Re: Httpd is hanging intermittently

[Otis Dewitt - NOAA Affiliate <otis.dewitt@xxxxxxxxxxxxxxxxxxxx>]

I don't think "insufficient entropy" has anything to do with Apache, but you could try installing "haveged" rpm.

That may solve your problem.

On Wed, Sep 22, 2021 at 2:11 PM alchemist vk <alchemist.vk@xxxxxxxxx> wrote:

Hi All,

 We are using httpd version 2.4.46 and its working fine for a long time. But recently, we started seeing an issue where apache hangs indefinitely even when the system is in idle state.

And when apache hangs, I see below entries in error_log:

[Tue Sep 21 22:05:53.243013 2021] [ssl:warn] [pid 5769:tid 2644435888] AH01990: Server: PRNG still contains insufficient entropy!

[Tue Sep 21 22:05:54.501476 2021] [ssl:warn] [pid 5769:tid 2787111856] AH01990: Server: PRNG still contains insufficient entropy!

[Tue Sep 21 22:05:54.502449 2021] [ssl:warn] [pid 5769:tid 2787111856] AH01990: Server: PRNG still contains insufficient entropy!

...

....

....

I am pretty sure, we not changed anything related to httpd config for quite a time time and have no idea, why this issue started getting manifested now.

Please help me how to RC this and what logs can be looked to debug further?

PS: Occurence of issue is more in systems where FIPS is enabled. In FIPS disabled systems, occurrence is less.

With Regards

Venkat