占用cpu高的线程的堆栈如下： Thread 1 (process 17775): #0  0x00007fa870981179 in Klass::subklass() const () from /usr/java/jdk1.8.0_45/jre/lib/amd64/server/libjvm.so #1  0x00007fa8706d15c5 in Dependencies::find_finalizable_subclass(Klass*) () from /usr/java/jd