When I wrote the blog, I find another thing I missed.
When I use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace to wrap the Runnable param in ThreadPoolExecutor#execute method. The RunnableWrapper is not instrumented because the org.apache.skywalking.apm.agent.core.plugin.match.ProtectiveShieldMatcher#matches return false. If there is some log, it will save me a lot time. The pr is https://github.com/apache/skywalking/pull/6330/files
