Using https : Insanely High CPU usage and memory allocations and Wildfly becoming unresponsive (Wildfly 23)

[Olivier Masseau]

Hello,

We noticed some huge problems when activating https on Wildfly 23.

With some moderate load, suddenly Wildfly becomes totally unresponsive.
We have 8 cores and can see a 800% cpu usage.

We ran a JFR profiling when Wildfly was unresponsive and it seems it is related to the SSL as you can see :

Memory allocation is also insane (5 minutes profiling) :

All the I/O threads seems to be stuck in SSL hanshake.

Do you know if there is any bug in Wildfly 23 (or later versions) /undertow with the SSL handshake ?

Note : We forced supported TSL version to 1.2.

[Jose Socola]

Hi,

Try upgrade the undertow module to last version.

Io.undertow

Jboss.xnio

Jboss.logging

Regards,

JS

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[John Saccoccio]

Spare yourselves, I've wasted way too much time on this, including farting around trying to upgrade the undertow module.  https://bugzilla.redhat.com/show_bug.cgi?id=2174246

Just downgrade your JVM minor version per above.

They're only publishing a patch in paid-for jBoss EAP  https://access.redhat.com/solutions/6997164

On Friday, November 24, 2023 at 9:00:24 AM UTC-5 Jose Socola wrote:

Hi,

Try upgrade the undertow module to last version.

Io.undertow

Jboss.xnio

Jboss.logging

Regards,

JS

El jueves, 23 de noviembre de 2023, Olivier Masseau <omas...@gmail.com> escribió:

Hello,

We noticed some huge problems when activating https on Wildfly 23.

With some moderate load, suddenly Wildfly becomes totally unresponsive.
We have 8 cores and can see a 800% cpu usage.

We ran a JFR profiling when Wildfly was unresponsive and it seems it is related to the SSL as you can see :

Memory allocation is also insane (5 minutes profiling) :

All the I/O threads seems to be stuck in SSL hanshake.

Do you know if there is any bug in Wildfly 23 (or later versions) /undertow with the SSL handshake ?

Note : We forced supported TSL version to 1.2.

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