Critical issue on nginx worker exited on signal 4

[hieuhtr]

Critical issue on nginx worker exited on signal 4

[hieuhtr]

Hi guys, sorry for late update. I tried several ways but there is no hope on latest codebase.

I reverted build step by this commit hash 6e975bcb015f62e1f303054897783355e2a877dc thanks @NicolasCARPi for recommendation.

Here is my simple solution.

FROM debian:bullseye-slim AS builder

ARG NGINX_VERSION=1.24.0
ARG MOD_SECURITY_VERSION=3.0.8

# https://github.com/google/ngx_brotli/issues/166
ENV NGX_BROTLI_COMMIT_HASH=6e975bcb015f62e1f303054897783355e2a877dc

WORKDIR /root/

# Download nginx source
RUN wget http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz \
    && tar zxf nginx-${NGINX_VERSION}.tar.gz

# Install & Compile dynamic module Brotli
RUN git clone https://github.com/google/ngx_brotli \
    && cd ngx_brotli && git reset --hard $NGX_BROTLI_COMMIT_HASH \
    && git submodule update --init \
    && cd ../nginx-${NGINX_VERSION} \
    && ./configure --with-compat --add-dynamic-module=../ngx_brotli \
    && make modules

...

[simneu]

hi @hieuhtr,

I'm facing similar issues with a recent (but new, we didn't use brotli before) release. Did you find a resolution yet?

On my side:

• exit on signal 4 is happening every time we have brotli on in our configuration and nginx tries to serve a br compressed page. Removing brotli on from config fixes the issue.
• setup is using nginx:1.18.0 and ngx_brotli module was compiled and then packed into an AWS AMI, than we then are trying to use on our final instances. The instance building the AWS AMI and the actual end instance using the AMI are both amd64 (if that can hint to a particular direction, cause I thought this could be a module compilation issue.
• I tried debugging (with limited knowledge) what causes the signal 4, but couldn't find any hints yet.

Thanks.

[NicolasCARPi]

Had the same issue (elabftw/elabftw#4600). Had to revert to using commit 6e975bc because newer version cause this crash. Hope it can be adressed, or we'll all be stuck to this working commit ;)

It's with nginx 1.24. Full Dockerfile is available here: https://github.com/elabftw/elabimg/blob/master/Dockerfile

[simneu]

Awesome @NicolasCARPi, thanks for taking the time to help. 👍

I'll try commit you suggested when I get few minutes, and will update here with news.