[BAEL-3600] small fixes

netflix-modules/mantis/src/main/java/com/baeldung/netflix/mantis/MantisApplication.java

@@ -1,7 +1,6 @@
 package com.baeldung.netflix.mantis;
 
 import com.baeldung.netflix.mantis.job.LogAggregationJob;
-import com.baeldung.netflix.mantis.job.LogCollectingJob;
 import io.mantisrx.runtime.executor.LocalJobExecutorNetworked;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.CommandLineRunner;

netflix-modules/mantis/src/main/java/com/baeldung/netflix/mantis/job/LogCollectingJob.java

@@ -9,7 +9,6 @@ import io.mantisrx.runtime.MantisJob;
 import io.mantisrx.runtime.MantisJobProvider;
 import io.mantisrx.runtime.Metadata;
 import io.mantisrx.runtime.ScalarToScalar;
-import io.mantisrx.runtime.sink.Sinks;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -21,7 +20,6 @@ public class LogCollectingJob extends MantisJobProvider<LogEvent> {
         return MantisJob
           .source(new RandomLogSource())
           .stage(new TransformLogStage(), new ScalarToScalar.Config<>())
-//          .sink(Sinks.eagerSubscribe(Sinks.sse(LogEvent::toJsonString)))
           .sink(new LogSink())
           .metadata(new Metadata.Builder().build())
           .create();

netflix-modules/mantis/src/main/java/com/baeldung/netflix/mantis/model/LogAggregate.java

@@ -19,7 +19,6 @@ public class LogAggregate implements JsonType {
         try {
             return mapper.writeValueAsString(this);
         } catch (JsonProcessingException e) {
-            e.printStackTrace();
             return null;
         }
     }

netflix-modules/mantis/src/main/java/com/baeldung/netflix/mantis/model/LogEvent.java

@@ -28,7 +28,6 @@ public class LogEvent implements JsonType {
         try {
             return mapper.writeValueAsString(this);
         } catch (JsonProcessingException e) {
-            e.printStackTrace();
             return null;
         }
     }