SevenBlue2018 opened a new issue #3182: Skywalking CPU 100% URL: https://github.com/apache/skywalking/issues/3182 Please answer these questions before submitting your issue. - Why do you submit this issue? - [ 1 ] Question or discussion - [ ] Bug - [ ] Requirement - [ ] Feature or performance improvement ___ ### Question - What do you want to know? skywalking后台CPU%，部署的单机，存储使用ES，也是单机。ES的CPU、内存以及状态都正常。 本来想执行jstack查看skywalking进程的线程状态，但是执行后报错： `[root@iZbp1d40aso0xvdm5qgsawZ ~]# jstack 12145 | more 12145: Unable to open socket file: target process not responding or HotSpot VM not loaded The -F option can be used when the target process is not responding` skywalking后台的日志一直打印： `2019-07-29 12:50:02,964 - org.elasticsearch.client.RestClient - 65 [I/O dispatcher 1] WARN [] - request [POST http://172.16.4.52:9200/register_lock/type/16/_update?refresh=true&version=16117&timeout=1m] returned 1 warnings: [299 Elasticsearch-6.7.2-56c6e48 "Usage of internal versioning for optimistic concurrency control is deprecated and will be removed. Please use the `if_seq_no` and `if_primary_term` parameters instead. (request for index [register_lock], type [type], id [16])"] ` 运行环境： jdk版本：1.8.0_211-b12 Skywalking版本：6.2.0
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