diff --git a/src/main/java/org/apache/cassandra/db/compaction/CompactionManager.java b/src/main/java/org/apache/cassandra/db/compaction/CompactionManager.java
index 55c3a60..8733fb5 100644
--- a/src/main/java/org/apache/cassandra/db/compaction/CompactionManager.java
+++ b/src/main/java/org/apache/cassandra/db/compaction/CompactionManager.java
@@ -137,7 +137,7 @@ public class CompactionManager implements CompactionManagerMBean {
     @Deprecated
     public long getTotalBytesCompacted() {
         log(" getTotalBytesCompacted()");
-        return c.getLongValue("");
+        return metrics.bytesCompacted.count();
     }
 
     /**
@@ -187,7 +187,11 @@ public class CompactionManager implements CompactionManagerMBean {
      */
     public int getCoreCompactorThreads() {
         log(" getCoreCompactorThreads()");
-        return c.getIntValue("");
+        /**
+         * Core size pool is meaningless, we still wants to return a valid reponse,
+         * just in case someone will try to call this method.
+         */
+        return 1;
     }
 
     /**
@@ -205,7 +209,11 @@ public class CompactionManager implements CompactionManagerMBean {
      */
     public int getMaximumCompactorThreads() {
         log(" getMaximumCompactorThreads()");
-        return c.getIntValue("");
+        /**
+         * Core size pool is meaningless, we still wants to return a valid reponse,
+         * just in case someone will try to call this method.
+         */
+        return 1;
     }
 
     /**
@@ -223,7 +231,11 @@ public class CompactionManager implements CompactionManagerMBean {
      */
     public int getCoreValidationThreads() {
         log(" getCoreValidationThreads()");
-        return c.getIntValue("");
+        /**
+         * Core validation size pool is meaningless, we still wants to return a valid reponse,
+         * just in case someone will try to call this method.
+         */
+        return 1;
     }
 
     /**
@@ -241,7 +253,11 @@ public class CompactionManager implements CompactionManagerMBean {
      */
     public int getMaximumValidatorThreads() {
         log(" getMaximumValidatorThreads()");
-        return c.getIntValue("");
+        /**
+         * Core validation size pool is meaningless, we still wants to return a valid reponse,
+         * just in case someone will try to call this method.
+         */
+        return 1;
     }
 
     /**
diff --git a/src/main/java/org/apache/cassandra/net/MessagingService.java b/src/main/java/org/apache/cassandra/net/MessagingService.java
index d8d4b1f..565819a 100644
--- a/src/main/java/org/apache/cassandra/net/MessagingService.java
+++ b/src/main/java/org/apache/cassandra/net/MessagingService.java
@@ -31,6 +31,8 @@ import javax.json.JsonArray;
 import javax.json.JsonObject;
 import javax.management.MBeanServer;
 import javax.management.ObjectName;
+import javax.ws.rs.core.MultivaluedHashMap;
+import javax.ws.rs.core.MultivaluedMap;
 
 import org.apache.cassandra.metrics.DroppedMessageMetrics;
 
@@ -240,7 +242,9 @@ public final class MessagingService implements MessagingServiceMBean {
 
     public int getVersion(String address) throws UnknownHostException {
         log(" getVersion(String address) throws UnknownHostException");
-        return c.getIntValue("");
+        MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
+        queryParams.add("addr", address);
+        return c.getIntValue("/messaging_service/version", queryParams);
     }
 
 }
diff --git a/src/main/java/org/apache/cassandra/service/StorageService.java b/src/main/java/org/apache/cassandra/service/StorageService.java
index effff96..9b5b822 100644
--- a/src/main/java/org/apache/cassandra/service/StorageService.java
+++ b/src/main/java/org/apache/cassandra/service/StorageService.java
@@ -1446,8 +1446,7 @@ public class StorageService extends NotificationBroadcasterSupport
 
     @Override
     public double getTracingProbability() {
-        // TODO Auto-generated method stub
         log(" getTracingProbability()");
-        return c.getDoubleValue("");
+        return c.getDoubleValue("/storage_service/trace_probability");
     }
 }