diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
index e450380..3403afc 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
@@ -23,6 +23,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
@@ -155,7 +156,7 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         if (isRightOuter) {
             INullWriter[] nullWriters = new INullWriter[nullWriterFactories.length];
             for (int i = 0; i < nullWriters.length; i++)
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
index 90c0c84..5156dbf 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
@@ -73,7 +73,8 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
             IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
-            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity) {
+            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity)
+            throws HyracksDataException {
         treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.lowKeyInclusive = lowKeyInclusive;
@@ -220,4 +221,4 @@
         writers[index] = writer;
     }
 
-}
\ No newline at end of file
+}
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
index b817987..4ca7533 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
@@ -84,7 +84,7 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, INullWriter[] nullWriter, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory,
-            IRecordDescriptorFactory inputRdFactory, int outputArity) {
+            IRecordDescriptorFactory inputRdFactory, int outputArity) throws HyracksDataException {
         inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
         treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
index bdf90e4..3cebfb8 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
@@ -76,7 +76,7 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory,
-            IRecordDescriptorFactory inputRdFactory, int outputArity) {
+            IRecordDescriptorFactory inputRdFactory, int outputArity) throws HyracksDataException {
         treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.isForward = isForward;
@@ -251,4 +251,4 @@
     public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
         writers[index] = writer;
     }
-}
\ No newline at end of file
+}
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorDescriptor.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorDescriptor.java
index f651d68..31496a9 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorDescriptor.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorDescriptor.java
@@ -21,6 +21,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
@@ -83,9 +84,9 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         return new TreeSearchFunctionUpdateOperatorNodePushable(this, ctx, partition, recordDescProvider, isForward,
                 lowKeyFields, highKeyFields, lowKeyInclusive, highKeyInclusive, functionFactory, preHookFactory,
                 postHookFactory, inputRdFactory, outputArity);
     }
-}
\ No newline at end of file
+}
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorNodePushable.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorNodePushable.java
index f6193bb..bd85e3e 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorNodePushable.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorNodePushable.java
@@ -82,7 +82,8 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
             IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
-            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity) {
+            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity)
+            throws HyracksDataException {
         treeIndexHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.isForward = isForward;
@@ -232,4 +233,4 @@
         writers[index] = writer;
     }
 
-}
\ No newline at end of file
+}
diff --git a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
index 1ff3959..b2be366 100644
--- a/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
+++ b/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
@@ -44,7 +44,7 @@
     private final int frameSize;
     private IFrameTupleAccessor fta;
 
-    public UpdateBuffer(int numPages, IHyracksTaskContext ctx, int fieldCount) {
+    public UpdateBuffer(int numPages, IHyracksTaskContext ctx, int fieldCount) throws HyracksDataException {
         this.appender = new FrameTupleAppender(ctx.getFrameSize());
         ByteBuffer buffer = ctx.allocateFrame();
         this.buffers.add(buffer);
@@ -55,7 +55,7 @@
         this.fta = new UpdateBufferTupleAccessor(frameSize, fieldCount);
     }
 
-    public UpdateBuffer(IHyracksTaskContext ctx, int fieldCount) {
+    public UpdateBuffer(IHyracksTaskContext ctx, int fieldCount) throws HyracksDataException {
         //by default, the update buffer has 1000 pages
         this(1000, ctx, fieldCount);
     }
@@ -104,7 +104,7 @@
         appender.reset(buffer, true);
     }
 
-    private void allocate(int index) {
+    private void allocate(int index) throws HyracksDataException {
         if (index >= buffers.size()) {
             buffers.add(ctx.allocateFrame());
         }
diff --git a/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java b/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
index 86da3bf..ca8f190 100644
--- a/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
+++ b/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
@@ -38,7 +38,8 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions)
+            throws HyracksDataException {
         return new AbstractUnaryInputUnaryOutputOperatorNodePushable() {
             private ByteBuffer frame = ctx.allocateFrame();
             private boolean complete = false;