Initial clean up

Author: Kunal Khatua

exec/java-exec/src/main/java/org/apache/drill/exec/server/Drillbit.java

@@ -240,7 +240,7 @@ public void run() throws Exception {
     Runtime.getRuntime().addShutdownHook(shutdownHook);
     gracefulShutdownThread.start();
 
-    // Launch an archiving job that is # files and time bound
+    // Launch an archiving job that is limited by # files (so as to be timebound)
     PersistentStore<QueryProfile> queryProfileStore = drillbitContext.getProfileStoreContext().getCompletedProfileStore();
     if (queryProfileStore instanceof LocalPersistentStore
         && context.getConfig().getBoolean(ExecConstants.PROFILES_STORE_INDEX_ENABLED)) {

exec/java-exec/src/main/java/org/apache/drill/exec/server/profile/ProfileIndexer.java

@@ -113,7 +113,6 @@ public ProfileIndexer(ClusterCoordinator coord, DrillbitContext context) throws
     this.sysFileSuffixFilter = new DrillSysFilePathFilter();
     String indexPathPattern = drillConfig.getString(ExecConstants.PROFILES_STORE_INDEX_FORMAT);
     this.indexedPathFormat = new SimpleDateFormat(indexPathPattern);
-    logger.info("Organizing any existing unindexed profiles");
   }
 
 
@@ -211,8 +210,7 @@ private long getProfileStart(Path srcPath) {
       QueryProfile profile = pStoreConfig.getSerializer().deserialize(IOUtils.toByteArray(is));
       return profile.getStart();
     } catch (IOException e) {
-      logger.info("Unable to deserialize {}\n---{}====", srcPath, e.getMessage()); //Illegal character ((CTRL-CHAR, code 0)): only regular white space (\r, \n, \t) is allowed between tokens       at [Source: [B@f76ca5b; line: 1, column: 65538]
-      logger.info("deserialization RCA==> \n {}", ExceptionUtils.getRootCause(e));
+      logger.error("Unable to deserialize {}\n{}", srcPath, e.getMessage());
     }
     return Long.MIN_VALUE;
   }

exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/profile/ProfileResources.java

@@ -37,7 +37,6 @@
 import javax.ws.rs.core.UriInfo;
 import javax.xml.bind.annotation.XmlRootElement;
 
-
 import org.apache.drill.common.config.DrillConfig;
 import org.apache.drill.common.exceptions.DrillRuntimeException;
 import org.apache.drill.common.exceptions.UserException;
@@ -74,7 +73,6 @@ public class ProfileResources {
   public static class ProfileInfo implements Comparable<ProfileInfo> {
     private static final int QUERY_SNIPPET_MAX_CHAR = 150;
     private static final int QUERY_SNIPPET_MAX_LINES = 8;
-
     public static final SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
 
     private final String queryId;
@@ -379,7 +377,7 @@ public Viewable getProfile(@PathParam("queryid") String queryId){
       ProfileWrapper wrapper = new ProfileWrapper(getQueryProfile(queryId), work.getContext().getConfig());
       return ViewableWithPermissions.create(authEnabled.get(), "/rest/profile/profile.ftl", sc, wrapper);
     } catch (Exception | Error e) {
-      logger.error("Exception was thrown when fetching profile {} :\n{}\n====\n", queryId, e);
+      logger.error("Exception was thrown when fetching profile {} :\n{}", queryId, e);
       return ViewableWithPermissions.create(authEnabled.get(), "/rest/errorMessage.ftl", sc, e);
     }
   }