reddycharan commented on a change in pull request #1225: Issue #570: getting 
rid of unnecessary synchronization in InterleavedLedgerStorage
URL: https://github.com/apache/bookkeeper/pull/1225#discussion_r171939731
 
 

 ##########
 File path: 
bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/EntryLogTest.java
 ##########
 @@ -391,4 +400,137 @@ public void testGetEntryLogsSet() throws Exception {
 
         assertEquals(Sets.newHashSet(0L, 1L, 2L, 3L), 
logger.getEntryLogsSet());
     }
+
+    class LedgerStorageWriteTask implements Callable<Boolean> {
+        long ledgerId;
+        int entryId;
+        LedgerStorage ledgerStorage;
+
+        LedgerStorageWriteTask(long ledgerId, int entryId, LedgerStorage 
ledgerStorage) {
+            this.ledgerId = ledgerId;
+            this.entryId = entryId;
+            this.ledgerStorage = ledgerStorage;
+        }
+
+        @Override
+        public Boolean call() {
+            try {
+                ledgerStorage.addEntry(generateEntry(ledgerId, entryId));
+            } catch (IOException e) {
+                LOG.error("Got Exception for AddEntry call. LedgerId: " + 
ledgerId + " entryId: " + entryId, e);
+                return false;
+            }
+            return true;
+        }
+    }
+
+    class LedgerStorageReadTask implements Callable<Boolean> {
+        long ledgerId;
+        int entryId;
+        LedgerStorage ledgerStorage;
+
+        LedgerStorageReadTask(long ledgerId, int entryId, LedgerStorage 
ledgerStorage) {
+            this.ledgerId = ledgerId;
+            this.entryId = entryId;
+            this.ledgerStorage = ledgerStorage;
+        }
+
+        @Override
+        public Boolean call() {
 
 Review comment:
   other than removing redundant .isDone check, I would keep the rest of the 
test logic as it is now. For diagnosing in the case of failure, it is helpful 
to have assert failures and proper error log lines (by catching the error and 
log it) rather than failing with generic cancellation exception or 
executionexception when we call future.get(). 

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