@Sreelakshmi Lingala Although it depends on the requirements of the project or implementation the following link provides details of log size management https://community.hortonworks.com/articles/8882/how-to-control-size-of-log-files-for-various-hdp-c.html Also OS level tools would be important from managing disk space compressing the log files. Also check the level of logging (WARN,DEBUG ....) enabled in the various log components in HDP which would avoid unexpected results. Along with this one needs to make sure Ambari Logs usually /var/log also does not spiral out of control. ... View more

@Prakhar Agrawal One of the reason could be the customprocessor is not stopped; your custom code is blocking and does not react to interrupts and hence you are not able to restart. One of the solution could be restart of Apache Nifi ... View more