[jira] [Created] (HBASE-25796) Batch version of checkAndMutate on AsyncTable always returns false

["Hochul Shin (Jira)" <ji...@apache.org>]

Hochul Shin created HBASE-25796:
-----------------------------------

             Summary: Batch version of checkAndMutate on AsyncTable always returns false
                 Key: HBASE-25796
                 URL: https://issues.apache.org/jira/browse/HBASE-25796
             Project: HBase
          Issue Type: Bug
          Components: Client
    Affects Versions: 2.4.1
            Reporter: Hochul Shin


Batch version of CheckAndMutate always returns false whereas non-batch version works fine. 

The code is like: 

```

AysncTable<?> table = connection.getTable(tableName, executorService);

...

// add r1

table.put(Arrays.asList(
 new Put(Bytes.toBytes("r1")).addColumn(COL_FAMILY, Bytes.toBytes("q1"), Bytes.toBytes("v1"))));

CheckAndMutate checkAndMutate1 = CheckAndMutate.newBuilder(Bytes.toBytes("r1"))
 .ifNotExists(COL_FAMILY, Bytes.toBytes("q1"))
 .build(new Put(Bytes.toBytes("r1")).addColumn(COL_FAMILY, Bytes.toBytes("q1"), Bytes.toBytes("v1")));

CheckAndMutate checkAndMutate2 = CheckAndMutate.newBuilder(Bytes.toBytes("r2"))
 .ifNotExists(COL_FAMILY, Bytes.toBytes("q2"))
 .build(new Put(Bytes.toBytes("r2")).addColumn(COL_FAMILY, Bytes.toBytes("q2"), Bytes.toBytes("v2")));

```

With batch version of checkAndMutate

```

List<CompletableFuture<CheckAndMutateResult>> results =
   table.checkAndMutate(Arrays.asList(checkAndMutate1, checkAndMutate2));

System.out.println("first: " + results.get(0).join().isSuccess());  // false
System.out.println("second: " + results.get(1).join().isSuccess()); //false!

```

Even it returned false, the item was written to the table. 

 

With non-batch version of checkAndMutate

```

CompletableFuture<CheckAndMutateResult> result1 = table.checkAndMutate(checkAndMutate1);
 CompletableFuture<CheckAndMutateResult> result2 = table.checkAndMutate(checkAndMutate2);

System.out.println("first: " + result1.join().isSuccess()); // false 
 System.out.println("second: " + result2.join().isSuccess()); // true as expected

```

As expected r1 wasn't written to the table. 



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