5 Replies Latest reply on Aug 26, 2019 9:07 AM by dambldor4444

Segmentation fault with httpd 2.4.38 and mod_cluster

j_sykora Mar 11, 2019 11:19 AM

Hi,

i have an issue with mod_cluster with newest apache server 2.4.38.

I got an error "Segmentation fault" when it it is builded with below prerequisities. I try to use also any others openssl version 1.0.2 or 1.1.0 but it is same situation.

It is OK when i tried to build with apache 2.4.37 and used same configuration.

Do you have any experience with apache 2.4.38 with mod_cluster ?

Thanks

Jan

Builded on RHEL 7.4

Builded with:

APR=apr-1.6.5.tar.gz

APR_UTIL=apr-util-1.6.1.tar.gz

HTTPD=httpd-2.4.38.tar.gz

LIBXML=libxml2-2.9.7.tar.gz

M4=m4-1.4.18.tar.gz

MOD_CLUSTER=mod_cluster-1.3.10.Final.tar.gz

MOD_SECURITY=modsecurity-2.9.2.tar.gz

NGHTTP2=nghttp2-1.36.0.tar.gz

OPENSSL=openssl-1.1.1a.tar.gz

PCRE=pcre-8.42.tar.gz

1. Re: Segmentation fault with httpd 2.4.38 and mod_cluster

jfclere Mar 27, 2019 3:09 AM (in response to j_sykora)

I have fixed an issue with trunk in master Make sure the SIZEOFSCORE is bigger than sizeof(proxy_worker_shared). · modcluster/mod_proxy_cluster@d3cb67c · GitHub that is probably the issue.
Don't use mod_cluster-1.3.10.Final.tar.gz, it is old....
If master fixes the problem I will back port the fix to 1.3.x and tag.
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2. Re: Segmentation fault with httpd 2.4.38 and mod_cluster

ck6356 Apr 2, 2019 3:33 PM (in response to jfclere)

I believe that I am impacted by this same issue. I am using same Apache and mod_cluster versions as Jan. Apache is logging this error message: AH00051: child pid XXXXX exit signal Segmentation fault (11), possible coredump in ..., when Apache is setup with an https listener port, and mod_cluster connection is configured. It sounds like you intend to release the fix (mod_cluster v1.3.11?). If so, do you have an estimated timeframe? Also, can you tell me if this same issue impacts mod_cluster v1.4.0? Thanks
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3. Re: Segmentation fault with httpd 2.4.38 and mod_cluster

j_sykora Apr 4, 2019 4:35 AM (in response to jfclere)

Hi tried to use your change in 1.3.10-Final (this is last 1.3 version which I found in GiH)
Unfortunately issue is the same.
As I check segmentation fault error was shown after first status message which came from jboss server. And it was repeated in apache error log until I deleted manager slotmem files in httpd. Possible error in manager module?
I'm able to provide core dump from httpd server, if will be usefull
Jan
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4. Re: Segmentation fault with httpd 2.4.38 and mod_cluster

rhusar Apr 8, 2019 5:22 AM (in response to j_sykora)

We need to get a release out soon, until then, just build master yourself.
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5. Re: Segmentation fault with httpd 2.4.38 and mod_cluster

dambldor4444 Aug 26, 2019 9:07 AM (in response to jfclere)

How can I get the latest release for linux? I compiled 1.3.12 and tried to change basic native modules but the problem didn't dissapear. I asked question on stackoverflow with my confs: apache2 - Mod_cluster + apache + wildfly via http - Stack Overflow
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