eolivelli 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_r171974871
 
 

 ##########
 File path: 
bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/EntryLogTest.java
 ##########
 @@ -391,4 +400,135 @@ public void testGetEntryLogsSet() throws Exception {
 
         assertEquals(Sets.newHashSet(0L, 1L, 2L, 3L), 
logger.getEntryLogsSet());
     }
+
+    static 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;
+        }
+    }
+
+    static 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() {
+            try {
+                String expectedValue = generateDataString(ledgerId, entryId);
+                ByteBuf byteBuf = ledgerStorage.getEntry(ledgerId, entryId);
+                long actualLedgerId = byteBuf.readLong();
+                long actualEntryId = byteBuf.readLong();
+                byte[] data = new byte[byteBuf.readableBytes()];
+                byteBuf.readBytes(data);
+                if (ledgerId != actualLedgerId) {
+                    LOG.error("For ledgerId: {} entryId: {} readRequest, 
actual ledgerId: {}", ledgerId, entryId,
+                            actualLedgerId);
+                    return false;
+                }
+                if (entryId != actualEntryId) {
+                    LOG.error("For ledgerId: {} entryId: {} readRequest, 
actual entryId: {}", ledgerId, entryId,
+                            actualEntryId);
+                    return false;
+                }
+                if (!expectedValue.equals(new String(data))) {
+                    LOG.error("For ledgerId: {} entryId: {} readRequest, 
actual Data: {}", ledgerId, entryId,
+                            new String(data));
+                    return false;
+                }
+            } catch (IOException e) {
+                LOG.error("Got Exception for GetEntry call. LedgerId: " + 
ledgerId + " entryId: " + entryId, e);
+                return false;
+            }
+            return true;
+        }
+    }
+
+    /**
+     * test concurrent write operations and then concurrent read
+     * operations using InterleavedLedgerStorage.
+     */
+    @Test
+    public void testConcurrentWriteAndReadCallsOfInterleavedLedgerStorage() 
throws Exception {
+        File ledgerDir = createTempDir("bkTest", ".dir");
+        ServerConfiguration conf = 
TestBKConfiguration.newServerConfiguration();
+        conf.setJournalDirName(ledgerDir.toString());
+        conf.setLedgerDirNames(new String[] { ledgerDir.getAbsolutePath()});
+        conf.setLedgerStorageClass(InterleavedLedgerStorage.class.getName());
+        Bookie bookie = new Bookie(conf);
+        InterleavedLedgerStorage ledgerStorage = ((InterleavedLedgerStorage) 
bookie.ledgerStorage);
+
+        int numOfLedgers = 70;
+        int numEntries = 2000;
+        // Create ledgers
+        for (int i = 0; i < numOfLedgers; i++) {
+            ledgerStorage.setMasterKey(i, "key".getBytes());
+        }
+
+        ExecutorService executor = Executors.newFixedThreadPool(10);
 
 Review comment:
   It seems to me that we are noy shutting down this pool

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