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.
i started the solr server using
"sudo nohup java -jar start.jar &"
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 ?