[Java SE] OperatingSystemMXBean.getSystemCpuLoad() Method Returns Incorrect Value in Containers (Doc ID 2860378.1)

Last updated on MAY 06, 2022

Applies to:

Symptoms

For applications that implement the Oracle JDK OperatingSystemMXBean Interface in containers, the OperatingSystemMXBean.getSystemCpuLoad() method may return an incorrect value.  When the CPU load reaches 100%, the OperatingSystemMXBean.getSystemCpuLoad() method returns a value of 1 to indicate the CPU load is 100%.  However, the OperatingSystemMXBean.getSystemCpuLoad()continues to return a value of 1 throughout the rest of the runtime, even though the actual CPU load has decreased. 

To reproduce the issue, use the test case from JDK-8265836 with:

• Oracle Java SE 8 Update 321 b33 or older release; or
• Oracle Java SE 11.0.13 or older release

Cause

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