  "request": {
    "path": "used",
    "mbean": "java.lang:type=Memory",
    "attribute": "HeapMemoryUsage",
    "type": "read"
  },
  "value": 195264032,
  "timestamp": 1446552834,
  "status": 200
}