[BUG] Profiling tool throws NPE when appInfo is null and unchecked

[kuhushukla]

Describe the bug

2023-10-26 16:26:57,410 DEBUG rapids.tools.cmd_driver: executing CMD:
	<CMD: java -Xmx24g -cp /home/kuhu/Downloads/dbfs_eventlog/prof_20231026212649_b53B14Ba/work_dir/rapids-4-spark-tools_2.12-23.08.2.jar:/home/kuhu/Downloads/dbfs_eventlog/prof_20231026212649_b53B14Ba/work_dir/hadoop-azure-3.3.4.jar:/home/kuhu/Downloads/dbfs_eventlog/prof_20231026212649_b53B14Ba/work_dir/spark-3.3.3-bin-hadoop3/jars/* com.nvidia.spark.rapids.tool.profiling.ProfileMain --output-directory /home/kuhu/Downloads/dbfs_eventlog/prof_20231026212649_b53B14Ba /home/kuhu/Downloads/dbfs_eventlog/eventlog/1024-202047-zgdzmm84_10_139_64_5/7353421840558998897/eventlog>[
	<STDOUT>
	| 23/10/26 16:26:56 INFO Profiler: Threadpool size is 16
	| 23/10/26 16:26:56 INFO ApplicationInfo: Parsing Event Log: file:/home/kuhu/Downloads/dbfs_eventlog/eventlog/1024-202047-zgdzmm84_10_139_64_5/7353421840558998897/eventlog
	| 23/10/26 16:26:56 WARN ToolUtils: ClassNotFoundException while parsing an event: DBCEventLoggingListenerMetadata
	| 23/10/26 16:26:56 WARN Utils: Your hostname, kuhu-Precision-7865-Tower resolves to a loopback address: 127.0.1.1; using 10.28.9.183 instead (on interface enp3s0)
	| 23/10/26 16:26:56 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
	| 23/10/26 16:26:57 INFO ApplicationInfo: Total number of events parsed: 1664 for file:/home/kuhu/Downloads/dbfs_eventlog/eventlog/1024-202047-zgdzmm84_10_139_64_5/7353421840558998897/eventlog
	| 23/10/26 16:26:57 INFO EventLogPathProcessor: ==============   (index=1)  ==============
	| 23/10/26 16:26:57 INFO Profiler: Took 886ms to process file:/home/kuhu/Downloads/dbfs_eventlog/eventlog/1024-202047-zgdzmm84_10_139_64_5/7353421840558998897/eventlog
	| 23/10/26 16:26:57 WARN Profiler: Exception occurred processing file: eventlog
	| java.lang.NullPointerException
	| 	at com.nvidia.spark.rapids.tool.profiling.CollectInformation.$anonfun$getAppInfo$1(CollectInformation.scala:39)
	| 	at scala.collection.immutable.List.map(List.scala:293)
	| 	at com.nvidia.spark.rapids.tool.profiling.CollectInformation.getAppInfo(CollectInformation.scala:37)
	| 	at com.nvidia.spark.rapids.tool.profiling.Profiler.com$nvidia$spark$rapids$tool$profiling$Profiler$$processApps(Profiler.scala:315)
	| 	at com.nvidia.spark.rapids.tool.profiling.Profiler$ProfileProcessThread$1.run(Profiler.scala:249)
	| 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	| 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	| 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	| 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	| 	at java.lang.Thread.run(Thread.java:750)
	| 23/10/26 16:26:57 INFO ToolTextFileWriter: Profile summary output location: /home/kuhu/Downloads/dbfs_eventlog/prof_20231026212649_b53B14Ba/rapids_4_spark_profile/profile.log
	| Profile Tool Progress 100% [======================================================] (0 succeeded + 1 failed + 0 N/A) / 1
	| 
	| Profile Tool execution time: 911ms
	| 	process.success.count = 0
	| 	process.failure.count = 1
	| 	process.NA.count = 0
	| 	execution.total.count = 1]; [
	<STDERR>
	| Using Spark's default log4j profile: org/apache/spark/log4j2-defaults.properties]

Steps/Code to reproduce bug
Some eventlogs do not have the appropriate event (AppStart?) to instantiate AppInfo correctly.

Expected behavior
Not throw a null pointer exception

Environment details (please complete the following information)
I tried it on Azure but it can happen on other platforms too