>From Michael Blow <[email protected]>:

Michael Blow has submitted this change. ( 
https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/19883 )

Change subject: [NO ISSUE][STO][MISC] Fixes to handling of interrupted actions
......................................................................

[NO ISSUE][STO][MISC] Fixes to handling of interrupted actions

- Avoid double unpin on interrupt during unwind of pipeline by
  clearing the pinned page after successful unpin.
- Propagate the interrupted exception when feasible when InvokeUtil
  helpers are used- previously these helpers would only set the
  interrupted flag on the current thread which can mask interrupted
  actions.

(cherry picked from commit 65b6a27d1)

Ext-ref: MB-67050
Change-Id: I2f8c64fa76beecbebcb40cf2a86866189cb1c55a
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/19883
Tested-by: Jenkins <[email protected]>
Reviewed-by: Ali Alsuliman <[email protected]>
Reviewed-by: Michael Blow <[email protected]>
---
M 
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/StorageFileAccessTest.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/IBufferCache.java
M 
asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/GlobalVirtualBufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreeRangeSearchCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/VirtualBufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/DebugBufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/ondisk/fixedsize/FixedSizeElementInvertedListScanCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreePointSearchCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/AbstractOnDiskInvertedListCursor.java
M 
hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/BufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestVirtualBufferCache.java
M 
hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/InvokeUtil.java
M 
hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTree.java
17 files changed, 209 insertions(+), 56 deletions(-)

Approvals:
  Michael Blow: Looks good to me, but someone else must approve
  Ali Alsuliman: Looks good to me, approved
  Jenkins: Verified




diff --git 
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/GlobalVirtualBufferCache.java
 
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/GlobalVirtualBufferCache.java
index 1565730..f877143 100644
--- 
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/GlobalVirtualBufferCache.java
+++ 
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/GlobalVirtualBufferCache.java
@@ -313,7 +313,7 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
         vbc.unpin(page);
     }

diff --git 
a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/InvokeUtil.java
 
b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/InvokeUtil.java
index d331ab2..a680ee1 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/InvokeUtil.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/InvokeUtil.java
@@ -35,6 +35,7 @@
 import org.apache.hyracks.util.InterruptibleSupplier;
 import org.apache.hyracks.util.Span;
 import org.apache.hyracks.util.ThrowingAction;
+import org.apache.hyracks.util.ThrowingConsumer;
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -53,7 +54,12 @@
     /**
      * Executes the passed interruptible, retrying if the operation is 
interrupted. Once the interruptible
      * completes, the current thread will be re-interrupted, if the original 
operation was interrupted.
+     *
+     * @deprecated this method does not throw an exception when the action is 
interrupted, or when the thread
+     *             was interrupted prior to calling this method. This can lead 
to confusing behavior, if the caller
+     *             does not check for interrupted thread state after calling 
this method.
      */
+    @Deprecated
     public static void doUninterruptibly(InterruptibleAction interruptible) {
         boolean interrupted = Thread.interrupted();
         try {
@@ -211,10 +217,11 @@
         }
     }

