add_intellij_debug_statements (#1760)

Author: coderfender

docs/source/contributor-guide/img.png

@@ -65,7 +65,7 @@ ENABLE_COMET=true build/sbt "hive/testOnly * -- -l org.apache.spark.tags.Extende
 ENABLE_COMET=true build/sbt "hive/testOnly * -- -n org.apache.spark.tags.ExtendedHiveTest"
 ENABLE_COMET=true build/sbt "hive/testOnly * -- -n org.apache.spark.tags.SlowHiveTest"
 ```
-#### Steps to run individual test suites
+#### Steps to run individual test suites through SBT
 1. Open SBT with Comet enabled
 ```sbt
 ENABLE_COMET=true sbt -Dspark.test.includeSlowTests=true 
@@ -74,6 +74,14 @@ ENABLE_COMET=true sbt -Dspark.test.includeSlowTests=true
 ```sbt
  sql/testOnly  org.apache.spark.sql.DynamicPartitionPruningV1SuiteAEOn -- -z "SPARK-35568"
 ```
+#### Steps to run individual test suites in IntelliJ IDE
+1. Add below configuration in VM Options for your test case (apache-spark repository)
+```sbt
+-Dspark.comet.enabled=true -Dspark.comet.debug.enabled=true -Dspark.plugins=org.apache.spark.CometPlugin -DXmx4096m -Dspark.executor.heartbeatInterval=20000 -Dspark.network.timeout=10000 --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED
+```
+2. Set `ENABLE_COMET=true` in environment variables
+![img.png](img.png)
+3. After the above tests are configured, spark tests can be run with debugging enabled on spark/comet code. Note that Comet is added as a dependency and the classes are readonly while debugging from Spark. Any new changes to Comet are to be built and deployed locally through the command (`PROFILES="-Pspark-3.4" make release`)
 
 ## Creating a diff file for a new Spark version