Hochul Shin created HBASE-25797:
-----------------------------------
Summary: Batch version of checkAndMutate on AsyncTable always
returns false
Key: HBASE-25797
URL: https://issues.apache.org/jira/browse/HBASE-25797
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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