-    @SuppressWarnings({ "squid:S1181", "squid:S1193", "ConstantConditions" }) 
// catching Throwable, instanceofs
-    public static void tryWithCleanups(ThrowingAction action, 
ThrowingAction... cleanups) throws Exception {
+    @SuppressWarnings({ "squid:S1181", "squid:S1193", "ConstantConditions", 
"UnreachableCode" })
+    // catching Throwable, instanceofs, false-positive unreachable code
+    public static void tryWithCleanupsAsHyracks(ThrowingAction action, 
ThrowingAction... cleanups)
+            throws HyracksDataException {
         Throwable savedT = null;
-        boolean suppressedInterrupted = false;
         try {
             action.run();
         } catch (Throwable t) {
@@ -224,6 +231,137 @@
                 try {
                     cleanup.run();
                 } catch (Throwable t) {
+                    savedT = ExceptionUtils.suppress(savedT, t);
+                }
+            }
+        }
+        if (Thread.interrupted()) {
+            savedT = ExceptionUtils.suppress(savedT, new 
InterruptedException());
+        }
+        if (savedT == null) {
+            return;
+        }
+        throw HyracksDataException.create(savedT);
+    }
+
+    @SuppressWarnings({ "squid:S1181", "squid:S1193", "ConstantConditions", 
"UnreachableCode" })
+    // catching Throwable, instanceofs, false-positive unreachable code
+    public static void tryWithCleanups(ThrowingAction action, 
ThrowingAction... cleanups) throws Exception {
+        Throwable savedT = null;
+        try {
+            action.run();
+        } catch (Throwable t) {
+            savedT = t;
+        } finally {
+            for (ThrowingAction cleanup : cleanups) {
+                try {
+                    cleanup.run();
+                } catch (Throwable t) {
+                    savedT = ExceptionUtils.suppress(savedT, t);
+                }
+            }
+        }
+        if (Thread.interrupted()) {
+            savedT = ExceptionUtils.suppress(savedT, new 
InterruptedException());
+        }
+        if (savedT == null) {
+            return;
+        }
+        if (savedT instanceof Error) {
+            throw (Error) savedT;
+        } else if (savedT instanceof Exception) {
+            throw (Exception) savedT;
+        } else {
+            throw HyracksDataException.create(savedT);
+        }
+    }
+
+    /**
+     * Runs the supplied action, and any specified cleanups. Any pending 
interruption will be cleared prior
+     * to running the action and all cleanups. An error will be logged if the 
action and/or any of the cleanups
+     * are themselves interrupted. Finally, if any action or cleanup was 
interrupted, or if the there was an
+     * interrupt cleared as part of running any of these activities, either an 
InterruptedException will be returned
+     * if the action & cleanups all ran without exception, or an 
InterruptedException will be suppressed into the
+     * exception if the action or any of the cleanups threw an exception. In 
the case where InterruptedException is
+     * suppressed, the current thread will be interrupted.
+     *
+     * @param action the action to run
+     * @param cleanups the cleanups to run after the action
+     * @return Exception if the action throws an exception or the action or 
any of the cleanups are interrupted, or if
+     * the current thread was interrupted before running the action or any of 
the cleanups.
+     */
+    @SuppressWarnings({ "squid:S1181", "squid:S1193", "ConstantConditions", 
"UnreachableCode" })
+    // catching Throwable, instanceofs, false-positive unreachable code
+    public static Exception tryUninterruptibleWithCleanups(Exception root, 
ThrowingAction action,
+            ThrowingAction... cleanups) {
+        try {
+            tryUninterruptibleWithCleanups(action, cleanups);
+        } catch (Exception e) {
+            root = ExceptionUtils.suppress(root, e);
+        }
+        return root;
+    }
+
+    /**
+     * Runs the supplied action, and any specified cleanups. Any pending 
interruption will be cleared prior
+     * to running the action and all cleanups. An error will be logged if the 
action and/or any of the cleanups
+     * are themselves interrupted. Finally, if any action or cleanup was 
interrupted, or if the there was an
+     * interrupt cleared as part of running any of these activities, either an 
InterruptedException will be thrown
+     * if the action & cleanups all ran without exception, or an 
InterruptedException will be suppressed into the
+     * exception if the action or any of the cleanups threw an exception. In 
the case where InterruptedException is
+     * suppressed, the current thread will be interrupted.
+     *
+     * @param action the action to run
+     * @param cleanups the cleanups to run after the action
+     * @throws Exception if the action throws an exception or the action or 
any of the cleanups are interrupted.
+     */
+    @SuppressWarnings({ "squid:S1181", "squid:S1193", "ConstantConditions", 
"UnreachableCode" })
+    // catching Throwable, instanceofs, false-positive unreachable code
+    public static void tryUninterruptibleWithCleanups(ThrowingAction action, 
ThrowingAction... cleanups)
+            throws Exception {
+        Throwable savedT = null;
+        try {
+            runUninterruptible(action);
+        } catch (Throwable t) {
+            savedT = t;
+        } finally {
+            for (ThrowingAction cleanup : cleanups) {
+                try {
+                    runUninterruptible(cleanup);
+                } catch (Throwable t) {
+                    savedT = ExceptionUtils.suppress(savedT, t);
+                }
+            }
+        }
+        if (Thread.interrupted()) {
+            savedT = ExceptionUtils.suppress(savedT, new 
InterruptedException());
+        }
+        if (savedT == null) {
+            return;
+        }
+        if (savedT instanceof Error) {
+            throw (Error) savedT;
+        } else if (savedT instanceof Exception) {
+            throw (Exception) savedT;
+        } else {
+            throw HyracksDataException.create(savedT);
+        }
+    }
+
+    // catching Throwable, instanceofs, false-positive unreachable code
+    public static void tryWithCleanups(ThrowingAction action, 
ThrowingConsumer<Throwable>... cleanups)
+            throws Exception {
+        Throwable savedT = null;
+        boolean suppressedInterrupted = false;
+        try {
+            action.run();
+        } catch (Throwable t) {
+            savedT = t;
+        } finally {
+            for (ThrowingConsumer cleanup : cleanups) {
+                try {
+                    cleanup.process(savedT);
+                } catch (Throwable t) {
                     if (savedT != null) {
                         savedT.addSuppressed(t);
                         suppressedInterrupted = suppressedInterrupted || t 
instanceof InterruptedException;
@@ -329,16 +467,12 @@
         boolean interrupted = Thread.interrupted();
         try {
             action.run();
-            if (Thread.interrupted()) {
+            if (interrupted || Thread.interrupted()) {
                 throw new InterruptedException();
             }
         } catch (InterruptedException e) {
             LOGGER.error("uninterruptible action {} was interrupted!", action, 
e);
-            interrupted = true;
-        } finally {
-            if (interrupted) {
-                Thread.currentThread().interrupt();
-            }
+            throw e;
         }
     }

diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
index 71df593..39e2a38 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
@@ -108,13 +108,14 @@
         stopTupleIndex = getHighKeyIndex();
     }

-    private void releasePage() throws HyracksDataException {
+    private void releasePage() {
         if (exclusiveLatchNodes) {
             page.releaseWriteLatch(isPageDirty);
         } else {
             page.releaseReadLatch();
         }
         bufferCache.unpin(page);
+        page = null;
     }

     private void fetchNextLeafPage(int nextLeafPage) throws 
HyracksDataException {
@@ -218,7 +219,6 @@
         }
         tupleBuilder.reset();
         tupleIndex = 0;
-        page = null;
         isPageDirty = false;
         pred = null;
         count = -1;
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
index cf3727a..99e2d0b 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
@@ -46,7 +46,6 @@
     protected final IBTreeLeafFrame frame;
     protected final ITreeIndexTupleReference frameTuple;
     protected final boolean exclusiveLatchNodes;
-    protected boolean isPageDirty;

     protected IBufferCache bufferCache = null;
     protected int fileId = -1;
@@ -118,7 +117,6 @@
                 releasePage();
             }
             page = nextLeaf;
-            isPageDirty = false;
             frame.setPage(page);
             pageId = nextLeafPage;
             nextLeafPage = frame.getNextLeaf();
@@ -159,8 +157,6 @@
                 reconciliationTuple.reset(tupleBuilder.getFieldEndOffsets(), 
tupleBuilder.getByteArray());

                 releasePage();
-                page = null;
-                isPageDirty = false;

                 // reconcile
                 searchCb.reconcile(reconciliationTuple);
@@ -236,7 +232,6 @@
         originalKeyCmp = initialState.getOriginalKeyComparator();
         pageId = ((BTreeCursorInitialState) initialState).getPageId();
         page = initialState.getPage();
-        isPageDirty = false;
         frame.setPage(page);

         pred = (RangePredicate) searchPred;
@@ -267,7 +262,7 @@
         stopTupleIndex = getHighKeyIndex();
     }

