1. As shown
Solution: ps -ef | grep supervisord kill -9 pid
2.cloudera-scm-agent dead but pid file exists
Solution: ps -ef | grep cloudera-scm-agent, then kill cloudera-scm-agent.pid, and delete cloudera-scm under /opt/cloudera-manager/cm-xxx/run/cloudera-scm-agent -agent.pid file, then restart cloudera-scm-agent
Note: cloudera-scm-agent often hangs, which is related to the memory of the node being too small. When there are many tasks running on the node and the memory is relatively small, the cloudera-scm-agent service will often hang up
3. Adjust the handle
ulimit -n
Added ulimit -HSn 65535 in .bashrc