Goldengate Extract is not moving?

Hi guys,
when your extract is not collecting transactions against source table (or) it is not moving against database ? 

To find out resolution..Kindly investigate following steps
step1: check trandata is enabled for your source table?
ggsci> dblogin userid ggsuser password XXXXXggsci> info trandata schema.tablename

step2: check there is any long running transactions on your database or blocking sessions, try to skip transactions using XID 
After making sure these 2 steps
using logdump utility, kindly validate extract is collecting data and writing data on  local trail

Thank you --- Nikhil Tatineni ---