-    protected void resetBeforeOpen() throws HyracksDataException {
+    protected void resetBeforeOpen() {
         releasePage();
     }

@@ -278,8 +273,6 @@
         }

         tupleIndex = 0;
-        page = null;
-        isPageDirty = false;
         pred = null;
     }

@@ -298,13 +291,17 @@
         return exclusiveLatchNodes;
     }

-    protected void releasePage() throws HyracksDataException {
+    /**
+     * Releases the page and unpins it from the buffer cache, clearing the 
reference to the page.
+     */
+    protected void releasePage() {
         if (exclusiveLatchNodes) {
-            page.releaseWriteLatch(isPageDirty);
+            page.releaseWriteLatch(false);
         } else {
             page.releaseReadLatch();
         }
         bufferCache.unpin(page);
+        page = null;
     }

     protected ICachedPage acquirePage(int pageId) throws HyracksDataException {
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTree.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTree.java
index 282aad9..1cbe31d 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTree.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTree.java
@@ -222,7 +222,7 @@
         }

         @Override
-        protected void releasePage() throws HyracksDataException {
+        protected void releasePage() {
             if (page != null) {
                 bufferCache.unpin(page);
                 page = null;
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreePointSearchCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreePointSearchCursor.java
index 1bf3ecf..a1f04c6 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreePointSearchCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreePointSearchCursor.java
@@ -69,7 +69,6 @@
         originalKeyCmp = initialState.getOriginalKeyComparator();
         pageId = ((BTreeCursorInitialState) initialState).getPageId();
         page = initialState.getPage();
-        isPageDirty = false;
         frame.setPage(page);

         pred = (RangePredicate) searchPred;
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreeRangeSearchCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreeRangeSearchCursor.java
index d788398..d62ca91 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreeRangeSearchCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-btree/src/main/java/org/apache/hyracks/storage/am/btree/impls/DiskBTreeRangeSearchCursor.java
@@ -66,8 +66,9 @@
     }

     @Override
-    protected void releasePage() throws HyracksDataException {
+    protected void releasePage() {
         bufferCache.unpin(page);
+        page = null;
     }

     @Override
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
index 36fba76..b0a2c71 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
@@ -142,7 +142,10 @@
         return false;
     }

-    protected void releasePage() throws HyracksDataException {
+    /**
+     * Releases the current page, if it is not null, clearing the reference to 
it.
+     */
+    protected void releasePage() {
         if (page != null) {
             page.releaseReadLatch();
             bufferCache.unpin(page);
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
index e77acea..f801025 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/MultitenantVirtualBufferCache.java
@@ -70,7 +70,7 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
         vbc.unpin(page);
     }

diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/VirtualBufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/VirtualBufferCache.java
index 5871b31..60b38dd 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/VirtualBufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/VirtualBufferCache.java
@@ -317,7 +317,7 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
     }

     @Override
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/AbstractOnDiskInvertedListCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/AbstractOnDiskInvertedListCursor.java
index 9886da4..b68a163 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/AbstractOnDiskInvertedListCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/AbstractOnDiskInvertedListCursor.java
@@ -219,6 +219,7 @@

             currentBufferIdx++;
             bufferCache.unpin(page);
+            page = null;
             bufferEndPageId = i;

             // Buffer full?
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/ondisk/fixedsize/FixedSizeElementInvertedListScanCursor.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/ondisk/fixedsize/FixedSizeElementInvertedListScanCursor.java
index 458eb6b..cdc0701 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/ondisk/fixedsize/FixedSizeElementInvertedListScanCursor.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/ondisk/fixedsize/FixedSizeElementInvertedListScanCursor.java
@@ -127,7 +127,7 @@
     }

