# All loading suddenly goes to 1 server at 8AM

**URL:** <https://discuss.elastic.co/t/all-loading-suddenly-goes-to-1-server-at-8am/138060>\
**Category:** Logstash\
**Created:** [June 30, 2018, 12:52pm UTC](https://discuss.elastic.co/t/all-loading-suddenly-goes-to-1-server-at-8am/138060 "2018-06-30T12:52:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![macymin](https://avatars.discourse-cdn.com/v4/letter/m/8e7dd6/32.png) [@macymin](https://discuss.elastic.co/u/macymin)\
**Post date:** [June 30, 2018, 12:52pm UTC](https://discuss.elastic.co/t/all-loading-suddenly-goes-to-1-server-at-8am/138060/1 "2018-06-30T12:52:00Z")

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we have 7 datanode servers, each server running 3 data nodes. it is all the way running fine.

but yesterday we experienced something wired is at 8AM, all the load from the rest of servers suddenly transferred to 1 particular server ( cpu usage, system load, indexing rate, search rate increased on all 3 nodes in that particular server and dropped for the rest of the nodes).

after we restarted the whole cluster, seems it recovers...May I know why it behaved that way? how can I find out the root cause?

btw the version we are using is 6.2.1

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 28, 2018, 12:53pm UTC](https://discuss.elastic.co/t/all-loading-suddenly-goes-to-1-server-at-8am/138060/2 "2018-07-28T12:53:12Z")

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