I was reading Simple Shortest Paths Computation class. Here : https://apache.googlesource.com/giraph/+/3d4f31343c3686435696e75ce88a75c9bffb024e/giraph-examples/src/main/java/org/apache/giraph/examples/SimpleShortestPathsComputation.java
I could not get the use of creating Log in this class . The program runs fine even if I comment all the log related stuff.
Logs don't affect on the programs output but they are used to make debugging and analyzing the program easier. For the full list of why we need logs read this: https://softwareengineering.stackexchange.com/questions/37294/logging-why-and-what