[KAFKA-8881] Measure thread running time precisely

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4.0
• Labels: needs-discussion
• Assignee: Unassigned
• Reporter: huxihx
• Created: 06/Sep/19 07:28
• Updated: 13/Jan/20 01:34

Description

Currently, the code uses `System.currentTimeMillis()` to measure timeout extensively. However, many situations trigger the thread suspend such as gc and context switch. In such cases, the timeout value we specify is not strictly honored. I believe many of flaky tests failed with timed-out are a result of this. Maybe we should use ThreadMXBean#getCurrentThreadCpuTime to precisely measure the thread running time.