I tried to get thread dump of the process which is enabled JFR, then I got strange thread dump like this:

```
os_prio=0 cpu=64.47ms elapsed=20.34s tid=0x00007ff7cd3ffae0 nid=59812 runnable
os_prio=0 cpu=12.76ms elapsed=20.34s tid=0x00007ff7cd3ff5a0 nid=59811 runnable
```

Thread name is lacked in the dump (and lacks of LF in addition).
I checked them with `ps -eL -o pid,tid,comm`, then I was aware they were JFR sampler threads.

```
  59789 59811 JFR CPU Sampler
  59789 59812 JFR Sampler Thr
```

So they should be shown like this:

```
"JFR Sampler Thread" os_prio=0 cpu=25.59ms elapsed=8.77s tid=0x00007f5f45626a50 nid=62979 runnable

"JFR CPU Sampler Thread" os_prio=0 cpu=4.78ms elapsed=8.78s tid=0x00007f5f45626060 nid=62978 runnable
```