TikaServer, cancelling request client-side does not kill working OCR process

It appears that canceling a request will not stop work in Tika. The handler finishes the job and then fails as it attempts to return data.

I would have expected tika to detect client-side cancellations and propagate this to relevant child processes, like tesseract, thus avoiding unnecessary work.

I send a request like so. Here FILE is a pdf that has inline images and requires OCR scanning.

curl -T "$FILE" \
          -s "http://localhost:9998/tika/text" \
          -H "Accept: application/json" \
          -H "X-Tika-OCRLanguage: dan+eng" \
          -H "X-Tika-PDFextractInlineImages: true"

Then "ctrl-C" before the response is returned.

Dockerfile:

FROM apache/tika:2.0.0-full

RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get -y install tesseract-ocr-dan

docker-compose.yaml:

version: "3.9"


services:
  tika:
    build: tika/
    ports:
      - "9998:9998"