Fix compaction threshold default value precision problem. (#3871)

* Fix compaction threshold precision problem.

* Fix compaction threshold precision problem.

Author: horizonzy

bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/GarbageCollectorThread.java

@@ -218,7 +218,7 @@ public void removeEntryLog(long logToRemove) {
 
         this.throttler = new AbstractLogCompactor.Throttler(conf);
         if (minorCompactionInterval > 0 && minorCompactionThreshold > 0) {
-            if (minorCompactionThreshold > 1.0f) {
+            if (minorCompactionThreshold > 1.0d) {
                 throw new IOException("Invalid minor compaction threshold "
                                     + minorCompactionThreshold);
             }
@@ -230,16 +230,16 @@ public void removeEntryLog(long logToRemove) {
         }
 
         if (isForceAllowCompaction) {
-            if (minorCompactionThreshold > 0 && minorCompactionThreshold < 1.0f) {
+            if (minorCompactionThreshold > 0 && minorCompactionThreshold < 1.0d) {
                 isForceMinorCompactionAllow = true;
             }
-            if (majorCompactionThreshold > 0 && majorCompactionThreshold < 1.0f) {
+            if (majorCompactionThreshold > 0 && majorCompactionThreshold < 1.0d) {
                 isForceMajorCompactionAllow = true;
             }
         }
 
         if (majorCompactionInterval > 0 && majorCompactionThreshold > 0) {
-            if (majorCompactionThreshold > 1.0f) {
+            if (majorCompactionThreshold > 1.0d) {
                 throw new IOException("Invalid major compaction threshold "
                                     + majorCompactionThreshold);
             }

bookkeeper-server/src/main/java/org/apache/bookkeeper/conf/ServerConfiguration.java

@@ -1676,7 +1676,7 @@ public boolean isForceAllowCompaction() {
      * @return threshold of minor compaction
      */
     public double getMinorCompactionThreshold() {
-        return getDouble(MINOR_COMPACTION_THRESHOLD, 0.2f);
+        return getDouble(MINOR_COMPACTION_THRESHOLD, 0.2d);
     }
 
     /**
@@ -1704,7 +1704,7 @@ public ServerConfiguration setMinorCompactionThreshold(double threshold) {
      * @return threshold of major compaction
      */
     public double getMajorCompactionThreshold() {
-        return getDouble(MAJOR_COMPACTION_THRESHOLD, 0.8f);
+        return getDouble(MAJOR_COMPACTION_THRESHOLD, 0.8d);
     }
 
     /**