Spark consume 90% of my micro-processor

I dont know rest of you, but the spark client i’‘ve installed here (1.0.2) use a 90% of my CPU. It tottaly EAT my machine…what’'s the cause of these?

Spark seems to be the most FAT client

Wow. For the most part, Spark will use very little of your CPU usage. In your logs directory of Spark, could you paste your error.log and warning.log files? This will help us determine what the cause may be.

Cheers,

Derek