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Editorial Team
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Asked: 2026-06-06T20:01:34+00:00

I installed solr-3.6 in my local windows box and it worked fine. I installed

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I installed solr-3.6 in my local windows box and it worked fine.

I installed solr-4.0 in amazon ec2 linux large instance and the cpu usage shot upto 100%. It maintained at 80-90% average cpu power.

I thought it could be because of 4.0, So I installed 3.6 in EC2 again. But again the CPU usage was 80-90% average.

With both the versions, solr works in EC2. dont know why CPU usage is so high.

In my local box java 1.7 is installed and in EC2 it is 1.6.0_24.
I have mapped solr dir to an EBS volume.

/dev/mapper/vg1-solr   8361916   1935928   6342128  24% /home/ec2-user/SOLR/solr/example/solr

Is there any known issue ?

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1 Answer

  1. Editorial Team

    We faced just this issue yesterday – the problem is because of the leap second on June 30 2012. A linux kernel component that manages sleep times isn’t updated to the correct time and this causes extremely high CPU usage for Java processes. Related question on serverfault and my fix I derived from it (for Debian):

    (issue these commands from the command line)

    export LANG="en_EN"
date -s "`date`"

/etc/init.d/ntp stop
ntpdate pool.ntp.org
/etc/init.d/ntp start

    For Red Hat derived systems, I believe you replace ntp with ntpd.

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