[NO ISSUE][HYR] Log thread dump at shutdown at DEBUG level

Change-Id: I29b3e01caa5b8747163fb6b2dbcee268549455c6
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3275
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-nc/src/main/java/org/apache/hyracks/control/nc/NCShutdownHook.java b/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-nc/src/main/java/org/apache/hyracks/control/nc/NCShutdownHook.java
index 9a19f8e..ffa02d6 100644
--- a/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-nc/src/main/java/org/apache/hyracks/control/nc/NCShutdownHook.java
+++ b/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-nc/src/main/java/org/apache/hyracks/control/nc/NCShutdownHook.java
@@ -45,7 +45,7 @@
                 LOGGER.info("Shutdown hook called");
             } catch (Throwable th) {//NOSONAR
             }
-            LOGGER.log(Level.INFO, () -> "Thread dump at shutdown: " + ThreadDumpUtil.takeDumpString());
+            LOGGER.log(Level.DEBUG, () -> "Thread dump at shutdown: " + ThreadDumpUtil.takeDumpString());
             nodeControllerService.stop();
         } catch (Throwable th) { // NOSONAR... This is fine since this is shutdown hook
             LOGGER.log(Level.WARN, "Exception in executing shutdown hook", th);