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Agent thread stops working while reading from random device



Agents do not respond and the thread stops working while reading from a random device.

Error Messages

"Thread-5706 (HornetQ-client-global-threads-1488549175)" #22093 daemon prio=5 os_prio=0 tid=0x00007feb94115800 nid=0x5292 runnable [0x00007feb1cde3000]
java.lang.Thread.State: RUNNABLE
at Method)
- locked <0x00000005c0490e60> (a java.lang.Object)
at com.pega.pegarules.session.internal.mgmt.base.RequestorIdGenerator$RequestorIdRandom.reseedGenerator(

Steps to Reproduce

  1. Monitor agent execution using System Management Application (SMA).
  2. Collect a thread dump to inspect the thread status.

Root Cause

A defect or configuration issue in the operating environment.

Thread dumps confirmed that agent thread hung while reading from a random device. The status of the server’s entropy was verified when the following command was run:

# cat /proc/sys/kernel/random/entropy_avail

The value returned was lower than 200. That is, the /dev/random blocking device stopped supplying values due to lack of entropy.


Make the following change to the operating environment:

When using either UNIX or LINUX environment, add '' to the Java options. For more information refer to:

Published July 23, 2018 - Updated October 8, 2020

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