question Frequent Entropy issue in Support Questions

Frequent Entropy issue

Sayed016 — Tue, 21 Apr 2026 07:54:20 GMT

Hello Team,

We are seeing a frequent entropy issue in our customer cluster as shown below.

/proc/sys/kernel/random/entropy_avail returns 3754. We also installed the rng-tools in all the nodes and the service rngd is also running. After checking the document https://docs.cloudera.com/cdp-private-cloud-base/7.1.6/installation/topics/cdpdc-data-at-rest-encryption-requirements.html#pnavId1 we can see the ExecStart looks as follows

ExecStart=/sbin/rngd -f -r /dev/urandom

However, our ExecStart is the default one and looks as follows

ExecStart=/sbin/rngd -f

can you please share if updating the ExecStart will solve the issue?

Best Regards

Sayed Anisul Hoque

Re: Frequent Entropy issue

araujo — Wed, 22 Jun 2022 23:17:49 GMT

@Sayed016 ,

At the time of the alert, if you run a cat /proc/sys/kernel/random/entropy_avail on that exact host, what values are you getting?

Cheers,

André

Re: Frequent Entropy issue

Sayed016 — Thu, 23 Jun 2022 07:30:28 GMT

Hello @araujo, by the time I logged in to the node to check the entropy_avail value it became good, this issue seems to resolve fast as from the Cloudera Alert mail I can see good status within the next minute after this issue occurred. Also, from the screenshot attached you can the value was 1.