Java periodically hangs at futex and very low IO output

Question

Currently my application periodically blocked in IO , and the output is very low . I use some command to trace the process.

By using jstack i found that the

Answer 1

Maybe the kernel bug in futex_wait()?

You can read about it here: https://groups.google.com/forum/#!topic/mechanical-sympathy/QbmpZxp6C64