     @Override
-    public void unloadPages() throws HyracksDataException {
+    public void unloadPages() {
         if (pinned) {
             bufferCache.unpin(page);
             pinned = false;
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/BufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/BufferCache.java
index d7be126..cf3c104 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/BufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/BufferCache.java
@@ -573,9 +573,9 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
         if (closed) {
-            throw new HyracksDataException("unpin called on a closed cache");
+            throw new IllegalStateException("unpin called on a closed cache");
         }
         int pinCount = ((CachedPage) page).decrementAndGetPinCount();
         if (DEBUG && pinCount == 0) {
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/DebugBufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/DebugBufferCache.java
index 8c3d492..88f3035 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/DebugBufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/DebugBufferCache.java
@@ -84,7 +84,7 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
         bufferCache.unpin(page);
         unpinCount.addAndGet(1);
     }
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/IBufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/IBufferCache.java
index df0bea8..f133d80 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/IBufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-common/src/main/java/org/apache/hyracks/storage/common/buffercache/IBufferCache.java
@@ -109,9 +109,8 @@
      *
      * @param page
      *            the page
-     * @throws HyracksDataException
      */
-    void unpin(ICachedPage page) throws HyracksDataException;
+    void unpin(ICachedPage page);

     /**
      * Flush the page if it is dirty
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/StorageFileAccessTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/StorageFileAccessTest.java
index 576c6bb..226d3ed 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/StorageFileAccessTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/StorageFileAccessTest.java
@@ -143,31 +143,27 @@

         private void unpinRandomPage() {
             int index = Math.abs(rnd.nextInt() % pinnedPages.size());
-            try {
-                PinnedLatchedPage plPage = pinnedPages.get(index);
+            PinnedLatchedPage plPage = pinnedPages.get(index);

-                if (plPage.latch != null) {
-                    if (plPage.latch == LatchType.LATCH_S) {
-                        if (LOGGER.isInfoEnabled()) {
-                            LOGGER.info(workerId + " S UNLATCHING: " + 
plPage.pageId);
-                        }
-                        plPage.page.releaseReadLatch();
-                    } else {
-                        if (LOGGER.isInfoEnabled()) {
-                            LOGGER.info(workerId + " X UNLATCHING: " + 
plPage.pageId);
-                        }
-                        plPage.page.releaseWriteLatch(true);
+            if (plPage.latch != null) {
+                if (plPage.latch == LatchType.LATCH_S) {
+                    if (LOGGER.isInfoEnabled()) {
+                        LOGGER.info(workerId + " S UNLATCHING: " + 
plPage.pageId);
                     }
+                    plPage.page.releaseReadLatch();
+                } else {
+                    if (LOGGER.isInfoEnabled()) {
+                        LOGGER.info(workerId + " X UNLATCHING: " + 
plPage.pageId);
+                    }
+                    plPage.page.releaseWriteLatch(true);
                 }
-                if (LOGGER.isInfoEnabled()) {
-                    LOGGER.info(workerId + " UNPINNING PAGE: " + 
plPage.pageId);
-                }
-
-                bufferCache.unpin(plPage.page);
-                pinnedPages.remove(index);
-            } catch (HyracksDataException e) {
-                e.printStackTrace();
             }
+            if (LOGGER.isInfoEnabled()) {
+                LOGGER.info(workerId + " UNPINNING PAGE: " + plPage.pageId);
+            }
+
+            bufferCache.unpin(plPage.page);
+            pinnedPages.remove(index);
         }

         private void openFile() {
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestVirtualBufferCache.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestVirtualBufferCache.java
index 8cad497..d7a83dc 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestVirtualBufferCache.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestVirtualBufferCache.java
@@ -101,7 +101,7 @@
     }

     @Override
-    public void unpin(ICachedPage page) throws HyracksDataException {
+    public void unpin(ICachedPage page) {
         vbc.unpin(page);
     }


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Gerrit-Project: asterixdb
Gerrit-Branch: neo
Gerrit-Change-Id: I2f8c64fa76beecbebcb40cf2a86866189cb1c55a
Gerrit-Change-Number: 19883
Gerrit-PatchSet: 4
Gerrit-Owner: Michael Blow <[email protected]>
Gerrit-Reviewer: Ali Alsuliman <[email protected]>
Gerrit-Reviewer: Anon. E. Moose #1000171
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Michael Blow <[email protected]>
Gerrit-MessageType: merged

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