CPU 占用率高有可能是啥问题

[dltsgl]

tomcat 里跑了一个 java 工程，时不时会卡死，占满 CPU，日志里看不到有价值的信息。打印了一下堆栈，发现很多线程是 TIMED_WAITING 状态，但是看不懂等待什么，为啥会等待。有 V 友给个帮助吗？

"http-bio-18082-exec-455" #2916 daemon prio=5 os_prio=0 tid=0x00007f7f61880000 nid=0x4997 waiting on condition [0x00007f7b95817000]
	java.lang.Thread.State: TIMED_WAITING (parking)
		at sun.misc.Unsafe.park(Native Method)
		- parking to wait for  <0x00000005c489d518> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
		at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
		at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
		at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
		at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:86)
		at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:32)
		at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
		at java.lang.Thread.run(Thread.java:748)