pylsp process <defunct> after started.

[lichunqiang]

when open one notebook, pylsp started, but after a monent (do nothing), the process to be defunct.

python 3.12

!jupyter --version
IPython          : 9.2.0
ipykernel        : 6.29.5
ipywidgets       : 8.1.7
jupyter_client   : 8.6.3
jupyter_core     : 5.8.1
jupyter_server   : 2.15.0
jupyterlab       : 4.4.3
nbclient         : 0.10.2
nbconvert        : 7.16.6
nbformat         : 5.10.4
notebook         : 7.4.3
qtconsole        : not installed
traitlets        : 5.14.3

jupyter_client            8.6.3
jupyter_code_server       1.2
jupyter_core              5.8.1
jupyter-events            0.12.0
jupyter-http-over-ws      0.0.8
jupyter-leaflet           0.19.2
jupyter-lsp               2.2.5
jupyter_server            2.15.0
jupyter-server-mathjax    0.2.6
jupyter_server_proxy      4.1.2
jupyter_server_terminals  0.5.3
jupyterlab                4.4.3
jupyterlab_execute_time   3.2.0
jupyterlab_git            0.51.1
jupyterlab-lsp            5.1.1
jupyterlab_pygments       0.3.0
jupyterlab_server         2.27.3
jupyterlab_widgets        3.0.15
jupyter_client            8.6.3
jupyter_code_server       1.2
jupyter_core              5.8.1
jupyter-events            0.12.0
jupyter-http-over-ws      0.0.8
jupyter-leaflet           0.19.2
jupyter-lsp               2.2.5
jupyter_server            2.15.0
jupyter-server-mathjax    0.2.6
jupyter_server_proxy      4.1.2
jupyter_server_terminals  0.5.3
jupyterlab                4.4.3
jupyterlab_execute_time   3.2.0
jupyterlab_git            0.51.1
jupyterlab-lsp            5.1.1
jupyterlab_pygments       0.3.0
jupyterlab_server         2.27.3
jupyterlab_widgets        3.0.15

use strace trick:

read(0, 0x5620cdd9ed70, 4096)           = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=7, si_uid=0} ---
+++ killed by SIGTERM +++