[GitHub] [pulsar] nodece commented on a diff in pull request #20303: [fix] [meta]Switch to the metadata store thread after zk operation

["nodece (via GitHub)" <gi...@apache.org>]

nodece commented on code in PR #20303:
URL: https://github.com/apache/pulsar/pull/20303#discussion_r1191888657


##########
pulsar-metadata/src/test/java/org/apache/pulsar/metadata/MetadataStoreTest.java:
##########
@@ -425,6 +428,75 @@ public void testDeleteUnusedDirectories(String provider, Supplier<String> urlSup
         assertFalse(store.exists(prefix).join());
     }
 
+    @DataProvider(name = "conditionOfSwitchThread")
+    public Object[][] conditionOfSwitchThread(){
+        return new Object[][]{
+            {false, false},
+            {false, true},
+            {true, false},
+            {true, true}
+        };
+    }
+
+    @Test(dataProvider = "conditionOfSwitchThread")
+    public void testThreadSwitchOfZkMetadataStore(boolean hasSynchronizer, boolean enabledBatch) throws Exception {
+        final String prefix = newKey();
+        final String metadataStoreName = UUID.randomUUID().toString().replaceAll("-", "");
+        MetadataStoreConfig.MetadataStoreConfigBuilder builder =
+                MetadataStoreConfig.builder().metadataStoreName(metadataStoreName);
+        builder.fsyncEnable(false);
+        builder.batchingEnabled(enabledBatch);
+        if (!hasSynchronizer) {
+            builder.synchronizer(null);
+        }
+        MetadataStoreConfig config = builder.build();
+        @Cleanup
+        ZKMetadataStore store = (ZKMetadataStore) MetadataStoreFactory.create(zks.getConnectionString(), config);
+
+        final Runnable verify = () -> {
+            String currentThreadName = Thread.currentThread().getName();
+            String errorMessage = String.format("Expect to switch to thread %s, but currently it is thread %s",
+                    metadataStoreName, currentThreadName);
+            if (!Thread.currentThread().getName().startsWith(metadataStoreName)){

Review Comment:
   ```suggestion
   assertTrue(Thread.currentThread().getName().startsWith(metadataStoreName), errorMessage);
   ```



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