# Almost 90-100% CPU usage while doing nothing **URL:** \ **Category:** Elasticsearch\ **Created:** [June 4, 2013, 4:14pm UTC](https://discuss.elastic.co/t/almost-90-100-cpu-usage-while-doing-nothing/12259 "2013-06-04T16:14:04Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![shadyabhi](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@shadyabhi](https://discuss.elastic.co/u/shadyabhi)\ **Post date:** [June 4, 2013, 4:14pm UTC](https://discuss.elastic.co/t/almost-90-100-cpu-usage-while-doing-nothing/12259/1 "2013-06-04T16:14:04Z")
Hi all, I came across a issue today in a 2 node cluster where both nodes were occupying around 100% CPU usage for no reason. No indexing is happening and no search queries are being executed. Hot threads output also says the same way. [http://pb.abhijeetr.com/TbZi](http://pb.abhijeetr.com/TbZi) Stracing the ES process gives: (futex call) $sudo strace -p 3003 Process 3003 attached - interrupt to quit futex(0x7f3696d879d0, FUTEX\_WAIT, 3005, NULL ^C \ Process 3003 detached When I used "perf top" to identify, I see libjvm.so occupying 90% CPU usage. I'm using elasticsearch-0.90.0-1.noarch version. Any idea what might be happening? -- Regards, Abhijeet Rastogi (shadyabhi) > **[Abhijeet's Blog](https://blog.abhijeetr.com/)** > > I write about problems that I solve -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![mattweber](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mattweber/32/44940_2.png) [@mattweber](https://discuss.elastic.co/u/mattweber)\ **Post date:** [June 4, 2013, 4:19pm UTC](https://discuss.elastic.co/t/almost-90-100-cpu-usage-while-doing-nothing/12259/2 "2013-06-04T16:19:03Z")
What version of Java? If you are using OpenJDK, switch to the official Oracle Java 7 as there are all sorts of issues with OpenJDK. Thanks, Matt Weber On Tue, Jun 4, 2013 at 9:14 AM, Abhijeet Rastogi [abhijeet.1989@gmail.com](mailto:abhijeet.1989@gmail.com)wrote: > Hi all, > > I came across a issue today in a 2 node cluster where both nodes were > occupying around 100% CPU usage for no reason. No indexing is happening and > no search queries are being executed. > > Hot threads output also says the same way. [http://pb.abhijeetr.com/TbZi](http://pb.abhijeetr.com/TbZi) > > Stracing the ES process gives: (futex call) > > $sudo strace -p 3003 > Process 3003 attached - interrupt to quit > futex(0x7f3696d879d0, FUTEX\_WAIT, 3005, NULL > > ^C \ > Process 3003 detached > > When I used "perf top" to identify, I see libjvm.so occupying 90% CPU > usage. I'm using elasticsearch-0.90.0-1.noarch version. Any idea what might > be happening? > > -- > Regards, > Abhijeet Rastogi (shadyabhi) > [http://blog.abhijeetr.com](http://blog.abhijeetr.com) > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![shadyabhi](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@shadyabhi](https://discuss.elastic.co/u/shadyabhi)\ **Post date:** [June 4, 2013, 4:31pm UTC](https://discuss.elastic.co/t/almost-90-100-cpu-usage-while-doing-nothing/12259/3 "2013-06-04T16:31:24Z")
Hi Matt, Thanks for your reply. Sorry, I forgot to mention the java version. And yes, I'm using java-1.7.0-openjdk-1.7.0.19-2.3.9.1.el6\_4.x86\_64. I'll move to oracle Java 7 now but I'm not sure if that's the problem because this thing happens only rarely. (Last time it happened a month ago). Any other thing that might be going wrong here or a known bug or something? On Tue, Jun 4, 2013 at 9:49 PM, Matt Weber [matt.weber@gmail.com](mailto:matt.weber@gmail.com) wrote: > What version of Java? If you are using OpenJDK, switch to the official > Oracle Java 7 as there are all sorts of issues with OpenJDK. > > Thanks, > Matt Weber > > On Tue, Jun 4, 2013 at 9:14 AM, Abhijeet Rastogi [abhijeet.1989@gmail.com](mailto:abhijeet.1989@gmail.com)wrote: > > > Hi all, > > > > I came across a issue today in a 2 node cluster where both nodes were > > occupying around 100% CPU usage for no reason. No indexing is happening and > > no search queries are being executed. > > > > Hot threads output also says the same way. [http://pb.abhijeetr.com/TbZi](http://pb.abhijeetr.com/TbZi) > > > > Stracing the ES process gives: (futex call) > > > > $sudo strace -p 3003 > > Process 3003 attached - interrupt to quit > > futex(0x7f3696d879d0, FUTEX\_WAIT, 3005, NULL > > > > ^C \ > > Process 3003 detached > > > > When I used "perf top" to identify, I see libjvm.so occupying 90% CPU > > usage. I'm using elasticsearch-0.90.0-1.noarch version. Any idea what might > > be happening? > > > > -- > > Regards, > > Abhijeet Rastogi (shadyabhi) > > [http://blog.abhijeetr.com](http://blog.abhijeetr.com) > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- Regards, Abhijeet Rastogi (shadyabhi) [http://blog.abhijeetr.com](http://blog.abhijeetr.com) -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:33am UTC](https://discuss.elastic.co/t/almost-90-100-cpu-usage-while-doing-nothing/12259/4 "2017-07-06T02:33:03Z")