diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java
index c4f43b9..854d34e 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java
@@ -5,7 +5,7 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IIndexLifecycleManager {
-    public IIndex getIndex(long resourceID);
+    public IIndex getIndex(long resourceID) throws HyracksDataException;
 
     public void register(long resourceID, IIndex index) throws HyracksDataException;
 
@@ -13,7 +13,7 @@
 
     public void open(long resourceID) throws HyracksDataException;
 
-    public void close(long resourceID);
+    public void close(long resourceID) throws HyracksDataException;
 
     public List<IIndex> getOpenIndexes();
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
index db34e28..1ad7f5d 100644
--- a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
@@ -77,16 +77,12 @@
         if (openCount == 0) {
             vbc.close();
         }
-        System.out.println("Calling close with openCount = " + openCount);
-        Thread.dumpStack();
     }
 
     @Override
     public synchronized void open() {
         ++openCount;
         vbc.open();
-        System.out.println("Calling open with openCount = " + openCount);
-        Thread.dumpStack();
     }
 
     @Override
@@ -103,5 +99,4 @@
     public IFileMapManager getFileMapProvider() {
         return vbc.getFileMapProvider();
     }
-
 }