# CPU running high only on one node at time in the ES cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [February 28, 2021, 1:33am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708 "2021-02-28T01:33:46Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![sbk-elk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbk-elk/32/73414_2.png) [@sbk-elk](https://discuss.elastic.co/u/sbk-elk)\ **Post date:** [February 28, 2021, 1:33am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/1 "2021-02-28T01:33:46Z")
Not sure why only one node in the cluster has such high CPU when there is nothing happening in the cluster. ```auto top - 00:34:43 up 137 days, 17:43, 1 user, load average: 1.24, 2.14, 3.15 Tasks: 198 total, 1 running, 197 sleeping, 0 stopped, 0 zombie %Cpu(s): 27.7 us, 1.9 sy, 0.0 ni, 68.6 id, 1.7 wa, 0.0 hi, 0.1 si, 0.0 st KiB Mem : 61676952 total, 1712800 free, 34528200 used, 25435952 buff/cache KiB Swap: 0 total, 0 free, 0 used. 26000248 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8302 elastic+ 20 0 297.6g 38.9g 6.9g S **476.1** 66.1 252422:37 java 567 root 20 0 0 0 0 S 1.3 0.0 971:45.39 jbd2/dm-0-8 106 root 20 0 0 0 0 S 1.0 0.0 191:39.65 kswapd0 9 root 20 0 0 0 0 S 0.3 0.0 329:15.73 rcu_sched 1024 root 20 0 121220 15916 3264 S 0.3 0.0 364:46.79 google_osconfig 3390 root 20 0 160044 2312 1536 R 0.3 0.0 0:00.32 top 1 root 20 0 191164 3124 1652 S 0.0 0.0 1:24.79 systemd 2 root 20 0 0 0 0 S 0.0 0.0 10:48.88 kthreadd 4 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H 6 root 20 0 0 0 0 S 0.0 0.0 21:36.47 ksoftirqd/0 ``` ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [February 28, 2021, 11:33pm UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/2 "2021-02-28T23:33:34Z")
What version are you on? What is in the logs? What about hot threads? ---
**Author:** ![sbk-elk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbk-elk/32/73414_2.png) [@sbk-elk](https://discuss.elastic.co/u/sbk-elk)\ **Post date:** [March 1, 2021, 2:37am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/3 "2021-03-01T02:37:55Z")
Version -- 7.6.2 Logs: Is there a specific log you are looking for or any stack trace that you expect that may cause the CPU spike because I don't see any logs that point to any issues or are there any errors. Sometimes i see "failed to execute bulk item (index)" for a few indexes but that doesnt create any issues in the cluster or nodes(as per my understanding). Is there way i can upload the hot threads out put, it is a big log I some how cant attach it here. Thanks for your response @warkolm ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [March 1, 2021, 2:54am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/4 "2021-03-01T02:54:32Z")
Any/all logs can be relevant, even if you aren't spotting anything. > [@sbk-elk](#): > > Is there way i can upload the hot threads out put, it is a big log I some how cant attach it here. Use gist/pastebin/etc. ---
**Author:** ![sbk-elk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbk-elk/32/73414_2.png) [@sbk-elk](https://discuss.elastic.co/u/sbk-elk)\ **Post date:** [March 1, 2021, 5:02am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/6 "2021-03-01T05:02:18Z")
> ---
**Author:** ![sbk-elk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbk-elk/32/73414_2.png) [@sbk-elk](https://discuss.elastic.co/u/sbk-elk)\ **Post date:** [March 1, 2021, 5:03am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/7 "2021-03-01T05:03:53Z")
@warkolm I have uploaded the cluster details as well in the comments fyi. Please let me know if you need any further details that can help further check on it. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 29, 2021, 5:04am UTC](https://discuss.elastic.co/t/cpu-running-high-only-on-one-node-at-time-in-the-es-cluster/265708/8 "2021-03-29T05:04:39Z")
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