sohami commented on a change in pull request #1536: DRILL-6039: Fixed 
drillbit.sh script to do graceful shutdown
URL: https://github.com/apache/drill/pull/1536#discussion_r235505271
 
 

 ##########
 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/server/Drillbit.java
 ##########
 @@ -335,6 +351,50 @@ private void javaPropertiesToSystemOptions() {
     }
   }
 
+
+  // Polls for graceful file to check if graceful shutdown is triggered from 
the script.
+  private static class PollShutdownThread extends Thread {
+
+    private final Drillbit drillbit;
+    private final StackTrace stackTrace;
+
+    public PollShutdownThread(final Drillbit drillbit, final StackTrace 
stackTrace) {
+      this.drillbit = drillbit;
+      this.stackTrace = stackTrace;
+    }
+
+    @Override
+    public void run () {
+      try {
+        pollShutdown(drillbit);
+      } catch (Exception e) {
+        throw new RuntimeException("Caught exception while polling for 
shutdown\n" + stackTrace, e);
+      }
 
 Review comment:
   I think you have to catch `InterruptedException` and consume it after 
logging rather than throwing `RuntimeException` for it. Since when 
`Drillbit.close` is called from another path it will interrupt this thread and 
we should not throw `RuntimeException` in that case.

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