Docker container fails to start (v1.7.35)

[brmuire]

Describe the bug

Docker container fails to start for image version: 1.7.35. We were previously using image version 1.7.26 without issue.

Error:

Running version 1.7.35
synchronization period = 60 minutes
Deploying web application
extra indexer options: -S -G -T 6
Checking if index matches current version
Traceback (most recent call last):
  File "/scripts/start.py", line 608, in <module>
    main()
  File "/scripts/start.py", line 519, in main
    check_index_and_wipe_out(logger)
  File "/scripts/start.py", line 423, in check_index_and_wipe_out
    indexer.execute()
  File "/usr/local/lib/python3.10/dist-packages/opengrok_tools/utils/command.py", line 228, in execute
    output_thread = OutputThread(output_event, self.logger,
  File "/usr/local/lib/python3.10/dist-packages/opengrok_tools/utils/command.py", line 172, in __init__
    self.start()
  File "/usr/lib/python3.10/threading.py", line 928, in start
    _start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread

docker-compose.yml (we create two containers, a primary and secondary):

version: "3.0"
services:
    primary:
        image: opengrok/docker:1.7.26
        ports:
            - 8080
        volumes:
            - /export/opengrok/source:/opengrok/src:ro
            - primary-config:/opengrok/etc
            - primary-index:/opengrok/data
            - ./opengrok/primary_footer:/opengrok/data/footer_include
            - ./opengrok/style.css:/opengrok/data/http_header_include
        restart: unless-stopped
        networks:
            webproxy:
                aliases:
                    - opengrok-primary
            prometheus:
                aliases:
                    - opengrok-primary
        environment:
            SYNC_PERIOD_MINUTES: 60
            CHECK_INDEX: "yes"
            AVOID_PROJECTS: "yes"
            NOMIRROR: "yes"
            INDEXER_OPT: "-S -G -T 6"
    secondary:
        image: opengrok/docker:1.7.26
        ports:
            - 8080
        volumes:
            - /export/opengrok/source:/opengrok/src:ro
            - secondary-config:/opengrok/etc
            - secondary-index:/opengrok/data
            - ./opengrok/secondary_footer:/opengrok/data/footer_include
            - ./opengrok/style.css:/opengrok/data/http_header_include
        restart: unless-stopped
        networks:
            webproxy:
                aliases:
                    - opengrok-secondary
            prometheus:
                aliases:
                    - opengrok-secondary
        environment:
            SYNC_PERIOD_MINUTES: 60
            CHECK_INDEX: "yes"
            AVOID_PROJECTS: "yes"
            NOMIRROR: "yes"
            INDEXER_OPT: "-S -G -T 6"
volumes:
    primary-index:
    primary-config:
    secondary-index:
    secondary-config:

To Reproduce Steps to reproduce the behavior: docker-compose up or docker exec -it opengrok_secondary_1 /scripts/start.py

Expected behavior

Container starts

Screenshots

Additional context