init.lua:726: phase_func(): failed to acquire the lock: timeoutrequest help: #138help request:

### Description

[](https://user-images.githubusercontent.com/13093730/164147546-b975f4b5-6342-4520-a04d-2dc06923178c.png)Issue description
java-plugin demofilter,cannot exec success.

2022/04/20 03:54:56 [error] 44#44: *12875 [lua] init.lua:726: phase_func(): failed to acquire the lock: timeout, client: 10.233.64.0, server: _, request: "GET /test HTTP/1.1", host: "10.27.163.82:8898"
2022/04/20 03:54:56 [warn] 44#44: *12875 [lua] plugin.lua:750: run_plugin(): ext-plugin-pre-req exits with http status code 503, client: 10.233.64.0, server: _, request: "GET /test HTTP/1.1", host: "10.27.163.82:8898"

Environment
image

配置stream
curl "http://10.27.163.82:8897/apisix/admin/upstreams/1" -H "X-API-KEY: edd1c9f034335f136f87ad84b625c8f1" -X PUT -d '{
"type": "roundrobin","nodes": {"172.24.164.113:8099": 1}}'

#配置路由
curl "http://10.27.163.82:8897/apisix/admin/routes/1" -H "X-API-KEY: edd1c9f034335f136f87ad84b625c8f1" -X PUT -d '
{
"uri": "/test",
"upstream_id": "1",
"plugins": {
"ext-plugin-pre-req": {
"conf": [
{
"name": "DemoFilter",
"value": "config"
}
]
}
}
}'

### Environment

- APISIX version (run `apisix version`):2.13

- Operating system (run `uname -a`):
Linux hbbj-infoflowtesting-k8s-1.bcc-bjdd.baidu.com 4.17.11-1.el7.elrepo.x86_64 apache/apisix#1 SMP Sat Jul 28 09:33:09 EDT 2018 x86_64 x86_64 x86_64 GNU/Linux

- OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
nginx version: nginx/1.12.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)
built with OpenSSL 1.0.2k-fips 26 Jan 2017

- etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`):
v3
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
0.2.0
- LuaRocks version, for installation issues (run `luarocks --version`):